Dump from SVN

firmware/lib/Adafruit-MCP23017-Arduino-Library-master/.github/ISSUE_TEMPLATE.md

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+Thank you for opening an issue on an Adafruit Arduino library repository.  To
+improve the speed of resolution please review the following guidelines and
+common troubleshooting steps below before creating the issue:
+
+- **Do not use GitHub issues for troubleshooting projects and issues.**  Instead use
+  the forums at http://forums.adafruit.com to ask questions and troubleshoot why
+  something isn't working as expected.  In many cases the problem is a common issue
+  that you will more quickly receive help from the forum community.  GitHub issues
+  are meant for known defects in the code.  If you don't know if there is a defect
+  in the code then start with troubleshooting on the forum first.
+
+- **If following a tutorial or guide be sure you didn't miss a step.** Carefully
+  check all of the steps and commands to run have been followed.  Consult the
+  forum if you're unsure or have questions about steps in a guide/tutorial.
+
+- **For Arduino projects check these very common issues to ensure they don't apply**:
+
+  - For uploading sketches or communicating with the board make sure you're using
+    a **USB data cable** and **not** a **USB charge-only cable**.  It is sometimes
+    very hard to tell the difference between a data and charge cable!  Try using the
+    cable with other devices or swapping to another cable to confirm it is not
+    the problem.
+
+  - **Be sure you are supplying adequate power to the board.**  Check the specs of
+    your board and plug in an external power supply.  In many cases just
+    plugging a board into your computer is not enough to power it and other
+    peripherals.
+
+  - **Double check all soldering joints and connections.**  Flakey connections
+    cause many mysterious problems.  See the [guide to excellent soldering](https://learn.adafruit.com/adafruit-guide-excellent-soldering/tools) for examples of good solder joints.
+
+  - **Ensure you are using an official Arduino or Adafruit board.** We can't
+    guarantee a clone board will have the same functionality and work as expected
+    with this code and don't support them.
+
+If you're sure this issue is a defect in the code and checked the steps above
+please fill in the following fields to provide enough troubleshooting information.
+You may delete the guideline and text above to just leave the following details:
+
+- Arduino board:  **INSERT ARDUINO BOARD NAME/TYPE HERE**
+
+- Arduino IDE version (found in Arduino -> About Arduino menu):  **INSERT ARDUINO
+  VERSION HERE**
+
+- List the steps to reproduce the problem below (if possible attach a sketch or
+  copy the sketch code in too): **LIST REPRO STEPS BELOW**

firmware/lib/Adafruit-MCP23017-Arduino-Library-master/.github/PULL_REQUEST_TEMPLATE.md

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+Thank you for creating a pull request to contribute to Adafruit's GitHub code!
+Before you open the request please review the following guidelines and tips to
+help it be more easily integrated:
+
+- **Describe the scope of your change--i.e. what the change does and what parts
+  of the code were modified.**  This will help us understand any risks of integrating
+  the code.
+
+- **Describe any known limitations with your change.**  For example if the change
+  doesn't apply to a supported platform of the library please mention it.
+
+- **Please run any tests or examples that can exercise your modified code.**  We
+  strive to not break users of the code and running tests/examples helps with this
+  process.
+
+Thank you again for contributing!  We will try to test and integrate the change
+as soon as we can, but be aware we have many GitHub repositories to manage and
+can't immediately respond to every request.  There is no need to bump or check in
+on a pull request (it will clutter the discussion of the request).
+
+Also don't be worried if the request is closed or not integrated--sometimes the
+priorities of Adafruit's GitHub code (education, ease of use) might not match the
+priorities of the pull request.  Don't fret, the open source community thrives on
+forks and GitHub makes it easy to keep your changes in a forked repo.
+
+After reviewing the guidelines above you can delete this text from the pull request.

firmware/lib/Adafruit-MCP23017-Arduino-Library-master/Adafruit_MCP23017.cpp

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+/*************************************************** 
+ This is a library for the MCP23017 i2c port expander
+
+ These displays use I2C to communicate, 2 pins are required to
+ interface
+ Adafruit invests time and resources providing this open source code,
+ please support Adafruit and open-source hardware by purchasing
+ products from Adafruit!
+
+ Written by Limor Fried/Ladyada for Adafruit Industries.
+ BSD license, all text above must be included in any redistribution
+ ****************************************************/
+
+#ifdef __AVR
+  #include <avr/pgmspace.h>
+#elif defined(ESP8266)
+  #include <pgmspace.h>
+#endif
+#include "Adafruit_MCP23017.h"
+
+#if ARDUINO >= 100
+#include "Arduino.h"
+#else
+#include "WProgram.h"
+#endif
+
+// minihelper to keep Arduino backward compatibility
+static inline void wiresend(uint8_t x) {
+#if ARDUINO >= 100
+	Wire.write((uint8_t) x);
+#else
+	Wire.send(x);
+#endif
+}
+
+static inline uint8_t wirerecv(void) {
+#if ARDUINO >= 100
+	return Wire.read();
+#else
+	return Wire.receive();
+#endif
+}
+
+/**
+ * Bit number associated to a give Pin
+ */
+uint8_t Adafruit_MCP23017::bitForPin(uint8_t pin){
+	return pin%8;
+}
+
+/**
+ * Register address, port dependent, for a given PIN
+ */
+uint8_t Adafruit_MCP23017::regForPin(uint8_t pin, uint8_t portAaddr, uint8_t portBaddr){
+	return(pin<8) ?portAaddr:portBaddr;
+}
+
+/**
+ * Reads a given register
+ */
+uint8_t Adafruit_MCP23017::readRegister(uint8_t addr){
+	// read the current GPINTEN
+	Wire.beginTransmission(MCP23017_ADDRESS | i2caddr);
+	wiresend(addr);
+	Wire.endTransmission();
+	Wire.requestFrom(MCP23017_ADDRESS | i2caddr, 1);
+	return wirerecv();
+}
+
+
+/**
+ * Writes a given register
+ */
+void Adafruit_MCP23017::writeRegister(uint8_t regAddr, uint8_t regValue){
+	// Write the register
+	Wire.beginTransmission(MCP23017_ADDRESS | i2caddr);
+	wiresend(regAddr);
+	wiresend(regValue);
+	Wire.endTransmission();
+}
+
+
+/**
+ * Helper to update a single bit of an A/B register.
+ * - Reads the current register value
+ * - Writes the new register value
+ */
+void Adafruit_MCP23017::updateRegisterBit(uint8_t pin, uint8_t pValue, uint8_t portAaddr, uint8_t portBaddr) {
+	uint8_t regValue;
+	uint8_t regAddr=regForPin(pin,portAaddr,portBaddr);
+	uint8_t bit=bitForPin(pin);
+	regValue = readRegister(regAddr);
+
+	// set the value for the particular bit
+	bitWrite(regValue,bit,pValue);
+
+	writeRegister(regAddr,regValue);
+}
+
+////////////////////////////////////////////////////////////////////////////////
+
+/**
+ * Initializes the MCP23017 given its HW selected address, see datasheet for Address selection.
+ */
+void Adafruit_MCP23017::begin(uint8_t addr) {
+	if (addr > 7) {
+		addr = 7;
+	}
+	i2caddr = addr;
+
+	Wire.begin();
+
+	// set defaults!
+	// all inputs on port A and B
+	writeRegister(MCP23017_IODIRA,0xff);
+	writeRegister(MCP23017_IODIRB,0xff);
+}
+
+/**
+ * Initializes the default MCP23017, with 000 for the configurable part of the address
+ */
+void Adafruit_MCP23017::begin(void) {
+	begin(0);
+}
+
+/**
+ * Sets the pin mode to either INPUT or OUTPUT
+ */
+void Adafruit_MCP23017::pinMode(uint8_t p, uint8_t d) {
+	updateRegisterBit(p,(d==INPUT),MCP23017_IODIRA,MCP23017_IODIRB);
+}
+
+/**
+ * Reads all 16 pins (port A and B) into a single 16 bits variable.
+ */
+uint16_t Adafruit_MCP23017::readGPIOAB() {
+	uint16_t ba = 0;
+	uint8_t a;
+
+	// read the current GPIO output latches
+	Wire.beginTransmission(MCP23017_ADDRESS | i2caddr);
+	wiresend(MCP23017_GPIOA);
+	Wire.endTransmission();
+
+	Wire.requestFrom(MCP23017_ADDRESS | i2caddr, 2);
+	a = wirerecv();
+	ba = wirerecv();
+	ba <<= 8;
+	ba |= a;
+
+	return ba;
+}
+
+/**
+ * Read a single port, A or B, and return its current 8 bit value.
+ * Parameter b should be 0 for GPIOA, and 1 for GPIOB.
+ */
+uint8_t Adafruit_MCP23017::readGPIO(uint8_t b) {
+
+	// read the current GPIO output latches
+	Wire.beginTransmission(MCP23017_ADDRESS | i2caddr);
+	if (b == 0)
+		wiresend(MCP23017_GPIOA);
+	else {
+		wiresend(MCP23017_GPIOB);
+	}
+	Wire.endTransmission();
+
+	Wire.requestFrom(MCP23017_ADDRESS | i2caddr, 1);
+	return wirerecv();
+}
+
+/**
+ * Writes all the pins in one go. This method is very useful if you are implementing a multiplexed matrix and want to get a decent refresh rate.
+ */
+void Adafruit_MCP23017::writeGPIOAB(uint16_t ba) {
+	Wire.beginTransmission(MCP23017_ADDRESS | i2caddr);
+	wiresend(MCP23017_GPIOA);
+	wiresend(ba & 0xFF);
+	wiresend(ba >> 8);
+	Wire.endTransmission();
+}
+
+void Adafruit_MCP23017::digitalWrite(uint8_t pin, uint8_t d) {
+	uint8_t gpio;
+	uint8_t bit=bitForPin(pin);
+
+
+	// read the current GPIO output latches
+	uint8_t regAddr=regForPin(pin,MCP23017_OLATA,MCP23017_OLATB);
+	gpio = readRegister(regAddr);
+
+	// set the pin and direction
+	bitWrite(gpio,bit,d);
+
+	// write the new GPIO
+	regAddr=regForPin(pin,MCP23017_GPIOA,MCP23017_GPIOB);
+	writeRegister(regAddr,gpio);
+}
+
+void Adafruit_MCP23017::pullUp(uint8_t p, uint8_t d) {
+	updateRegisterBit(p,d,MCP23017_GPPUA,MCP23017_GPPUB);
+}
+
+uint8_t Adafruit_MCP23017::digitalRead(uint8_t pin) {
+	uint8_t bit=bitForPin(pin);
+	uint8_t regAddr=regForPin(pin,MCP23017_GPIOA,MCP23017_GPIOB);
+	return (readRegister(regAddr) >> bit) & 0x1;
+}
+
+/**
+ * Configures the interrupt system. both port A and B are assigned the same configuration.
+ * Mirroring will OR both INTA and INTB pins.
+ * Opendrain will set the INT pin to value or open drain.
+ * polarity will set LOW or HIGH on interrupt.
+ * Default values after Power On Reset are: (false, false, LOW)
+ * If you are connecting the INTA/B pin to arduino 2/3, you should configure the interupt handling as FALLING with
+ * the default configuration.
+ */
+void Adafruit_MCP23017::setupInterrupts(uint8_t mirroring, uint8_t openDrain, uint8_t polarity){
+	// configure the port A
+	uint8_t ioconfValue=readRegister(MCP23017_IOCONA);
+	bitWrite(ioconfValue,6,mirroring);
+	bitWrite(ioconfValue,2,openDrain);
+	bitWrite(ioconfValue,1,polarity);
+	writeRegister(MCP23017_IOCONA,ioconfValue);
+
+	// Configure the port B
+	ioconfValue=readRegister(MCP23017_IOCONB);
+	bitWrite(ioconfValue,6,mirroring);
+	bitWrite(ioconfValue,2,openDrain);
+	bitWrite(ioconfValue,1,polarity);
+	writeRegister(MCP23017_IOCONB,ioconfValue);
+}
+
+/**
+ * Set's up a pin for interrupt. uses arduino MODEs: CHANGE, FALLING, RISING.
+ *
+ * Note that the interrupt condition finishes when you read the information about the port / value
+ * that caused the interrupt or you read the port itself. Check the datasheet can be confusing.
+ *
+ */
+void Adafruit_MCP23017::setupInterruptPin(uint8_t pin, uint8_t mode) {
+
+	// set the pin interrupt control (0 means change, 1 means compare against given value);
+	updateRegisterBit(pin,(mode!=CHANGE),MCP23017_INTCONA,MCP23017_INTCONB);
+	// if the mode is not CHANGE, we need to set up a default value, different value triggers interrupt
+
+	// In a RISING interrupt the default value is 0, interrupt is triggered when the pin goes to 1.
+	// In a FALLING interrupt the default value is 1, interrupt is triggered when pin goes to 0.
+	updateRegisterBit(pin,(mode==FALLING),MCP23017_DEFVALA,MCP23017_DEFVALB);
+
+	// enable the pin for interrupt
+	updateRegisterBit(pin,HIGH,MCP23017_GPINTENA,MCP23017_GPINTENB);
+
+}
+
+uint8_t Adafruit_MCP23017::getLastInterruptPin(){
+	uint8_t intf;
+
+	// try port A
+	intf=readRegister(MCP23017_INTFA);
+	for(int i=0;i<8;i++) if (bitRead(intf,i)) return i;
+
+	// try port B
+	intf=readRegister(MCP23017_INTFB);
+	for(int i=0;i<8;i++) if (bitRead(intf,i)) return i+8;
+
+	return MCP23017_INT_ERR;
+
+}
+uint8_t Adafruit_MCP23017::getLastInterruptPinValue(){
+	uint8_t intPin=getLastInterruptPin();
+	if(intPin!=MCP23017_INT_ERR){
+		uint8_t intcapreg=regForPin(intPin,MCP23017_INTCAPA,MCP23017_INTCAPB);
+		uint8_t bit=bitForPin(intPin);
+		return (readRegister(intcapreg)>>bit) & (0x01);
+	}
+
+	return MCP23017_INT_ERR;
+}
+
+

firmware/lib/Adafruit-MCP23017-Arduino-Library-master/Adafruit_MCP23017.h

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+/*************************************************** 
+  This is a library for the MCP23017 i2c port expander
+
+  These displays use I2C to communicate, 2 pins are required to  
+  interface
+  Adafruit invests time and resources providing this open source code, 
+  please support Adafruit and open-source hardware by purchasing 
+  products from Adafruit!
+
+  Written by Limor Fried/Ladyada for Adafruit Industries.  
+  BSD license, all text above must be included in any redistribution
+ ****************************************************/
+
+#ifndef _Adafruit_MCP23017_H_
+#define _Adafruit_MCP23017_H_
+
+// Don't forget the Wire library
+#ifndef ARDUINO_AVR_GEMMA
+                                    //TinyWireM is now part of
+                                    //   Adafruit version of Wire Library, so this
+                                    // will work with Adafruit ATtiny85's
+                                    //But Arduino Gemma doesn't use that library
+                                    // We do NOT want to include Wire if it's an arduino Gemma
+  #include <Wire.h>
+#else
+  #include <TinyWireM.h>
+  #define Wire TinyWireM
+#endif
+
+
+class Adafruit_MCP23017 {
+public:
+  void begin(uint8_t addr);
+  void begin(void);
+
+  void pinMode(uint8_t p, uint8_t d);
+  void digitalWrite(uint8_t p, uint8_t d);
+  void pullUp(uint8_t p, uint8_t d);
+  uint8_t digitalRead(uint8_t p);
+
+  void writeGPIOAB(uint16_t);
+  uint16_t readGPIOAB();
+  uint8_t readGPIO(uint8_t b);
+
+  void setupInterrupts(uint8_t mirroring, uint8_t open, uint8_t polarity);
+  void setupInterruptPin(uint8_t p, uint8_t mode);
+  uint8_t getLastInterruptPin();
+  uint8_t getLastInterruptPinValue();
+
+ private:
+  uint8_t i2caddr;
+
+  uint8_t bitForPin(uint8_t pin);
+  uint8_t regForPin(uint8_t pin, uint8_t portAaddr, uint8_t portBaddr);
+
+  uint8_t readRegister(uint8_t addr);
+  void writeRegister(uint8_t addr, uint8_t value);
+
+  /**
+   * Utility private method to update a register associated with a pin (whether port A/B)
+   * reads its value, updates the particular bit, and writes its value.
+   */
+  void updateRegisterBit(uint8_t p, uint8_t pValue, uint8_t portAaddr, uint8_t portBaddr);
+
+};
+
+#define MCP23017_ADDRESS 0x20
+
+// registers
+#define MCP23017_IODIRA 0x00
+#define MCP23017_IPOLA 0x02
+#define MCP23017_GPINTENA 0x04
+#define MCP23017_DEFVALA 0x06
+#define MCP23017_INTCONA 0x08
+#define MCP23017_IOCONA 0x0A
+#define MCP23017_GPPUA 0x0C
+#define MCP23017_INTFA 0x0E
+#define MCP23017_INTCAPA 0x10
+#define MCP23017_GPIOA 0x12
+#define MCP23017_OLATA 0x14
+
+
+#define MCP23017_IODIRB 0x01
+#define MCP23017_IPOLB 0x03
+#define MCP23017_GPINTENB 0x05
+#define MCP23017_DEFVALB 0x07
+#define MCP23017_INTCONB 0x09
+#define MCP23017_IOCONB 0x0B
+#define MCP23017_GPPUB 0x0D
+#define MCP23017_INTFB 0x0F
+#define MCP23017_INTCAPB 0x11
+#define MCP23017_GPIOB 0x13
+#define MCP23017_OLATB 0x15
+
+#define MCP23017_INT_ERR 255
+
+#endif

firmware/lib/Adafruit-MCP23017-Arduino-Library-master/README.txt

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+This is a library for the MCP23017 I2c Port Expander
+ 
+These chips use I2C to communicate, 2 pins required to interface
+
+Adafruit invests time and resources providing this open source code, 
+please support Adafruit and open-source hardware by purchasing 
+products from Adafruit!
+
+Written by Limor Fried/Ladyada  for Adafruit Industries.  
+BSD license, check license.txt for more information
+All text above must be included in any redistribution
+
+To download. click the DOWNLOADS button in the top right corner, rename the uncompressed folder Adafruit_MCP23017. Check that the Adafruit_MCP23017 folder contains Adafruit_MCP23017.cpp and Adafruit_MCP23017.h
+
+Place the Adafruit_MCP23017 library folder your <arduinosketchfolder>/libraries/ folder. You may need to create the libraries subfolder if its your first library. Restart the IDE.

firmware/lib/Adafruit-MCP23017-Arduino-Library-master/examples/button/button.ino

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+#include <Wire.h>
+#include "Adafruit_MCP23017.h"
+
+// Basic pin reading and pullup test for the MCP23017 I/O expander
+// public domain!
+
+// Connect pin #12 of the expander to Analog 5 (i2c clock)
+// Connect pin #13 of the expander to Analog 4 (i2c data)
+// Connect pins #15, 16 and 17 of the expander to ground (address selection)
+// Connect pin #9 of the expander to 5V (power)
+// Connect pin #10 of the expander to ground (common ground)
+// Connect pin #18 through a ~10kohm resistor to 5V (reset pin, active low)
+
+// Input #0 is on pin 21 so connect a button or switch from there to ground
+
+Adafruit_MCP23017 mcp;
+  
+void setup() {  
+  mcp.begin();      // use default address 0
+
+  mcp.pinMode(0, INPUT);
+  mcp.pullUp(0, HIGH);  // turn on a 100K pullup internally
+
+  pinMode(13, OUTPUT);  // use the p13 LED as debugging
+}
+
+
+
+void loop() {
+  // The LED will 'echo' the button
+  digitalWrite(13, mcp.digitalRead(0));
+}

firmware/lib/Adafruit-MCP23017-Arduino-Library-master/examples/interrupt/interrupt.ino

@@ -0,0 +1,123 @@
+// Install the LowPower library for optional sleeping support.
+// See loop() function comments for details on usage.
+//#include <LowPower.h>
+
+#include <Wire.h>
+#include <Adafruit_MCP23017.h>
+
+Adafruit_MCP23017 mcp;
+
+byte ledPin=13;
+
+// Interrupts from the MCP will be handled by this PIN
+byte arduinoIntPin=3;
+
+// ... and this interrupt vector
+byte arduinoInterrupt=1;
+
+volatile boolean awakenByInterrupt = false;
+
+// Two pins at the MCP (Ports A/B where some buttons have been setup.)
+// Buttons connect the pin to grond, and pins are pulled up.
+byte mcpPinA=7;
+byte mcpPinB=15;
+
+void setup(){
+
+  Serial.begin(9600);
+  Serial.println("MCP23007 Interrupt Test");
+
+  pinMode(arduinoIntPin,INPUT);
+
+  mcp.begin();      // use default address 0
+  
+  // We mirror INTA and INTB, so that only one line is required between MCP and Arduino for int reporting
+  // The INTA/B will not be Floating 
+  // INTs will be signaled with a LOW
+  mcp.setupInterrupts(true,false,LOW);
+
+  // configuration for a button on port A
+  // interrupt will triger when the pin is taken to ground by a pushbutton
+  mcp.pinMode(mcpPinA, INPUT);
+  mcp.pullUp(mcpPinA, HIGH);  // turn on a 100K pullup internally
+  mcp.setupInterruptPin(mcpPinA,FALLING); 
+
+  // similar, but on port B.
+  mcp.pinMode(mcpPinB, INPUT);
+  mcp.pullUp(mcpPinB, HIGH);  // turn on a 100K pullup internall
+  mcp.setupInterruptPin(mcpPinB,FALLING);
+
+  // We will setup a pin for flashing from the int routine
+  pinMode(ledPin, OUTPUT);  // use the p13 LED as debugging
+  
+}
+
+// The int handler will just signal that the int has happen
+// we will do the work from the main loop.
+void intCallBack(){
+  awakenByInterrupt=true;
+}
+
+void handleInterrupt(){
+  
+  // Get more information from the MCP from the INT
+  uint8_t pin=mcp.getLastInterruptPin();
+  uint8_t val=mcp.getLastInterruptPinValue();
+  
+  // We will flash the led 1 or 2 times depending on the PIN that triggered the Interrupt
+  // 3 and 4 flases are supposed to be impossible conditions... just for debugging.
+  uint8_t flashes=4; 
+  if(pin==mcpPinA) flashes=1;
+  if(pin==mcpPinB) flashes=2;
+  if(val!=LOW) flashes=3;
+
+  // simulate some output associated to this
+  for(int i=0;i<flashes;i++){  
+    delay(100);
+    digitalWrite(ledPin,HIGH);
+    delay(100);
+    digitalWrite(ledPin,LOW);
+  }
+
+  // we have to wait for the interrupt condition to finish
+  // otherwise we might go to sleep with an ongoing condition and never wake up again.
+  // as, an action is required to clear the INT flag, and allow it to trigger again.
+  // see datasheet for datails.
+  while( ! (mcp.digitalRead(mcpPinB) && mcp.digitalRead(mcpPinA) ));
+  // and clean queued INT signal
+  cleanInterrupts();
+}
+
+// handy for interrupts triggered by buttons
+// normally signal a few due to bouncing issues
+void cleanInterrupts(){
+  EIFR=0x01;
+  awakenByInterrupt=false;
+}  
+
+/**
+ * main routine: sleep the arduino, and wake up on Interrups.
+ * the LowPower library, or similar is required for sleeping, but sleep is simulated here.
+ * It is actually posible to get the MCP to draw only 1uA while in standby as the datasheet claims,
+ * however there is no stadndby mode. Its all down to seting up each pin in a way that current does not flow.
+ * and you can wait for interrupts while waiting.
+ */
+void loop(){
+  
+  // enable interrupts before going to sleep/wait
+  // And we setup a callback for the arduino INT handler.
+  attachInterrupt(arduinoInterrupt,intCallBack,FALLING);
+  
+  // Simulate a deep sleep
+  while(!awakenByInterrupt);
+  // Or sleep the arduino, this lib is great, if you have it.
+  //LowPower.powerDown(SLEEP_1S, ADC_OFF, BOD_OFF);
+  
+  // disable interrupts while handling them.
+  detachInterrupt(arduinoInterrupt);
+  
+  if(awakenByInterrupt) handleInterrupt();
+}
+
+
+

firmware/lib/Adafruit-MCP23017-Arduino-Library-master/examples/toggle/toggle.ino

@@ -0,0 +1,35 @@
+#include <Wire.h>
+#include "Adafruit_MCP23017.h"
+
+// Basic pin reading and pullup test for the MCP23017 I/O expander
+// public domain!
+
+// Connect pin #12 of the expander to Analog 5 (i2c clock)
+// Connect pin #13 of the expander to Analog 4 (i2c data)
+// Connect pins #15, 16 and 17 of the expander to ground (address selection)
+// Connect pin #9 of the expander to 5V (power)
+// Connect pin #10 of the expander to ground (common ground)
+// Connect pin #18 through a ~10kohm resistor to 5V (reset pin, active low)
+
+// Output #0 is on pin 21 so connect an LED or whatever from that to ground
+
+Adafruit_MCP23017 mcp;
+  
+void setup() {  
+  mcp.begin();      // use default address 0
+
+  mcp.pinMode(0, OUTPUT);
+}
+
+
+// flip the pin #0 up and down
+
+void loop() {
+  delay(100);
+
+  mcp.digitalWrite(0, HIGH);
+
+  delay(100);
+
+  mcp.digitalWrite(0, LOW);
+}

firmware/lib/Adafruit-MCP23017-Arduino-Library-master/keywords.txt

@@ -0,0 +1,21 @@
+#######################################
+# Syntax Coloring Map for MCP23017
+#######################################
+
+#######################################
+# Datatypes (KEYWORD1)
+#######################################
+
+MCP23017	KEYWORD1
+
+#######################################
+# Methods and Functions (KEYWORD2)
+#######################################
+
+pullUp	KEYWORD2
+writeGPIOAB	KEYWORD2
+readGPIOAB	KEYWORD2
+
+#######################################
+# Constants (LITERAL1)
+#######################################

firmware/lib/Adafruit-MCP23017-Arduino-Library-master/library.properties

@@ -0,0 +1,9 @@
+name=Adafruit MCP23017 Arduino Library
+version=1.0.3
+author=Adafruit
+maintainer=Adafruit <info@adafruit.com>
+sentence=Library for the MCP23017 I2C Port Expander
+paragraph=Library for the MCP23017 I2C Port Expander
+category=Signal Input/Output
+url=https://github.com/adafruit/Adafruit-MCP23017-Arduino-Library
+architectures=*

firmware/lib/Adafruit-MCP23017-Arduino-Library-master/license.txt

@@ -0,0 +1,26 @@
+Software License Agreement (BSD License)
+
+Copyright (c) 2012, Adafruit Industries
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+1. Redistributions of source code must retain the above copyright
+notice, this list of conditions and the following disclaimer.
+2. Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+3. Neither the name of the copyright holders nor the
+names of its contributors may be used to endorse or promote products
+derived from this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ''AS IS'' AND ANY
+EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE FOR ANY
+DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

firmware/lib/CheapStepper-master/CheapStepper.cpp

@@ -0,0 +1,297 @@
+/*  CheapStepper.cpp - 
+	v0.2
+	Library for the 28BYJ-48 stepper motor, using ULN2003 driver board
+	https://arduino-info.wikispaces.com/SmallSteppers
+
+	Library written by Tyler Henry, 6/2016
+
+	uses 8-step sequence: A-AB-B-BC-C-CD-D-DA
+
+	motor has gear ratio of either:
+		64:1 (per manufacturer specs)
+		or 
+		63.68395:1 measured
+			(see: http://forum.arduino.cc/index.php?topic=71964.15)
+	* 64 steps per internal motor rev
+	= 
+
+	4096 total mini-steps / revolution
+	or ~4076 (4075.7728) depending on exact gear ratio
+
+	assumes 5v power source for rpm calc
+*/
+
+
+#include "Arduino.h"
+#include "CheapStepper.h"
+
+
+CheapStepper::CheapStepper () {
+	for (int pin=0; pin<4; pin++){
+		pinMode(pins[pin], OUTPUT);
+	}
+}
+
+CheapStepper::CheapStepper (int in1, int in2, int in3, int in4) {
+
+	pins[0] = in1;
+	pins[1] = in2;
+	pins[2] = in3;
+	pins[3] = in4;
+	CheapStepper();
+}
+
+void CheapStepper::setRpm (int rpm){
+
+	delay = calcDelay(rpm);
+}
+
+void CheapStepper::move (bool clockwise, int numSteps){
+
+	for (int n=0; n<numSteps; n++){
+		step(clockwise);
+	}
+}
+
+void CheapStepper::moveTo (bool clockwise, int toStep){
+
+	// keep to 0-(totalSteps-1) range
+	if (toStep >= totalSteps) toStep %= totalSteps;
+	else if (toStep < 0) {
+		toStep %= totalSteps; // returns negative if toStep not multiple of totalSteps
+		if (toStep < 0) toStep += totalSteps; // shift into 0-(totalSteps-1) range
+	}
+	while (stepN != toStep){
+		step(clockwise);
+	}
+}
+
+void CheapStepper::moveDegrees (bool clockwise, int deg){
+
+	int nSteps = (unsigned long) deg * totalSteps / 360;
+	move(clockwise, nSteps);
+}
+
+void CheapStepper::moveToDegree (bool clockwise, int deg){
+
+	// keep to 0-359 range
+	if (deg >= 360) deg %= 360;
+	else if (deg < 0) {
+		deg %= 360; // returns negative if deg not multiple of 360
+		if (deg < 0) deg += 360; // shift into 0-359 range
+	}
+
+	int toStep = deg * totalSteps / 360;
+	moveTo (clockwise, toStep);
+}
+
+
+// NON-BLOCKING MOVES
+
+void CheapStepper::newMove (bool clockwise, int numSteps){
+
+	// numSteps sign ignored
+	// stepsLeft signed positive if clockwise, neg if ccw
+
+	if (clockwise) stepsLeft = abs(numSteps);
+	else stepsLeft = -1 * abs(numSteps);
+
+	lastStepTime = micros();
+}
+
+void CheapStepper::newMoveTo (bool clockwise, int toStep){
+
+	// keep toStep in 0-(totalSteps-1) range
+	if (toStep >= totalSteps) toStep %= totalSteps;
+	else if (toStep < 0) {
+		toStep %= totalSteps; // returns negative if toStep not multiple of totalSteps
+		if (toStep < 0) toStep += totalSteps; // shift into 0-(totalSteps-1) range
+	}
+
+	if (clockwise) stepsLeft = abs(toStep - stepN);
+	// clockwise: simple diff, always pos
+	else stepsLeft = -1*(totalSteps - abs(toStep - stepN));
+	// counter-clockwise: totalSteps - diff, made neg
+
+	lastStepTime = micros();
+}
+
+void CheapStepper::newMoveDegrees (bool clockwise, int deg){
+
+	int nSteps = (unsigned long) deg * totalSteps / 360;
+	newMove (clockwise, nSteps);
+}
+
+void CheapStepper::newMoveToDegree (bool clockwise, int deg){
+
+	// keep to 0-359 range
+	if (deg >= 360) deg %= 360;
+	else if (deg < 0) {
+		deg %= 360; // returns negative if deg not multiple of 360
+		if (deg < 0) deg += 360; // shift into 0-359 range
+	}
+
+	int toStep = deg * totalSteps / 360;
+	newMoveTo (clockwise, toStep);
+}
+
+void CheapStepper::run(){
+
+	if (micros() - lastStepTime >= delay) { // if time for step
+		if (stepsLeft > 0) { // clockwise
+			stepCW();
+			stepsLeft--;
+		} else if (stepsLeft < 0){ // counter-clockwise
+			stepCCW();
+			stepsLeft++;
+		} 
+
+		lastStepTime = micros();
+	}
+}
+
+void CheapStepper::stop(){
+
+	stepsLeft = 0;
+}
+
+
+void CheapStepper::step(bool clockwise){
+
+	if (clockwise) seqCW();
+	else seqCCW();
+}
+
+
+/////////////
+// PRIVATE //
+/////////////
+
+int CheapStepper::calcDelay (int rpm){
+
+	if (rpm < 6) return delay; // will overheat, no change
+	else if (rpm >= 24) return 600; // highest speed
+
+	unsigned long d = 60000000 / (totalSteps* (unsigned long) rpm);
+	// in range: 600-1465 microseconds (24-1 rpm)
+	return (int) d;
+
+}
+
+int CheapStepper::calcRpm (int _delay){
+
+	unsigned long rpm = 60000000 / (unsigned long) _delay / totalSteps;
+	return (int) rpm;
+	
+}
+
+void CheapStepper::seqCW (){
+	seqN++;
+	if (seqN > 7) seqN = 0; // roll over to A seq
+	seq(seqN);
+
+	stepN++; // track miniSteps
+	if (stepN >= totalSteps){
+		stepN -=totalSteps; // keep stepN within 0-(totalSteps-1)
+	}
+}
+
+void CheapStepper::seqCCW (){
+	seqN--;
+	if (seqN < 0) seqN = 7; // roll over to DA seq
+	seq(seqN);
+
+	stepN--; // track miniSteps
+	if (stepN < 0){
+		stepN +=totalSteps; // keep stepN within 0-(totalSteps-1)
+	}
+}
+
+void CheapStepper::seq (int seqNum){
+
+	int pattern[4];
+	// A,B,C,D HIGH/LOW pattern to write to driver board
+	
+	switch(seqNum){
+		case 0:
+		{
+			pattern[0] = 1;
+			pattern[1] = 0;
+			pattern[2] = 0;
+			pattern[3] = 0;
+			break;
+		}
+		case 1:
+		{
+			pattern[0] = 1;
+			pattern[1] = 1;
+			pattern[2] = 0;
+			pattern[3] = 0;
+			break;
+		}
+		case 2:
+		{
+			pattern[0] = 0;
+			pattern[1] = 1;
+			pattern[2] = 0;
+			pattern[3] = 0;
+			break;
+		}
+		case 3:
+		{
+			pattern[0] = 0;
+			pattern[1] = 1;
+			pattern[2] = 1;
+			pattern[3] = 0;
+			break;
+		}	
+		case 4:
+		{
+			pattern[0] = 0;
+			pattern[1] = 0;
+			pattern[2] = 1;
+			pattern[3] = 0;
+			break;
+		}
+		case 5:
+		{
+			pattern[0] = 0;
+			pattern[1] = 0;
+			pattern[2] = 1;
+			pattern[3] = 1;
+			break;
+		}
+		case 6:
+		{
+			pattern[0] = 0;
+			pattern[1] = 0;
+			pattern[2] = 0;
+			pattern[3] = 1;
+			break;
+		}
+		case 7:
+		{
+			pattern[0] = 1;
+			pattern[1] = 0;
+			pattern[2] = 0;
+			pattern[3] = 1;
+			break;
+		}
+		default:
+		{
+			pattern[0] = 0;
+			pattern[1] = 0;
+			pattern[2] = 0;
+			pattern[3] = 0;
+			break;
+		}
+	}
+
+	// write pattern to pins
+	for (int p=0; p<4; p++){
+		digitalWrite(pins[p], pattern[p]);
+	}
+	delayMicroseconds(delay);
+}
+
+

firmware/lib/CheapStepper-master/CheapStepper.h

@@ -0,0 +1,128 @@
+/*  CheapStepper.h - 
+	v0.2
+	Library for the 28BYJ-48 stepper motor, using ULN2003 driver board
+	https://arduino-info.wikispaces.com/SmallSteppers
+
+	Library written by Tyler Henry, 6/2016
+
+	uses 8-step sequence: A-AB-B-BC-C-CD-D-DA
+
+	motor has gear ratio of either:
+		64:1 (per manufacturer specs)
+		or 
+		63.68395:1 measured
+			(see: http://forum.arduino.cc/index.php?topic=71964.15)
+	* 64 steps per internal motor rev
+	= 
+
+	4096 total mini-steps / revolution
+	or ~4076 (4075.7728) depending on exact gear ratio
+
+	assumes 5v power source for rpm calc
+*/
+
+#ifndef CHEAPSTEPPER_H
+#define CHEAPSTEPPER_H
+
+#include "Arduino.h"
+
+class CheapStepper
+{
+
+public: 
+	CheapStepper();
+	CheapStepper (int in1, int in2, int in3, int in4);
+
+	void setRpm (int rpm); // sets speed (10-24 rpm, hi-low torque)
+	// <6 rpm blocked in code, may overheat
+	// 23-24rpm may skip
+
+	void set4076StepMode() { totalSteps = 4076; }
+	void setTotalSteps (int numSteps) { totalSteps = numSteps; }
+	// allows custom # of steps (usually 4076)
+
+	// blocking! (pauses arduino until move is done)
+	void move (bool clockwise, int numSteps); // 4096 steps = 1 revolution
+	void moveTo (bool clockwise, int toStep); // move to specific step position
+	void moveDegrees (bool clockwise, int deg);
+	void moveToDegree (bool clockwise, int deg);
+
+	void moveCW (int numSteps) { move (true, numSteps); }
+	void moveCCW (int numSteps) { move (false, numSteps); }
+	void moveToCW (int toStep) { moveTo (true, toStep); }
+	void moveToCCW (int toStep) { moveTo (false, toStep); }
+	void moveDegreesCW (int deg) { moveDegrees (true, deg); }
+	void moveDegreesCCW (int deg) { moveDegrees (false, deg); }
+	void moveToDegreeCW (int deg) { moveToDegree (true, deg); }
+	void moveToDegreeCCW (int deg) { moveToDegree (false, deg); }
+
+
+	// non-blocking versions of move()
+	// call run() in loop to keep moving
+
+	void newMove (bool clockwise, int numSteps);
+	void newMoveTo (bool clockwise, int toStep);
+	void newMoveDegrees (bool clockwise, int deg);
+	void newMoveToDegree (bool clockwise, int deg);
+
+	void run();
+	void stop();
+
+	void newMoveCW(int numSteps) { newMove(true, numSteps); }
+	void newMoveCCW(int numSteps) { newMove(false, numSteps); }
+	void newMoveToCW(int toStep) { newMoveTo(true, toStep); }
+	void newMoveToCCW(int toStep) { newMoveTo(false, toStep); }
+	void newMoveDegreesCW(int deg) { newMoveDegrees(true, deg); }
+	void newMoveDegreesCCW(int deg) { newMoveDegrees(false, deg); }
+	void newMoveToDegreeCW(int deg) { newMoveToDegree(true, deg); }
+	void newMoveToDegreeCCW(int deg) { newMoveToDegree(false, deg); }
+
+
+
+	void step (bool clockwise);
+	// move 1 step clockwise or counter-clockwise
+
+	void stepCW () { step (true); } // move 1 step clockwise
+	void stepCCW () { step (false); } // move 1 step counter-clockwise
+
+	int getStep() { return stepN; } // returns current miniStep position
+	int getDelay() { return delay; } // returns current delay (microseconds)
+	int getRpm() { return calcRpm(); } // returns current rpm
+	int getPin(int p) { 
+		if (p<4) return pins[p]; // returns pin #
+		return 0; // default 0
+	}
+	int getStepsLeft() { return stepsLeft; } // returns steps left in current move
+
+private:
+
+	int calcDelay(int rpm); // calcs microsecond step delay for given rpm
+	int calcRpm(int _delay); // calcs rpm for given delay in microseconds
+	int calcRpm(){
+		return calcRpm(delay); // calcs rpm from current delay
+	}
+
+	void seqCW();
+	void seqCCW();
+	void seq(int seqNum); // send specific sequence num to driver
+
+	int pins[4] = {8,9,10,11}; // in1, in2, in3, in4
+
+	int stepN = 0; // keeps track of step position
+	// 0-4095 (4096 mini-steps / revolution) or maybe 4076...
+	int totalSteps = 4096;
+
+	int delay = 900; // microsecond delay between steps
+	// 900 ~= 16.25 rpm
+	// low speed (high torque) = 1465 ~= 1 rpm
+	// high speed (low torque) = 600 ~=  24 rpm
+
+	int seqN = -1; // keeps track of sequence number
+
+	// variables for non-blocking moves:
+	unsigned long lastStepTime; // time in microseconds that last step happened
+	int stepsLeft = 0; // steps left to move, neg for counter-clockwise
+
+};
+
+#endif

firmware/lib/CheapStepper-master/README.md

@@ -0,0 +1,78 @@
+# CheapStepper v0.2 #
+## An Arduino library for the 28BYJ-48 stepper motor  using ULN2003 driver board ##
+
+#### created by Tyler Henry, 6/2016 ####
+
+
+You can read some more info on the cheap yet worthy 28BYJ-48 stepper motor [here](https://arduino-info.wikispaces.com/SmallSteppers).
+
+## Wiring example
+
+<img src="https://github.com/tyhenry/CheapStepper/blob/master/extras/connections.png?raw=true" width="400">
+
+## Library Info
+
+### Half-stepping
+CheapStepper uses an 8 mini-step sequence to perform all moves  
+([a.k.a half-stepping](https://www.youtube.com/watch?v=B86nqDRskVU&feature=youtu.be&t=11m0s)): A-AB-B-BC-C-CD-D-DA
+
+### Gear Ratio
+Depending on whom you ask, the 28BYJ-48 motor has an internal gear ratio of either:  
+
+- 64:1 (per manufacturer specs)  or  
+- 63.68395:1 (measured... see this [Arduino Forum topic](http://forum.arduino.cc/index.php?topic=71964.15) for more info)
+
+### Total Steps
+
+64:1 gear ratio **\*** 64 steps (1 step = 8 mini-steps) per internal motor revolution =  
+4096 total mini-steps / revolution  
+or ~4076 (4075.7728) if the gear ratio is 63.68395:1  
+  
+CheapStepper library defaults to 4096 mini-steps but you can call:  
+`CheapStepper::set4076StepMode()` to use 4076 steps
+or `CheapStepper::setTotalSteps(int numSteps)` to use a custom amount
+
+
+### Power
+CheapStepper assumes a 5v power source for RPM calculations.  
+It's best to use an external power supply like [this](https://www.adafruit.com/products/276), wired directly to the ULN2003 driver board, rather than draw from the Arduino's onboard power, which may have insufficient amperage (>100mA needed).
+
+----
+## Blocking Moves
+_The Arduino sketch "pauses" during move()_
+
+- move (boolean clockwise, int numSteps);
+- moveTo (boolean clockwise, int toStep);
+- moveDegrees (boolean clockwise, int degrees);
+- moveToDegree (boolean clockwise, int toDegree);
+
+----
+## Non-blocking Moves 
+_The Arduino sketch will continue running during the move.  
+You must call run() on your stepper during loop()_  
+
+- newMove (boolean clockwise, int numSteps);
+- newMoveTo (boolean clockwise, int toStep);
+- newMoveDegrees (boolean clockwise, int degrees);  
+- newMoveToDegree (boolean clockwise, int toDegree);  
+
+### Note
+* must call run() during loop to continue move
+* call stop() to cancel/end move
+
+----
+### Move a Single Mini-Step<br/>(1/8 of 8 Step Sequence)
+
+- step (boolean clockwise);
+- or stepCW(); or stepCCW();
+
+----
+#### All move functions have ...CW() or ...CCW() variants:  
+e.g.  
+ 
+- move 8 steps clockwise:  
+  `move (true, 8);`  is the same as   
+  `moveCW (8);` 
+- create new move of 90 degrees counter-clockwise  
+  `newMoveDegrees (false, 90);`  is the same as  
+  `newMoveDegreesCCW (90);`

firmware/lib/CheapStepper-master/examples/cheapStepper_move/cheapStepper_move.ino

@@ -0,0 +1,126 @@
+/*
+ * cheapStepper_move.ino
+ * ///////////////////////////////////////////
+ * using CheapStepper Arduino library v.0.2.0
+ * created by Tyler Henry, 7/2016
+ * ///////////////////////////////////////////
+ * 
+ * This sketch illustrates the library's
+ * "blocking" move functions -
+ * i.e. the move will "pause" the arduino sketch
+ * -- for non-blocking moves, see cheapStepper_newMoveTo.ino example
+ * 
+ * This sketch also shows how to set the RPM
+ * and shows a few different types of move functions
+ * - by steps or by degrees.
+ * 
+ * Blocking moves are useful if you need a specific RPM
+ * but don't need your arduino to perform other functions
+ * while the stepper is moving.
+ * 
+ * //////////////////////////////////////////////////////
+ */
+
+// first, include the library :)
+
+#include <CheapStepper.h>
+
+// next, declare the stepper
+// and connect pins 8,9,10,11 to IN1,IN2,IN3,IN4 on ULN2003 board
+
+CheapStepper stepper (8,9,10,11); 
+
+ // let's create a boolean variable to save the direction of our rotation
+
+boolean moveClockwise = true;
+
+
+void setup() {
+
+  // let's set a custom speed of 20rpm (the default is ~16.25rpm)
+  
+  stepper.setRpm(20); 
+  /* Note: CheapStepper library assumes you are powering your 28BYJ-48 stepper
+   * using an external 5V power supply (>100mA) for RPM calculations
+   * -- don't try to power the stepper directly from the Arduino
+   * 
+   * accepted RPM range: 6RPM (may overheat) - 24RPM (may skip)
+   * ideal range: 10RPM (safe, high torque) - 22RPM (fast, low torque)
+   */
+
+  // now let's set up a serial connection and print some stepper info to the console
+  
+  Serial.begin(9600); Serial.println();
+  Serial.print(stepper.getRpm()); // get the RPM of the stepper
+  Serial.print(" rpm = delay of ");
+  Serial.print(stepper.getDelay()); // get delay between steps for set RPM
+  Serial.print(" microseconds between steps");
+  Serial.println();
+  
+  // stepper.setTotalSteps(4076);
+  /* you can uncomment the above line if you think your motor
+   * is geared 63.68395:1 (measured) rather than 64:1 (advertised)
+   * which would make the total steps 4076 (rather than default 4096)
+   * for more info see: http://forum.arduino.cc/index.php?topic=71964.15
+   */
+}
+
+void loop() {
+
+    // let's do a clockwise move first
+  
+    moveClockwise = true;
+
+    // let's move the stepper clockwise to position 2048
+    // which is 180 degrees, a half-turn (if using default of 4096 total steps)
+    
+    stepper.moveTo (moveClockwise, 2048);
+
+    // now let's print the stepper position to the console
+    
+    Serial.print("step position: ");  
+    Serial.print(stepper.getStep()); // get the current step position
+    Serial.print(" / 4096");
+    Serial.println();
+
+    // now let's wait one second
+    
+    delay(1000); // wait a sec
+
+    // and now let's move another 90 degrees (a quarter-turn) clockwise
+
+    stepper.moveDegrees (moveClockwise, 90);
+    // stepper.moveDegreesCW (90); <--- another way to do a clockwise 90 degree turn
+
+    // let's print the stepper position to the console again
+    
+    Serial.print("step position: ");
+    Serial.print(stepper.getStep());
+    Serial.print(" / 4096");
+    Serial.println();
+
+    // and wait another second
+    
+    delay(1000);
+
+    // ok, now let's reverse directions (to counter-clockwise)
+    
+    moveClockwise = false;
+
+    // and move back to the start position (0 degree)
+   
+    stepper.moveToDegree (moveClockwise, 0);
+    // moveClockwise is now false, so move counter-clockwise back to start
+
+    // let's print the position to the console once again
+    
+    Serial.print("step position: ");
+    Serial.print(stepper.getStep());
+    Serial.print(" / 4096");
+    Serial.println();
+
+    // and wait another second before starting loop() over
+    
+    delay(1000);  
+}
+

firmware/lib/CheapStepper-master/examples/cheapStepper_newMoveTo/cheapStepper_newMoveTo.ino

@@ -0,0 +1,110 @@
+
+/*
+ * cheapStepper_newMoveTo.ino
+ * ///////////////////////////////////////////
+ * using CheapStepper Arduino library v.0.2.0
+ * created by Tyler Henry, 7/2016
+ * ///////////////////////////////////////////
+ * 
+ * This sketch illustrates the library's
+ * "non-blocking" move functions -
+ * i.e. you can perform moves with the stepper over time
+ * while still running other code in your loop()
+ * 
+ * This can be useful if your Arduino is multi-tasking,
+ * but be careful: if the other code in your loop()
+ * slows down your Arduino, the stepper motor may
+ * slow down or move with a stutter
+ * 
+ * //////////////////////////////////////////////////////
+ */
+
+// first, include the library :)
+
+#include <CheapStepper.h>
+
+// next, declare the stepper
+// and connect pins 8,9,10,11 to IN1,IN2,IN3,IN4 on ULN2003 board
+
+CheapStepper stepper (8,9,10,11);  
+
+
+ // let's also create a boolean variable to save the direction of our rotation
+ // and a timer variable to keep track of move times
+
+bool moveClockwise = true;
+unsigned long moveStartTime = 0; // this will save the time (millis()) when we started each new move
+
+
+void setup() {
+
+  // let's run the stepper at 12rpm (if using 5V power) - the default is ~16 rpm
+
+  stepper.setRpm(12);
+
+  // let's print out the RPM to make sure the setting worked
+  
+  Serial.begin(9600);
+  Serial.print("stepper RPM: "); Serial.print(stepper.getRpm());
+  Serial.println();
+
+  // and let's print the delay time (in microseconds) between each step
+  // the delay is based on the RPM setting:
+  // it's how long the stepper will wait before each step
+
+  Serial.print("stepper delay (micros): "); Serial.print(stepper.getDelay());
+  Serial.println(); Serial.println();
+
+  // now let's set up our first move...
+  // let's move a half rotation from the start point
+
+  stepper.newMoveTo(moveClockwise, 2048);
+  /* this is the same as: 
+   * stepper.newMoveToDegree(clockwise, 180);
+   * because there are 4096 (default) steps in a full rotation
+   */
+  moveStartTime = millis(); // let's save the time at which we started this move
+  
+}
+
+void loop() {
+
+  // we need to call run() during loop() 
+  // in order to keep the stepper moving
+  // if we are using non-blocking moves
+  
+  stepper.run();
+
+  ////////////////////////////////
+  // now the stepper is moving, //
+  // let's do some other stuff! //
+  ////////////////////////////////
+
+  // let's check how many steps are left in the current move:
+  
+  int stepsLeft = stepper.getStepsLeft();
+
+  // if the current move is done...
+  
+  if (stepsLeft == 0){
+
+    // let's print the position of the stepper to serial
+    
+    Serial.print("stepper position: "); Serial.print(stepper.getStep());
+    Serial.println();
+
+    // and now let's print the time the move took
+
+    unsigned long timeTook = millis() - moveStartTime; // calculate time elapsed since move start
+    Serial.print("move took (ms): "); Serial.print(timeTook);
+    Serial.println(); Serial.println();
+    
+    // let's start a new move in the reverse direction
+    
+    moveClockwise = !moveClockwise; // reverse direction
+    stepper.newMoveDegrees (moveClockwise, 180); // move 180 degrees from current position
+    moveStartTime = millis(); // reset move start time
+
+  }
+
+}

firmware/lib/CheapStepper-master/examples/cheapStepper_simple/cheapStepper_simple.ino

@@ -0,0 +1,90 @@
+/*
+ * cheapStepper_simple.ino
+ * ///////////////////////////////////////////
+ * using CheapStepper Arduino library v.0.2.0
+ * created by Tyler Henry, 7/2016
+ * ///////////////////////////////////////////
+ * 
+ * this sketch illustrates basic step() functionality of the library:
+ * the stepper performs a full rotation, pauses 1 second,
+ * then does a full rotation in the other direction, and so on
+ * 
+ * //////////////////////////////////////////////////////
+ */
+
+// first, include the library :)
+
+#include <CheapStepper.h>
+
+
+CheapStepper stepper;
+// here we declare our stepper using default pins:
+// arduino pin <--> pins on ULN2003 board:
+// 8 <--> IN1
+// 9 <--> IN2
+// 10 <--> IN3
+// 11 <--> IN4
+
+ // let's create a boolean variable to save the direction of our rotation
+
+boolean moveClockwise = true;
+
+
+void setup() {
+  
+  // let's just set up a serial connection and test print to the console
+  
+  Serial.begin(9600);
+  Serial.println("Ready to start moving!");
+}
+
+void loop() {
+
+  // let's move a full rotation (4096 mini-steps)
+  // we'll go step-by-step using the step() function
+  
+  for (int s=0; s<4096; s++){
+    // this will loop 4096 times
+    // 4096 steps = full rotation using default values
+    /* Note:
+     * you could alternatively use 4076 steps... 
+     * if you think your 28BYJ-48 stepper's internal gear ratio is 63.68395:1 (measured) rather than 64:1 (advertised)
+     * for more info, see: http://forum.arduino.cc/index.php?topic=71964.15)
+     */
+
+    // let's move one "step" (of the 4096 per full rotation)
+    
+    stepper.step(moveClockwise);
+    /* the direction is based on moveClockwise boolean:
+     * true for clockwise, false for counter-clockwise
+     * -- you could also say stepper.stepCW(); or stepper.stepCCW();
+     */
+
+    // now let's get the current step position of motor
+    
+    int nStep = stepper.getStep();
+
+    // and if it's divisible by 64...
+    
+    if (nStep%64==0){ 
+
+      // let's print the position to the console
+      
+      Serial.print("current step position: "); Serial.print(nStep);
+      Serial.println();
+      
+    }
+  }
+
+  // now we've moved 4096 steps
+  
+  // let's wait one second
+  
+  delay(1000);
+
+  // and switch directions before starting loop() again
+  
+  moveClockwise = !moveClockwise;
+}
+
+

firmware/lib/CheapStepper-master/extras/fritzing parts/license.txt

@@ -0,0 +1,27 @@
+28BYJ-49 Stepper Motor.fzpz
+X113647 Stepper Driver Board.fzpz
+Fritzing parts from https://github.com/tardate/X113647Stepper
+
+Copyright (c) 2014 Paul Gallagher
+
+MIT License
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+

firmware/lib/CheapStepper-master/keywords.txt

@@ -0,0 +1,56 @@
+#######################################
+# Syntax Coloring Map For CheapStepper
+#######################################
+
+#######################################
+# Datatypes (KEYWORD1)
+#######################################
+
+CheapStepper	KEYWORD1
+
+#######################################
+# Methods and Functions (KEYWORD2)
+#######################################
+
+setRpm			KEYWORD2
+set4076StepMode	KEYWORD2
+setTotalSteps	KEYWORD2
+move			KEYWORD2
+moveTo			KEYWORD2
+moveDegrees		KEYWORD2
+moveToDegree	KEYWORD2
+moveCW			KEYWORD2
+moveCCW			KEYWORD2
+moveToCW		KEYWORD2
+moveToCCW		KEYWORD2
+moveDegreesCW	KEYWORD2
+moveDegreesCCW	KEYWORD2
+moveToDegreeCW	KEYWORD2
+moveToDegreeCCW	KEYWORD2
+newMove			KEYWORD2
+newMoveTo		KEYWORD2
+newMoveDegrees	KEYWORD2
+newMoveToDegree	KEYWORD2
+run				KEYWORD2
+stop 			KEYWORD2
+newMoveCW		KEYWORD2
+newMoveCCW		KEYWORD2
+newMoveToCW		KEYWORD2
+newMoveToCCW	KEYWORD2
+newMoveDegreesCW	KEYWORD2
+newMoveDegreesCCW	KEYWORD2
+newMoveToDegreeCW	KEYWORD2
+newMoveToDegreeCCW	KEYWORD2
+step 			KEYWORD2
+stepCW			KEYWORD2
+stepCCW			KEYWORD2
+getStep			KEYWORD2
+getDelay		KEYWORD2
+getRpm			KEYWORD2
+getPin			KEYWORD2
+getStepsLeft	KEYWORD2
+
+#######################################
+# Constants (LITERAL1)
+#######################################
+

firmware/lib/CheapStepper-master/library.properties

@@ -0,0 +1,9 @@
+name=CheapStepper
+version=0.2
+author=Tyler Henry
+maintainer=Tyler Henry <tyler@tylerhenry.com>
+sentence=A library for the cheap but useful 28BYJ-48 5v stepper motor with ULN2003 driver board
+paragraph=Library uses half-stepping for fine control (default: 4096 mini-steps per rotation), and supports blocking and non-blocking moves. The total number of steps is also adjustable (e.g. 4076 steps for 63.68395:1 measured gear ratio).
+category=Device Control
+url=https://github.com/tyhenry/CheapStepper
+architectures=*

firmware/lib/CheapStepper-master/license.txt

@@ -0,0 +1,674 @@
+                    GNU GENERAL PUBLIC LICENSE
+                       Version 3, 29 June 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
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+
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firmware/lib/Rtc-master/.gitattributes

@@ -0,0 +1,17 @@
+# Auto detect text files and perform LF normalization
+* text=auto
+
+# Custom for Visual Studio
+*.cs     diff=csharp
+
+# Standard to msysgit
+*.doc	 diff=astextplain
+*.DOC	 diff=astextplain
+*.docx diff=astextplain
+*.DOCX diff=astextplain
+*.dot  diff=astextplain
+*.DOT  diff=astextplain
+*.pdf  diff=astextplain
+*.PDF	 diff=astextplain
+*.rtf	 diff=astextplain
+*.RTF	 diff=astextplain

firmware/lib/Rtc-master/.gitignore

@@ -0,0 +1,43 @@
+# Windows image file caches
+Thumbs.db
+ehthumbs.db
+
+# Folder config file
+Desktop.ini
+
+# Recycle Bin used on file shares
+$RECYCLE.BIN/
+
+# Windows Installer files
+*.cab
+*.msi
+*.msm
+*.msp
+
+# Windows shortcuts
+*.lnk
+
+# =========================
+# Operating System Files
+# =========================
+
+# OSX
+# =========================
+
+.DS_Store
+.AppleDouble
+.LSOverride
+
+# Thumbnails
+._*
+
+# Files that might appear on external disk
+.Spotlight-V100
+.Trashes
+
+# Directories potentially created on remote AFP share
+.AppleDB
+.AppleDesktop
+Network Trash Folder
+Temporary Items
+.apdisk

firmware/lib/Rtc-master/COPYING

@@ -0,0 +1,165 @@
+                   GNU LESSER GENERAL PUBLIC LICENSE
+                       Version 3, 29 June 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+
+  This version of the GNU Lesser General Public License incorporates
+the terms and conditions of version 3 of the GNU General Public
+License, supplemented by the additional permissions listed below.
+
+  0. Additional Definitions.
+
+  As used herein, "this License" refers to version 3 of the GNU Lesser
+General Public License, and the "GNU GPL" refers to version 3 of the GNU
+General Public License.
+
+  "The Library" refers to a covered work governed by this License,
+other than an Application or a Combined Work as defined below.
+
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+
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+permanent authorization for you to choose that version for the
+Library.

firmware/lib/Rtc-master/README.md

@@ -0,0 +1,25 @@
+# Rtc
+
+Arduino Real Time Clock library.  
+An RTC library with deep device support.
+
+[![Donate](http://img.shields.io/paypal/donate.png?color=yellow)](https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&hosted_button_id=6AA97KE54UJR4)
+
+Now supports esp8266.
+Now supports SoftwareWire library.
+
+For quick questions jump on Gitter and ask away.  
+[![Gitter](https://badges.gitter.im/Join%20Chat.svg)](https://gitter.im/Makuna/Rtc?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge)
+
+For bugs, make sure there isn't an active issue and then create one.
+
+## Documentation
+[See Wiki](https://github.com/Makuna/Rtc/wiki)
+
+## Installing This Library (prefered, you just want to use it)
+Open the Library Manager and search for "Rtc by Makuna" and install
+
+## Installing This Library From GitHub (advanced, you want to contribute)
+Create a directory in your Arduino\Library folder named "Rtc"
+Clone (Git) this project into that folder.  
+It should now show up in the import list when you restart Arduino IDE.

firmware/lib/Rtc-master/examples/DS1307_Memory/DS1307_Memory.ino

@@ -0,0 +1,151 @@
+
+// CONNECTIONS:
+// DS1307 SDA --> SDA
+// DS1307 SCL --> SCL
+// DS1307 VCC --> 5v
+// DS1307 GND --> GND
+
+#define countof(a) (sizeof(a) / sizeof(a[0]))
+
+/* for software wire use below
+#include <SoftwareWire.h>  // must be included here so that Arduino library object file references work
+#include <RtcDS1307.h>
+
+SoftwareWire myWire(SDA, SCL);
+RtcDS1307<SoftwareWire> Rtc(myWire);
+ for software wire use above */
+
+/* for normal hardware wire use below */
+#include <Wire.h> // must be included here so that Arduino library object file references work
+#include <RtcDS1307.h>
+RtcDS1307<TwoWire> Rtc(Wire);
+/* for normal hardware wire use above */
+
+
+const char data[] = "what time is it";
+
+void setup () 
+{
+    Serial.begin(57600);
+
+    Serial.print("compiled: ");
+    Serial.print(__DATE__);
+    Serial.println(__TIME__);
+
+    //--------RTC SETUP ------------
+    // if you are using ESP-01 then uncomment the line below to reset the pins to
+    // the available pins for SDA, SCL
+    // Wire.begin(0, 2); // due to limited pins, use pin 0 and 2 for SDA, SCL
+    
+    Rtc.Begin();
+
+    RtcDateTime compiled = RtcDateTime(__DATE__, __TIME__);
+    printDateTime(compiled);
+    Serial.println();
+
+    if (!Rtc.IsDateTimeValid()) 
+    {
+        Serial.println("RTC lost confidence in the DateTime!");
+        Rtc.SetDateTime(compiled);
+    }
+
+    if (!Rtc.GetIsRunning())
+    {
+        Serial.println("RTC was not actively running, starting now");
+        Rtc.SetIsRunning(true);
+    }
+
+    RtcDateTime now = Rtc.GetDateTime();
+    if (now < compiled) 
+    {
+        Serial.println("RTC is older than compile time!  (Updating DateTime)");
+        Rtc.SetDateTime(compiled);
+    }
+
+    // never assume the Rtc was last configured by you, so
+    // just clear them to your needed state
+    Rtc.SetSquareWavePin(DS1307SquareWaveOut_Low); 
+
+/* comment out on a second run to see that the info is stored long term */
+    // Store something in memory on the RTC
+    Rtc.SetMemory(0, 13);
+    uint8_t written = Rtc.SetMemory(13, (const uint8_t*)data, sizeof(data) - 1); // remove the null terminator strings add
+    Rtc.SetMemory(1, written);
+/* end of comment out section */
+}
+
+void loop () 
+{
+    if (!Rtc.IsDateTimeValid()) 
+    {
+        // Common Cuases:
+        //    1) the battery on the device is low or even missing and the power line was disconnected
+        Serial.println("RTC lost confidence in the DateTime!");
+    }
+
+    RtcDateTime now = Rtc.GetDateTime();
+
+    printDateTime(now);
+    Serial.println();
+
+    delay(5000);
+
+    // read data
+
+    // get the offset we stored our data from address zero
+    uint8_t address = Rtc.GetMemory(0);
+    if (address != 13)
+    {
+        Serial.println("address didn't match");
+    }
+    else
+    {
+        // get the size of the data from address 1
+        uint8_t count = Rtc.GetMemory(1);
+        uint8_t buff[20];
+
+        // get our data from the address with the given size
+        uint8_t gotten = Rtc.GetMemory(address, buff, count);
+
+        if (gotten != count ||
+            count != sizeof(data) - 1) // remove the extra null terminator strings add
+        {
+            Serial.print("something didn't match, count = ");
+            Serial.print(count, DEC);
+            Serial.print(", gotten = ");
+            Serial.print(gotten, DEC);
+            Serial.println();
+        }
+        Serial.print("data read (");
+        Serial.print(gotten);
+        Serial.print(") = \"");
+        while (gotten > 0)
+        {
+            Serial.print((char)buff[count - gotten]);
+            gotten--;
+        }
+        Serial.println("\"");
+    }
+
+    
+    delay(5000);
+}
+
+
+
+void printDateTime(const RtcDateTime& dt)
+{
+    char datestring[20];
+
+    snprintf_P(datestring, 
+            countof(datestring),
+            PSTR("%02u/%02u/%04u %02u:%02u:%02u"),
+            dt.Month(),
+            dt.Day(),
+            dt.Year(),
+            dt.Hour(),
+            dt.Minute(),
+            dt.Second() );
+    Serial.print(datestring);
+}
+

firmware/lib/Rtc-master/examples/DS1307_Simple/DS1307_Simple.ino

@@ -0,0 +1,116 @@
+
+// CONNECTIONS:
+// DS1307 SDA --> SDA
+// DS1307 SCL --> SCL
+// DS1307 VCC --> 5v
+// DS1307 GND --> GND
+
+/* for software wire use below
+#include <SoftwareWire.h>  // must be included here so that Arduino library object file references work
+#include <RtcDS1307.h>
+
+SoftwareWire myWire(SDA, SCL);
+RtcDS1307<SoftwareWire> Rtc(myWire);
+ for software wire use above */
+
+/* for normal hardware wire use below */
+#include <Wire.h> // must be included here so that Arduino library object file references work
+#include <RtcDS1307.h>
+RtcDS1307<TwoWire> Rtc(Wire);
+/* for normal hardware wire use above */
+
+void setup () 
+{
+    Serial.begin(57600);
+
+    Serial.print("compiled: ");
+    Serial.print(__DATE__);
+    Serial.println(__TIME__);
+
+    //--------RTC SETUP ------------
+    // if you are using ESP-01 then uncomment the line below to reset the pins to
+    // the available pins for SDA, SCL
+    // Wire.begin(0, 2); // due to limited pins, use pin 0 and 2 for SDA, SCL
+    
+    Rtc.Begin();
+
+    RtcDateTime compiled = RtcDateTime(__DATE__, __TIME__);
+    printDateTime(compiled);
+    Serial.println();
+
+    if (!Rtc.IsDateTimeValid()) 
+    {
+        // Common Cuases:
+        //    1) first time you ran and the device wasn't running yet
+        //    2) the battery on the device is low or even missing
+
+        Serial.println("RTC lost confidence in the DateTime!");
+
+        // following line sets the RTC to the date & time this sketch was compiled
+        // it will also reset the valid flag internally unless the Rtc device is
+        // having an issue
+
+        Rtc.SetDateTime(compiled);
+    }
+
+    if (!Rtc.GetIsRunning())
+    {
+        Serial.println("RTC was not actively running, starting now");
+        Rtc.SetIsRunning(true);
+    }
+
+    RtcDateTime now = Rtc.GetDateTime();
+    if (now < compiled) 
+    {
+        Serial.println("RTC is older than compile time!  (Updating DateTime)");
+        Rtc.SetDateTime(compiled);
+    }
+    else if (now > compiled) 
+    {
+        Serial.println("RTC is newer than compile time. (this is expected)");
+    }
+    else if (now == compiled) 
+    {
+        Serial.println("RTC is the same as compile time! (not expected but all is fine)");
+    }
+
+    // never assume the Rtc was last configured by you, so
+    // just clear them to your needed state
+    Rtc.SetSquareWavePin(DS1307SquareWaveOut_Low); 
+}
+
+void loop () 
+{
+    if (!Rtc.IsDateTimeValid()) 
+    {
+        // Common Cuases:
+        //    1) the battery on the device is low or even missing and the power line was disconnected
+        Serial.println("RTC lost confidence in the DateTime!");
+    }
+
+    RtcDateTime now = Rtc.GetDateTime();
+
+    printDateTime(now);
+    Serial.println();
+
+    delay(10000); // ten seconds
+}
+
+#define countof(a) (sizeof(a) / sizeof(a[0]))
+
+void printDateTime(const RtcDateTime& dt)
+{
+    char datestring[20];
+
+    snprintf_P(datestring, 
+            countof(datestring),
+            PSTR("%02u/%02u/%04u %02u:%02u:%02u"),
+            dt.Month(),
+            dt.Day(),
+            dt.Year(),
+            dt.Hour(),
+            dt.Minute(),
+            dt.Second() );
+    Serial.print(datestring);
+}
+

firmware/lib/Rtc-master/examples/DS3231_Alarms/DS3231_Alarms.ino

@@ -0,0 +1,185 @@
+
+// CONNECTIONS:
+// DS3231 SDA --> SDA
+// DS3231 SCL --> SCL
+// DS3231 VCC --> 3.3v or 5v
+// DS3231 GND --> GND
+// SQW --->  (Pin19) Don't forget to pullup (4.7k to 10k to VCC)
+
+/* for software wire use below
+#include <SoftwareWire.h>  // must be included here so that Arduino library object file references work
+#include <RtcDS3231.h>
+
+SoftwareWire myWire(SDA, SCL);
+RtcDS3231<SoftwareWire> Rtc(myWire);
+ for software wire use above */
+
+/* for normal hardware wire use below */
+#include <Wire.h> // must be included here so that Arduino library object file references work
+#include <RtcDS3231.h>
+RtcDS3231<TwoWire> Rtc(Wire);
+/* for normal hardware wire use above */
+
+
+// Interrupt Pin Lookup Table
+// (copied from Arduino Docs)
+//
+// CAUTION:  The interrupts are Arduino numbers NOT Atmel numbers
+//   and may not match (example, Mega2560 int.4 is actually Atmel Int2)
+//   this is only an issue if you plan to use the lower level interupt features
+//
+// Board           int.0    int.1   int.2   int.3   int.4   int.5
+// ---------------------------------------------------------------
+// Uno, Ethernet    2       3
+// Mega2560         2       3       21      20     [19]      18 
+// Leonardo         3       2       0       1       7
+
+#define RtcSquareWavePin 19 // Mega2560
+#define RtcSquareWaveInterrupt 4 // Mega2560
+
+// marked volatile so interrupt can safely modify them and
+// other code can safely read and modify them
+volatile uint16_t interuptCount = 0;
+volatile bool interuptFlag = false;
+
+void InteruptServiceRoutine()
+{
+    // since this interupted any other running code,
+    // don't do anything that takes long and especially avoid
+    // any communications calls within this routine
+    interuptCount++;
+    interuptFlag = true;
+}
+
+void setup () 
+{
+    Serial.begin(57600);
+
+    // set the interupt pin to input mode
+    pinMode(RtcSquareWavePin, INPUT);
+
+    //--------RTC SETUP ------------
+    // if you are using ESP-01 then uncomment the line below to reset the pins to
+    // the available pins for SDA, SCL
+    // Wire.begin(0, 2); // due to limited pins, use pin 0 and 2 for SDA, SCL
+    
+    Rtc.Begin();
+
+    RtcDateTime compiled = RtcDateTime(__DATE__, __TIME__);
+
+    if (!Rtc.IsDateTimeValid()) 
+    {
+        Serial.println("RTC lost confidence in the DateTime!");
+        Rtc.SetDateTime(compiled);
+    }
+
+    if (!Rtc.GetIsRunning())
+    {
+        Serial.println("RTC was not actively running, starting now");
+        Rtc.SetIsRunning(true);
+    }
+
+    RtcDateTime now = Rtc.GetDateTime();
+    if (now < compiled) 
+    {
+        Serial.println("RTC is older than compile time!  (Updating DateTime)");
+        Rtc.SetDateTime(compiled);
+    }
+    
+    Rtc.Enable32kHzPin(false);
+    Rtc.SetSquareWavePin(DS3231SquareWavePin_ModeAlarmBoth); 
+
+    // Alarm 1 set to trigger every day when 
+    // the hours, minutes, and seconds match
+    RtcDateTime alarmTime = now + 88; // into the future
+    DS3231AlarmOne alarm1(
+            alarmTime.Day(),
+            alarmTime.Hour(),
+            alarmTime.Minute(), 
+            alarmTime.Second(),
+            DS3231AlarmOneControl_HoursMinutesSecondsMatch);
+    Rtc.SetAlarmOne(alarm1);
+
+    // Alarm 2 set to trigger at the top of the minute
+    DS3231AlarmTwo alarm2(
+            0,
+            0,
+            0, 
+            DS3231AlarmTwoControl_OncePerMinute);
+    Rtc.SetAlarmTwo(alarm2);
+
+    // throw away any old alarm state before we ran
+    Rtc.LatchAlarmsTriggeredFlags();
+
+    // setup external interupt 
+    attachInterrupt(RtcSquareWaveInterrupt, InteruptServiceRoutine, FALLING);
+}
+
+void loop () 
+{
+    if (!Rtc.IsDateTimeValid()) 
+    {
+        Serial.println("RTC lost confidence in the DateTime!");
+    }
+
+    RtcDateTime now = Rtc.GetDateTime();
+
+    printDateTime(now);
+    Serial.println();
+
+    // we only want to show time every 10 seconds
+    // but we want to show responce to the interupt firing
+    for (int timeCount = 0; timeCount < 20; timeCount++)
+    {
+        if (Alarmed())
+        {
+            Serial.print(">>Interupt Count: ");
+            Serial.print(interuptCount);
+            Serial.println("<<");
+        }
+        delay(500);
+    }
+}
+
+bool Alarmed()
+{
+    bool wasAlarmed = false;
+    if (interuptFlag)  // check our flag that gets sets in the interupt
+    {
+        wasAlarmed = true;
+        interuptFlag = false; // reset the flag
+        
+        // this gives us which alarms triggered and
+        // then allows for others to trigger again
+        DS3231AlarmFlag flag = Rtc.LatchAlarmsTriggeredFlags();
+
+        if (flag & DS3231AlarmFlag_Alarm1)
+        {
+            Serial.println("alarm one triggered");
+        }
+        if (flag & DS3231AlarmFlag_Alarm2)
+        {
+            Serial.println("alarm two triggered");
+        }
+    }
+    return wasAlarmed;
+}
+
+#define countof(a) (sizeof(a) / sizeof(a[0]))
+
+void printDateTime(const RtcDateTime& dt)
+{
+	char datestring[20];
+
+	snprintf_P(datestring, 
+			countof(datestring),
+			PSTR("%02u/%02u/%04u %02u:%02u:%02u"),
+			dt.Month(),
+			dt.Day(),
+			dt.Year(),
+			dt.Hour(),
+			dt.Minute(),
+			dt.Second() );
+    Serial.print(datestring);
+}
+

firmware/lib/Rtc-master/examples/DS3231_Alarms/DS3231_Alarms.vcxproj

@@ -0,0 +1,71 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project DefaultTargets="Build" ToolsVersion="12.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <ItemGroup Label="ProjectConfigurations">
+    <ProjectConfiguration Include="Debug|Win32">
+      <Configuration>Debug</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|Win32">
+      <Configuration>Release</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+  </ItemGroup>
+  <PropertyGroup Label="Globals">
+    <ProjectGuid>{969D9575-C911-4B46-BC8C-88C6A9086115}</ProjectGuid>
+    <RootNamespace>DS3231_Alarms</RootNamespace>
+  </PropertyGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <UseDebugLibraries>true</UseDebugLibraries>
+    <PlatformToolset>v120</PlatformToolset>
+    <CharacterSet>MultiByte</CharacterSet>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <UseDebugLibraries>false</UseDebugLibraries>
+    <PlatformToolset>v120</PlatformToolset>
+    <WholeProgramOptimization>true</WholeProgramOptimization>
+    <CharacterSet>MultiByte</CharacterSet>
+  </PropertyGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
+  <ImportGroup Label="ExtensionSettings">
+  </ImportGroup>
+  <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+  </ImportGroup>
+  <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+  </ImportGroup>
+  <PropertyGroup Label="UserMacros" />
+  <PropertyGroup />
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
+    <ClCompile>
+      <WarningLevel>Level3</WarningLevel>
+      <Optimization>Disabled</Optimization>
+      <SDLCheck>true</SDLCheck>
+    </ClCompile>
+    <Link>
+      <GenerateDebugInformation>true</GenerateDebugInformation>
+    </Link>
+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
+    <ClCompile>
+      <WarningLevel>Level3</WarningLevel>
+      <Optimization>MaxSpeed</Optimization>
+      <FunctionLevelLinking>true</FunctionLevelLinking>
+      <IntrinsicFunctions>true</IntrinsicFunctions>
+      <SDLCheck>true</SDLCheck>
+    </ClCompile>
+    <Link>
+      <GenerateDebugInformation>true</GenerateDebugInformation>
+      <EnableCOMDATFolding>true</EnableCOMDATFolding>
+      <OptimizeReferences>true</OptimizeReferences>
+    </Link>
+  </ItemDefinitionGroup>
+  <ItemGroup>
+  </ItemGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
+  <ImportGroup Label="ExtensionTargets">
+  </ImportGroup>
+</Project>

firmware/lib/Rtc-master/examples/DS3231_Alarms/DS3231_Alarms.vcxproj.filters

@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <ItemGroup>
+    <Filter Include="Source Files">
+      <UniqueIdentifier>{4FC737F1-C7A5-4376-A066-2A32D752A2FF}</UniqueIdentifier>
+      <Extensions>cpp;c;cc;cxx;def;odl;idl;hpj;bat;asm;asmx</Extensions>
+    </Filter>
+    <Filter Include="Header Files">
+      <UniqueIdentifier>{93995380-89BD-4b04-88EB-625FBE52EBFB}</UniqueIdentifier>
+      <Extensions>h;hh;hpp;hxx;hm;inl;inc;xsd</Extensions>
+    </Filter>
+    <Filter Include="Resource Files">
+      <UniqueIdentifier>{67DA6AB6-F800-4c08-8B7A-83BB121AAD01}</UniqueIdentifier>
+      <Extensions>rc;ico;cur;bmp;dlg;rc2;rct;bin;rgs;gif;jpg;jpeg;jpe;resx;tiff;tif;png;wav;mfcribbon-ms</Extensions>
+    </Filter>
+  </ItemGroup>
+</Project>

firmware/lib/Rtc-master/examples/DS3231_Alarms/Visual Micro/.DS3231_Alarms.vsarduino.h

@@ -0,0 +1,82 @@
+/* 
+	Editor: http://www.visualmicro.com
+	        visual micro and the arduino ide ignore this code during compilation. this code is automatically maintained by visualmicro, manual changes to this file will be overwritten
+	        the contents of the Visual Micro sketch sub folder can be deleted prior to publishing a project
+	        all non-arduino files created by visual micro and all visual studio project or solution files can be freely deleted and are not required to compile a sketch (do not delete your own code!).
+	        note: debugger breakpoints are stored in '.sln' or '.asln' files, knowledge of last uploaded breakpoints is stored in the upload.vmps.xml file. Both files are required to continue a previous debug session without needing to compile and upload again
+	
+	Hardware: Arduino Mega w/ ATmega2560 (Mega 2560), Platform=avr, Package=arduino
+*/
+
+#ifndef _VSARDUINO_H_
+#define _VSARDUINO_H_
+#define __AVR_ATmega2560__
+#define ARDUINO 161
+#define ARDUINO_MAIN
+#define __AVR__
+#define __avr__
+#define F_CPU 16000000L
+#define __cplusplus
+#define GCC_VERSION 40801
+#define ARDUINO_ARCH_AVR
+#define ARDUINO_AVR_MEGA2560
+#define __inline__
+#define __asm__(x)
+#define __extension__
+//#define __ATTR_PURE__
+//#define __ATTR_CONST__
+#define __inline__
+//#define __asm__ 
+#define __volatile__
+#define GCC_VERSION 40801
+#define volatile(va_arg) 
+
+typedef void *__builtin_va_list;
+#define __builtin_va_start
+#define __builtin_va_end
+//#define __DOXYGEN__
+#define __attribute__(x)
+#define NOINLINE __attribute__((noinline))
+#define prog_void
+#define PGM_VOID_P int
+#define NEW_H
+/*
+#ifndef __ATTR_CONST__
+#define __ATTR_CONST__ __attribute__((__const__))
+#endif
+
+#ifndef __ATTR_MALLOC__
+#define __ATTR_MALLOC__ __attribute__((__malloc__))
+#endif
+
+#ifndef __ATTR_NORETURN__
+#define __ATTR_NORETURN__ __attribute__((__noreturn__))
+#endif
+
+#ifndef __ATTR_PURE__
+#define __ATTR_PURE__ __attribute__((__pure__))
+#endif            
+*/
+typedef unsigned char byte;
+extern "C" void __cxa_pure_virtual() {;}
+
+
+
+#include <arduino.h>
+#include <pins_arduino.h> 
+#undef F
+#define F(string_literal) ((const PROGMEM char *)(string_literal))
+#undef cli
+#define cli()
+#define pgm_read_byte(address_short)
+#define pgm_read_word(address_short)
+#define pgm_read_word2(address_short)
+#define digitalPinToPort(P)
+#define digitalPinToBitMask(P) 
+#define digitalPinToTimer(P)
+#define analogInPinToBit(P)
+#define portOutputRegister(P)
+#define portInputRegister(P)
+#define portModeRegister(P)
+#include <DS3231_Alarms.ino>
+#endif

firmware/lib/Rtc-master/examples/DS3231_Simple/DS3231_Simple.ino

@@ -0,0 +1,123 @@
+
+// CONNECTIONS:
+// DS3231 SDA --> SDA
+// DS3231 SCL --> SCL
+// DS3231 VCC --> 3.3v or 5v
+// DS3231 GND --> GND
+
+/* for software wire use below
+#include <SoftwareWire.h>  // must be included here so that Arduino library object file references work
+#include <RtcDS3231.h>
+
+SoftwareWire myWire(SDA, SCL);
+RtcDS3231<SoftwareWire> Rtc(myWire);
+ for software wire use above */
+
+/* for normal hardware wire use below */
+#include <Wire.h> // must be included here so that Arduino library object file references work
+#include <RtcDS3231.h>
+RtcDS3231<TwoWire> Rtc(Wire);
+/* for normal hardware wire use above */
+
+
+void setup () 
+{
+    Serial.begin(57600);
+
+    Serial.print("compiled: ");
+    Serial.print(__DATE__);
+    Serial.println(__TIME__);
+
+    //--------RTC SETUP ------------
+    // if you are using ESP-01 then uncomment the line below to reset the pins to
+    // the available pins for SDA, SCL
+    // Wire.begin(0, 2); // due to limited pins, use pin 0 and 2 for SDA, SCL
+    
+    Rtc.Begin();
+
+    RtcDateTime compiled = RtcDateTime(__DATE__, __TIME__);
+    printDateTime(compiled);
+    Serial.println();
+
+    if (!Rtc.IsDateTimeValid()) 
+    {
+        // Common Cuases:
+        //    1) first time you ran and the device wasn't running yet
+        //    2) the battery on the device is low or even missing
+
+        Serial.println("RTC lost confidence in the DateTime!");
+
+        // following line sets the RTC to the date & time this sketch was compiled
+        // it will also reset the valid flag internally unless the Rtc device is
+        // having an issue
+
+        Rtc.SetDateTime(compiled);
+    }
+
+    if (!Rtc.GetIsRunning())
+    {
+        Serial.println("RTC was not actively running, starting now");
+        Rtc.SetIsRunning(true);
+    }
+
+    RtcDateTime now = Rtc.GetDateTime();
+    if (now < compiled) 
+    {
+        Serial.println("RTC is older than compile time!  (Updating DateTime)");
+        Rtc.SetDateTime(compiled);
+    }
+    else if (now > compiled) 
+    {
+        Serial.println("RTC is newer than compile time. (this is expected)");
+    }
+    else if (now == compiled) 
+    {
+        Serial.println("RTC is the same as compile time! (not expected but all is fine)");
+    }
+
+    // never assume the Rtc was last configured by you, so
+    // just clear them to your needed state
+    Rtc.Enable32kHzPin(false);
+    Rtc.SetSquareWavePin(DS3231SquareWavePin_ModeNone); 
+}
+
+void loop () 
+{
+    if (!Rtc.IsDateTimeValid()) 
+    {
+        // Common Cuases:
+        //    1) the battery on the device is low or even missing and the power line was disconnected
+        Serial.println("RTC lost confidence in the DateTime!");
+    }
+
+    RtcDateTime now = Rtc.GetDateTime();
+    printDateTime(now);
+    Serial.println();
+
+	RtcTemperature temp = Rtc.GetTemperature();
+	temp.Print(Serial);
+	// you may also get the temperature as a float and print it
+    // Serial.print(temp.AsFloatDegC());
+    Serial.println("C");
+
+    delay(10000); // ten seconds
+}
+
+#define countof(a) (sizeof(a) / sizeof(a[0]))
+
+void printDateTime(const RtcDateTime& dt)
+{
+    char datestring[20];
+
+    snprintf_P(datestring, 
+            countof(datestring),
+            PSTR("%02u/%02u/%04u %02u:%02u:%02u"),
+            dt.Month(),
+            dt.Day(),
+            dt.Year(),
+            dt.Hour(),
+            dt.Minute(),
+            dt.Second() );
+    Serial.print(datestring);
+}
+

firmware/lib/Rtc-master/examples/DS3231_StoreIt/DS3231_StoreIt.ino

@@ -0,0 +1,100 @@
+
+// CONNECTIONS:
+// DS3231 SDA --> SDA
+// DS3231 SCL --> SCL
+// DS3231 VCC --> 3.3v or 5v
+// DS3231 GND --> GND
+
+/* for software wire use below
+#include <SoftwareWire.h>  // must be included here so that Arduino library object file references work
+#include <RtcDS3231.h>
+
+SoftwareWire myWire(SDA, SCL);
+RtcDS3231<SoftwareWire> Rtc(myWire);
+ for software wire use above */
+
+/* for normal hardware wire use below */
+#include <Wire.h> // must be included here so that Arduino library object file references work
+#include <RtcDS3231.h>
+RtcDS3231<TwoWire> Rtc(Wire);
+/* for normal hardware wire use above */
+
+
+void setup () 
+{
+    Serial.begin(57600);
+
+    Serial.print("compiled: ");
+    Serial.print(__DATE__);
+    Serial.println(__TIME__);
+
+    //--------RTC SETUP ------------
+    // if you are using ESP-01 then uncomment the line below to reset the pins to
+    // the available pins for SDA, SCL
+    // Wire.begin(0, 2); // due to limited pins, use pin 0 and 2 for SDA, SCL
+    
+    Rtc.Begin();
+
+    RtcDateTime compiled = RtcDateTime(__DATE__, __TIME__);
+    printDateTime(compiled);
+    Serial.println();
+
+    if (!Rtc.IsDateTimeValid()) 
+    {
+        Serial.println("RTC lost confidence in the DateTime!");
+        Rtc.SetDateTime(compiled);
+    }
+
+    if (!Rtc.GetIsRunning())
+    {
+        Serial.println("RTC was not actively running, starting now");
+        Rtc.SetIsRunning(true);
+    }
+
+    RtcDateTime now = Rtc.GetDateTime();
+    if (now < compiled) 
+    {
+        Serial.println("RTC is older than compile time!  (Updating DateTime)");
+        Rtc.SetDateTime(compiled);
+    }
+
+    // never assume the Rtc was last configured by you, so
+    // just clear them to your needed state
+    Rtc.Enable32kHzPin(false);
+    Rtc.SetSquareWavePin(DS3231SquareWavePin_ModeNone); 
+}
+
+void loop () 
+{
+    RtcDateTime now = Rtc.GetDateTime();
+
+    printDateTime(now);
+    Serial.println();
+
+    for(;;)
+    {
+        Rtc.SetIsRunning(false);
+        Serial.println(">>> Rtc ready for storage <<<");
+
+        delay(10000); // ten seconds
+    }
+}
+
+#define countof(a) (sizeof(a) / sizeof(a[0]))
+
+void printDateTime(const RtcDateTime& dt)
+{
+	char datestring[20];
+
+	snprintf_P(datestring, 
+			countof(datestring),
+			PSTR("%02u/%02u/%04u %02u:%02u:%02u"),
+			dt.Month(),
+			dt.Day(),
+			dt.Year(),
+			dt.Hour(),
+			dt.Minute(),
+			dt.Second() );
+    Serial.print(datestring);
+}
+

firmware/lib/Rtc-master/extras/RtcTemperatureTests/RtcTemperatureTests.ino

@@ -0,0 +1,204 @@
+// These tests do not rely on RTC hardware at all
+
+//#include <Wire.h> // must be included here so that Arduino library object file references work
+#include <RtcDS3231.h>
+
+void PrintPassFail(bool passed)
+{
+    if (passed)
+    {
+      Serial.print("passed");
+    }
+    else
+    {
+      Serial.print("failed");
+    }
+}
+
+void ComparePrintlnPassFail(RtcTemperature& rtcTemp, float compare)
+{
+    Serial.print(rtcTemp.AsFloatDegC());
+    Serial.print("C ");
+    PrintPassFail(rtcTemp.AsFloatDegC() == compare);
+    Serial.println();
+}
+
+void ConstructorTests()
+{
+    // RTC constructors
+    Serial.println("Constructors:");
+    {
+      RtcTemperature temp075Below(0b11111111, 0b01000000); // -0.75 
+      ComparePrintlnPassFail(temp075Below, -0.75f);
+      
+      RtcTemperature temp050Below(0b11111111, 0b10000000); // -0.5 
+      ComparePrintlnPassFail(temp050Below, -0.50f);
+      
+      RtcTemperature temp025Below(0b11111111, 0b11000000); // -0.25 
+      ComparePrintlnPassFail(temp025Below, -0.25f);
+      
+      RtcTemperature tempZero(0b00000000, 0b00000000); // 0.0 
+      ComparePrintlnPassFail(tempZero, -0.0f);
+      
+      RtcTemperature temp025Above(0b00000000, 0b01000000); // 0.25 
+      ComparePrintlnPassFail(temp025Above, 0.25f);
+      
+      RtcTemperature temp050Above(0b00000000, 0b10000000); // 0.5 
+      ComparePrintlnPassFail(temp050Above, 0.5f);
+      
+      RtcTemperature temp075Above(0b00000000, 0b11000000); // 0.75 
+      ComparePrintlnPassFail(temp075Above, 0.75f);
+
+      RtcTemperature temp25Above(0b00011001, 0b00000000); // 25.0
+      ComparePrintlnPassFail(temp25Above, 25.0f);
+
+      RtcTemperature temp25Below(0b11100111, 0b00000000); // -25.0
+      ComparePrintlnPassFail(temp25Below, -25.0f);
+    }
+    Serial.println();
+    
+    // SameType
+    {
+      Serial.print("same type ");
+      RtcTemperature temp25Below(0b11100111, 0b00000000); // -25.0
+      RtcTemperature test = temp25Below;
+      ComparePrintlnPassFail(test, -25.0f);
+    }
+    
+    // CentiDegrees
+    {
+      Serial.print("centi degrees ");
+      RtcTemperature temp025Below(-25); // -0.25
+      ComparePrintlnPassFail(temp025Below, -0.25f);
+
+      Serial.print("centi degrees ");
+      RtcTemperature temp025Above(25); // 0.25
+      ComparePrintlnPassFail(temp025Above, 0.25f);
+      
+      Serial.print("centi degrees ");
+      RtcTemperature temp25Below(-2500); // -25.0
+      ComparePrintlnPassFail(temp25Below, -25.0f);
+
+      Serial.print("centi degrees ");
+      RtcTemperature temp25Above(2500); // 25.0
+      ComparePrintlnPassFail(temp25Above, 25.0f);
+    }
+    
+    Serial.println();
+}
+
+void PrintlnExpected(RtcTemperature& temp, uint16_t digits)
+{
+  Serial.print(" = ");
+  Serial.print(temp.AsFloatDegC(), digits);
+  Serial.println();
+}
+
+void PrintTests()
+{
+  Serial.println("Prints:");
+  
+  RtcTemperature temp25Above(2500);
+  temp25Above.Print(Serial);
+  PrintlnExpected(temp25Above, 2);
+  
+  RtcTemperature temp25Below(-2500);
+  temp25Below.Print(Serial);
+  PrintlnExpected(temp25Below, 2);
+
+  RtcTemperature temp025Above(25);
+  temp025Above.Print(Serial);
+  PrintlnExpected(temp025Above, 2);
+  temp025Above.Print(Serial, 1);
+  PrintlnExpected(temp025Above, 1);
+  
+  RtcTemperature temp025Below(-25);
+  temp025Below.Print(Serial);
+  PrintlnExpected(temp025Below, 2);
+  temp025Below.Print(Serial, 1);
+  PrintlnExpected(temp025Below, 1);
+
+  RtcTemperature temp050Above(50);
+  temp050Above.Print(Serial);
+  PrintlnExpected(temp050Above, 2);
+  temp050Above.Print(Serial, 0);
+  PrintlnExpected(temp050Above, 0);
+  
+  RtcTemperature temp050Below(-50);
+  temp050Below.Print(Serial);
+  PrintlnExpected(temp050Below, 2);
+  temp050Below.Print(Serial, 0);
+  PrintlnExpected(temp050Below, 0);
+  temp050Below.Print(Serial, 2, ',');
+  Serial.println(" == -0,50");
+  
+  Serial.println();
+}
+
+void MathmaticalOperatorTests()
+{
+  Serial.println("Mathmaticals:");
+
+  RtcTemperature temp050Below(-50);
+  RtcTemperature temp050Above(50);
+  RtcTemperature temp050Diff(100);
+  RtcTemperature temp050Same(-50);
+  RtcTemperature tempResult;
+
+  Serial.print("equality ");
+  PrintPassFail(temp050Below == temp050Same);
+  Serial.println();
+
+  Serial.print("inequality ");
+  PrintPassFail(temp050Below != temp050Above);
+  Serial.println();
+  
+  Serial.print("less than ");
+  PrintPassFail(temp050Below < temp050Above);
+  Serial.println();
+
+  Serial.print("greater than ");
+  PrintPassFail(temp050Above > temp050Below);
+  Serial.println();
+
+  Serial.print("less than ");
+  PrintPassFail(temp050Below <= temp050Above);
+  Serial.print(" or equal ");
+  PrintPassFail(temp050Below <= temp050Same);
+  Serial.println();
+
+  Serial.print("greater than ");
+  PrintPassFail(temp050Above >= temp050Below);
+  Serial.print(" or equal ");
+  PrintPassFail(temp050Below >= temp050Same);
+  Serial.println();
+
+  tempResult = temp050Above - temp050Below;
+  Serial.print("subtraction ");
+  PrintPassFail(tempResult == temp050Diff);
+  Serial.println();
+
+  tempResult = temp050Above + temp050Above;
+  Serial.print("addition ");
+  PrintPassFail(tempResult == temp050Diff);
+  Serial.println();
+    
+  Serial.println();
+}
+
+void setup () 
+{
+    Serial.begin(115200);
+    while (!Serial);
+    Serial.println();
+    
+    ConstructorTests();
+    PrintTests();
+    MathmaticalOperatorTests();
+}
+
+void loop () 
+{
+    delay(500);
+}
+

firmware/lib/Rtc-master/keywords.txt

@@ -0,0 +1,93 @@
+#######################################
+# Syntax Coloring Map RTC
+#######################################
+
+#######################################
+# Datatypes (KEYWORD1)
+#######################################
+
+DS3231AlarmOne	KEYWORD1
+DS3231AlarmTwo	KEYWORD1
+RtcDS3231	KEYWORD1
+RtcTemperature	KEYWORD1
+RtcDateTime	KEYWORD1
+DayOfWeek	KEYWORD1
+
+#######################################
+# Methods and Functions (KEYWORD2)
+#######################################
+
+Begin	KEYWORD2
+IsDateTimeValid	KEYWORD2
+GetIsRunning	KEYWORD2
+SetIsRunning	KEYWORD2
+SetDateTime	KEYWORD2
+GetDateTime	KEYWORD2
+GetTemperature	KEYWORD2
+Enable32kHzPin	KEYWORD2
+SetSquareWavePin	KEYWORD2
+SetSquareWavePinClockFrequency	KEYWORD2
+SetAlarmOne	KEYWORD2
+SetAlarmTwo	KEYWORD2
+GetAlarmOne	KEYWORD2
+GetAlarmTwo	KEYWORD2
+LatchAlarmsTriggeredFlags	KEYWORD2
+ForceTemperatureCompensationUpdate	KEYWORD2
+GetAgingOffset	KEYWORD2
+SetAgingOffset	KEYWORD2
+AsFloat	KEYWORD2
+AsWholeDegrees	KEYWORD2
+GetFractional	KEYWORD2
+Year	KEYWORD2
+Month	KEYWORD2
+Day	KEYWORD2
+Hour	KEYWORD2
+Minute	KEYWORD2
+Second	KEYWORD2
+DayOfWeek	KEYWORD2
+TotalSeconds	KEYWORD2
+DayOf	KEYWORD2
+ControlFlags	KEYWORD2
+
+#######################################
+# Constants (LITERAL1)
+#######################################
+
+DS3231SquareWaveClock_1Hz	LITERAL1
+DS3231SquareWaveClock_1kHz	LITERAL1
+DS3231SquareWaveClock_4kHz	LITERAL1
+DS3231SquareWaveClock_8kHz	LITERAL1
+DS3231SquareWavePin_ModeNone	LITERAL1
+DS3231SquareWavePin_ModeBatteryBackup	LITERAL1
+DS3231SquareWavePin_ModeClock	LITERAL1
+DS3231SquareWavePin_ModeAlarmOne	LITERAL1
+DS3231SquareWavePin_ModeAlarmTwo	LITERAL1
+DS3231SquareWavePin_ModeAlarmBoth	LITERAL1
+DS3231AlarmOneControl_HoursMinutesSecondsDayOfMonthMatch	LITERAL1
+DS3231AlarmOneControl_OncePerSecond	LITERAL1
+DS3231AlarmOneControl_SecondsMatch	LITERAL1
+DS3231AlarmOneControl_MinutesSecondsMatch	LITERAL1
+DS3231AlarmOneControl_HoursMinutesSecondsMatch	LITERAL1
+DS3231AlarmOneControl_HoursMinutesSecondsDayOfWeekMatch	LITERAL1
+DS3231AlarmTwoControl_HoursMinutesDayOfMonthMatch	LITERAL1
+DS3231AlarmTwoControl_OncePerMinute	LITERAL1
+DS3231AlarmTwoControl_MinutesMatch	LITERAL1
+DS3231AlarmTwoControl_HoursMinutesMatch	LITERAL1
+DS3231AlarmTwoControl_HoursMinutesDayOfWeekMatch	LITERAL1
+DS3231AlarmFlag_Alarm1	LITERAL1
+DS3231AlarmFlag_Alarm2	LITERAL1
+DS3231AlarmFlag_AlarmBoth	LITERAL1
+DS1307SquareWaveOut_1Hz	LITERAL1
+DS1307SquareWaveOut_4kHz	LITERAL1
+DS1307SquareWaveOut_8kHz	LITERAL1
+DS1307SquareWaveOut_32kHz	LITERAL1
+DS1307SquareWaveOut_High	LITERAL1
+DS1307SquareWaveOut_Low	LITERAL1
+DayOfWeek_Sunday	LITERAL1
+DayOfWeek_Monday	LITERAL1
+DayOfWeek_Tuesday	LITERAL1
+DayOfWeek_Wednesday	LITERAL1
+DayOfWeek_Thursday	LITERAL1
+DayOfWeek_Friday	LITERAL1
+DayOfWeek_Saturday	LITERAL1
+

firmware/lib/Rtc-master/library.json

@@ -0,0 +1,14 @@
+{
+  "name": "RTC",
+  "keywords": "RTC, DS1307, DS3231, clock",
+  "description": "A library that makes interfacing DS1307 and DS3231 Real Time Clock modules easy.",
+  "repository":
+  {
+    "type": "git",
+    "url": "https://github.com/Makuna/Rtc.git"
+  },
+  "version": "2.1.0",
+  "frameworks": "arduino",
+  "platforms": "*"
+}
+

firmware/lib/Rtc-master/library.properties

@@ -0,0 +1,9 @@
+name=Rtc by Makuna
+version=2.1.0
+author=Michael C. Miller (makuna@live.com)
+maintainer=Michael C. Miller (makuna@live.com)
+sentence=A library that makes interfacing DS1307 and DS3231 Real Time Clock modules easy.
+paragraph=Includes deep support of module features, including temperature, alarms and memory storage if present.  Tested on esp8266.
+category=Device Control
+url=https://github.com/Makuna/Rtc/wiki
+architectures=*

firmware/lib/Rtc-master/src/RtcDS1307.h

@@ -0,0 +1,225 @@
+
+
+#ifndef __RTCDS1307_H__
+#define __RTCDS1307_H__
+
+#include <Arduino.h>
+#include "RtcDateTime.h"
+#include "RtcUtility.h"
+
+//I2C Slave Address  
+const uint8_t DS1307_ADDRESS = 0x68;
+
+//DS1307 Register Addresses
+const uint8_t DS1307_REG_TIMEDATE   = 0x00;
+const uint8_t DS1307_REG_STATUS     = 0x00;
+const uint8_t DS1307_REG_CONTROL    = 0x07;
+const uint8_t DS1307_REG_RAMSTART   = 0x08;
+const uint8_t DS1307_REG_RAMEND     = 0x3f;
+const uint8_t DS1307_REG_RAMSIZE = DS1307_REG_RAMEND - DS1307_REG_RAMSTART;
+
+//DS1307 Register Data Size if not just 1
+const uint8_t DS1307_REG_TIMEDATE_SIZE = 7;
+
+// DS1307 Control Register Bits
+const uint8_t DS1307_RS0   = 0;
+const uint8_t DS1307_RS1   = 1;
+const uint8_t DS1307_SQWE  = 4;
+const uint8_t DS1307_OUT   = 7;
+
+// DS1307 Status Register Bits
+const uint8_t DS1307_CH       = 7;
+
+enum DS1307SquareWaveOut
+{
+    DS1307SquareWaveOut_1Hz  =  0b00010000,
+    DS1307SquareWaveOut_4kHz =  0b00010001,
+    DS1307SquareWaveOut_8kHz =  0b00010010,
+    DS1307SquareWaveOut_32kHz = 0b00010011,
+    DS1307SquareWaveOut_High =  0b10000000,
+    DS1307SquareWaveOut_Low =   0b00000000,
+};
+
+template<class T_WIRE_METHOD> class RtcDS1307
+{
+public:
+    RtcDS1307(T_WIRE_METHOD& wire) :
+        _wire(wire)
+    {
+    }
+
+    void Begin()
+    {
+        _wire.begin();
+    }
+
+    bool IsDateTimeValid()
+    {
+        return GetIsRunning();
+    }
+
+    bool GetIsRunning()
+    {
+        uint8_t sreg = getReg(DS1307_REG_STATUS);
+        return !(sreg & _BV(DS1307_CH));
+    }
+
+    void SetIsRunning(bool isRunning)
+    {
+        uint8_t sreg = getReg(DS1307_REG_STATUS);
+        if (isRunning)
+        {
+            sreg &= ~_BV(DS1307_CH);
+        }
+        else
+        {
+            sreg |= _BV(DS1307_CH);
+        }
+        setReg(DS1307_REG_STATUS, sreg);
+    }
+
+    void SetDateTime(const RtcDateTime& dt)
+    {
+        // retain running state
+        uint8_t sreg = getReg(DS1307_REG_STATUS) & _BV(DS1307_CH);
+
+        // set the date time
+        _wire.beginTransmission(DS1307_ADDRESS);
+        _wire.write(DS1307_REG_TIMEDATE);
+
+        _wire.write(Uint8ToBcd(dt.Second()) | sreg);
+        _wire.write(Uint8ToBcd(dt.Minute()));
+        _wire.write(Uint8ToBcd(dt.Hour())); // 24 hour mode only
+
+        // RTC Hardware Day of Week is 1-7, 1 = Monday
+        // convert our Day of Week to Rtc Day of Week
+        uint8_t rtcDow = RtcDateTime::ConvertDowToRtc(dt.DayOfWeek());
+
+        _wire.write(Uint8ToBcd(rtcDow)); 
+        _wire.write(Uint8ToBcd(dt.Day()));
+        _wire.write(Uint8ToBcd(dt.Month()));
+        _wire.write(Uint8ToBcd(dt.Year() - 2000));
+
+        _wire.endTransmission();
+    }
+
+    RtcDateTime GetDateTime()
+    {
+        _wire.beginTransmission(DS1307_ADDRESS);
+        _wire.write(DS1307_REG_TIMEDATE);
+        _wire.endTransmission();
+
+        _wire.requestFrom(DS1307_ADDRESS, DS1307_REG_TIMEDATE_SIZE);
+        uint8_t second = BcdToUint8(_wire.read() & 0x7F);
+        uint8_t minute = BcdToUint8(_wire.read());
+        uint8_t hour = BcdToBin24Hour(_wire.read());
+
+        _wire.read();  // throwing away day of week as we calculate it
+
+        uint8_t dayOfMonth = BcdToUint8(_wire.read());
+        uint8_t month = BcdToUint8(_wire.read());
+        uint16_t year = BcdToUint8(_wire.read()) + 2000;
+
+        return RtcDateTime(year, month, dayOfMonth, hour, minute, second);
+    }
+
+    void SetMemory(uint8_t memoryAddress, uint8_t value)
+    {
+        uint8_t address = memoryAddress + DS1307_REG_RAMSTART;
+        if (address <= DS1307_REG_RAMEND)
+        {
+            setReg(address, value);
+        }
+    }
+
+    uint8_t GetMemory(uint8_t memoryAddress)
+    {
+        uint8_t value = 0;
+        uint8_t address = memoryAddress + DS1307_REG_RAMSTART;
+        if (address <= DS1307_REG_RAMEND)
+        {
+            value = getReg(address);
+        }
+        return value;
+    }
+
+    uint8_t SetMemory(uint8_t memoryAddress, const uint8_t* pValue, uint8_t countBytes)
+    {
+        uint8_t address = memoryAddress + DS1307_REG_RAMSTART;
+        uint8_t countWritten = 0;
+        if (address <= DS1307_REG_RAMEND)
+        {
+            _wire.beginTransmission(DS1307_ADDRESS);
+            _wire.write(address);
+
+            while (countBytes > 0 && address <= DS1307_REG_RAMEND)
+            {
+                _wire.write(*pValue++);
+                address++;
+                countBytes--;
+                countWritten++;
+            }
+
+            _wire.endTransmission();
+        }
+        return countWritten;
+    }
+
+    uint8_t GetMemory(uint8_t memoryAddress, uint8_t* pValue, uint8_t countBytes)
+    {
+        uint8_t address = memoryAddress + DS1307_REG_RAMSTART;
+        uint8_t countRead = 0;
+        if (address <= DS1307_REG_RAMEND)
+        {
+            if (countBytes > DS1307_REG_RAMSIZE)
+            {
+                countBytes = DS1307_REG_RAMSIZE;
+            }
+
+            _wire.beginTransmission(DS1307_ADDRESS);
+            _wire.write(address);
+            _wire.endTransmission();
+
+            _wire.requestFrom(DS1307_ADDRESS, countBytes);
+
+            while (countBytes-- > 0)
+            {
+                *pValue++ = _wire.read();
+                countRead++;
+            }
+        }
+
+        return countRead;
+    }
+
+    void SetSquareWavePin(DS1307SquareWaveOut pinMode)
+    {
+        setReg(DS1307_REG_CONTROL, pinMode);
+    }
+
+private:
+    T_WIRE_METHOD& _wire;
+
+    uint8_t getReg(uint8_t regAddress)
+    {
+        _wire.beginTransmission(DS1307_ADDRESS);
+        _wire.write(regAddress);
+        _wire.endTransmission();
+
+        // control register
+        _wire.requestFrom(DS1307_ADDRESS, (uint8_t)1);
+
+        uint8_t regValue = _wire.read();
+        return regValue;
+    }
+
+    void setReg(uint8_t regAddress, uint8_t regValue)
+    {
+        _wire.beginTransmission(DS1307_ADDRESS);
+        _wire.write(regAddress);
+        _wire.write(regValue);
+        _wire.endTransmission();
+    }
+};
+
+#endif // __RTCDS1307_H__

firmware/lib/Rtc-master/src/RtcDS3231.h

@@ -0,0 +1,576 @@
+
+
+#ifndef __RTCDS3231_H__
+#define __RTCDS3231_H__
+
+#include <Arduino.h>
+
+#include "RtcDateTime.h"
+#include "RtcTemperature.h"
+#include "RtcUtility.h"
+
+
+//I2C Slave Address  
+const uint8_t DS3231_ADDRESS = 0x68;
+
+//DS3231 Register Addresses
+const uint8_t DS3231_REG_TIMEDATE  = 0x00;
+const uint8_t DS3231_REG_ALARMONE  = 0x07;
+const uint8_t DS3231_REG_ALARMTWO  = 0x0B;
+                                         
+const uint8_t DS3231_REG_CONTROL   = 0x0E;
+const uint8_t DS3231_REG_STATUS    = 0x0F;
+const uint8_t DS3231_REG_AGING     = 0x10;
+                                         
+const uint8_t DS3231_REG_TEMP      = 0x11;
+
+//DS3231 Register Data Size if not just 1
+const uint8_t DS3231_REG_TIMEDATE_SIZE = 7;
+const uint8_t DS3231_REG_ALARMONE_SIZE = 4;
+const uint8_t DS3231_REG_ALARMTWO_SIZE = 3;
+
+const uint8_t DS3231_REG_TEMP_SIZE = 2;
+
+// DS3231 Control Register Bits
+const uint8_t DS3231_A1IE  = 0;
+const uint8_t DS3231_A2IE  = 1;
+const uint8_t DS3231_INTCN = 2;
+const uint8_t DS3231_RS1   = 3;
+const uint8_t DS3231_RS2   = 4;
+const uint8_t DS3231_CONV  = 5;
+const uint8_t DS3231_BBSQW = 6;
+const uint8_t DS3231_EOSC  = 7;
+const uint8_t DS3231_AIEMASK = (_BV(DS3231_A1IE) | _BV(DS3231_A2IE));
+const uint8_t DS3231_RSMASK = (_BV(DS3231_RS1) | _BV(DS3231_RS2));
+
+// DS3231 Status Register Bits
+const uint8_t DS3231_A1F      = 0;
+const uint8_t DS3231_A2F      = 1;
+const uint8_t DS3231_BSY      = 2;
+const uint8_t DS3231_EN32KHZ  = 3;
+const uint8_t DS3231_OSF      = 7;
+const uint8_t DS3231_AIFMASK = (_BV(DS3231_A1F) | _BV(DS3231_A2F));
+
+
+// seconds accuracy
+enum DS3231AlarmOneControl
+{
+    // bit order:  A1M4  DY/DT  A1M3  A1M2  A1M1
+    DS3231AlarmOneControl_HoursMinutesSecondsDayOfMonthMatch = 0x00,
+    DS3231AlarmOneControl_OncePerSecond = 0x17,
+    DS3231AlarmOneControl_SecondsMatch = 0x16,
+    DS3231AlarmOneControl_MinutesSecondsMatch = 0x14,
+    DS3231AlarmOneControl_HoursMinutesSecondsMatch = 0x10,
+    DS3231AlarmOneControl_HoursMinutesSecondsDayOfWeekMatch = 0x08,
+};
+
+class DS3231AlarmOne
+{
+public:
+    DS3231AlarmOne( uint8_t dayOf,
+            uint8_t hour,
+            uint8_t minute,
+            uint8_t second,
+            DS3231AlarmOneControl controlFlags) :
+        _flags(controlFlags),
+        _dayOf(dayOf),
+        _hour(hour),
+        _minute(minute),
+        _second(second)
+    {
+    }
+
+    uint8_t DayOf() const
+    {
+        return _dayOf;
+    }
+
+    uint8_t Hour() const
+    {
+        return _hour;
+    }
+
+    uint8_t Minute() const
+    {
+        return _minute;
+    }
+
+    uint8_t Second() const
+    {
+        return _second;
+    }
+
+    DS3231AlarmOneControl ControlFlags() const
+    {
+        return _flags;
+    }
+
+    bool operator == (const DS3231AlarmOne& other) const
+    {
+        return (_dayOf == other._dayOf &&
+                _hour == other._hour &&
+                _minute == other._minute &&
+                _second == other._second &&
+                _flags == other._flags);
+    }
+
+    bool operator != (const DS3231AlarmOne& other) const
+    {
+        return !(*this == other);
+    }
+
+protected:
+    DS3231AlarmOneControl _flags;
+
+    uint8_t _dayOf;
+    uint8_t _hour;
+    uint8_t _minute;
+    uint8_t _second;  
+};
+
+// minutes accuracy
+enum DS3231AlarmTwoControl
+{
+    // bit order:  A2M4  DY/DT  A2M3  A2M2
+    DS3231AlarmTwoControl_HoursMinutesDayOfMonthMatch = 0x00,
+    DS3231AlarmTwoControl_OncePerMinute = 0x0b,
+    DS3231AlarmTwoControl_MinutesMatch = 0x0a,
+    DS3231AlarmTwoControl_HoursMinutesMatch = 0x08,
+    DS3231AlarmTwoControl_HoursMinutesDayOfWeekMatch = 0x04,
+};
+
+class DS3231AlarmTwo
+{
+public:
+    DS3231AlarmTwo( uint8_t dayOf,
+            uint8_t hour,
+            uint8_t minute,
+            DS3231AlarmTwoControl controlFlags) :
+        _flags(controlFlags),
+        _dayOf(dayOf),
+        _hour(hour),
+        _minute(minute)
+    {
+    }
+
+    uint8_t DayOf() const
+    {
+        return _dayOf;
+    }
+
+    uint8_t Hour() const
+    {
+        return _hour;
+    }
+
+    uint8_t Minute() const
+    {
+        return _minute;
+    }
+
+    DS3231AlarmTwoControl ControlFlags() const
+    {
+        return _flags;
+    }
+
+    bool operator == (const DS3231AlarmTwo& other) const
+    {
+        return (_dayOf == other._dayOf &&
+                _hour == other._hour &&
+                _minute == other._minute &&
+                _flags == other._flags);
+    }
+
+    bool operator != (const DS3231AlarmTwo& other) const
+    {
+        return !(*this == other);
+    }
+
+protected:
+    DS3231AlarmTwoControl _flags;
+
+    uint8_t _dayOf;
+    uint8_t _hour;
+    uint8_t _minute;
+};
+
+
+enum DS3231SquareWaveClock
+{
+    DS3231SquareWaveClock_1Hz  = 0b00000000,
+    DS3231SquareWaveClock_1kHz = 0b00001000,
+    DS3231SquareWaveClock_4kHz = 0b00010000,
+    DS3231SquareWaveClock_8kHz = 0b00011000,
+};
+
+enum DS3231SquareWavePinMode
+{
+    DS3231SquareWavePin_ModeNone,
+    DS3231SquareWavePin_ModeBatteryBackup,
+    DS3231SquareWavePin_ModeClock,
+    DS3231SquareWavePin_ModeAlarmOne,
+    DS3231SquareWavePin_ModeAlarmTwo,
+    DS3231SquareWavePin_ModeAlarmBoth
+};
+
+enum DS3231AlarmFlag
+{
+    DS3231AlarmFlag_Alarm1 = 0x01,
+    DS3231AlarmFlag_Alarm2 = 0x02,
+    DS3231AlarmFlag_AlarmBoth = 0x03,
+};
+
+template<class T_WIRE_METHOD> class RtcDS3231
+{
+public:
+    RtcDS3231(T_WIRE_METHOD& wire) :
+        _wire(wire)
+    {
+    }
+
+    void Begin()
+    {
+        _wire.begin();
+    }
+
+    bool IsDateTimeValid()
+    {
+        uint8_t status = getReg(DS3231_REG_STATUS);
+        return !(status & _BV(DS3231_OSF));
+    }
+
+    bool GetIsRunning()
+    {
+        uint8_t creg = getReg(DS3231_REG_CONTROL);
+        return !(creg & _BV(DS3231_EOSC));
+    }
+
+    void SetIsRunning(bool isRunning)
+    {
+        uint8_t creg = getReg(DS3231_REG_CONTROL);
+        if (isRunning)
+        {
+            creg &= ~_BV(DS3231_EOSC);
+        }
+        else
+        {
+            creg |= _BV(DS3231_EOSC);
+        }
+        setReg(DS3231_REG_CONTROL, creg);
+    }
+
+    void SetDateTime(const RtcDateTime& dt)
+    {
+        // clear the invalid flag
+        uint8_t status = getReg(DS3231_REG_STATUS);
+        status &= ~_BV(DS3231_OSF); // clear the flag
+        setReg(DS3231_REG_STATUS, status);
+
+        // set the date time
+        _wire.beginTransmission(DS3231_ADDRESS);
+        _wire.write(DS3231_REG_TIMEDATE);
+
+        _wire.write(Uint8ToBcd(dt.Second()));
+        _wire.write(Uint8ToBcd(dt.Minute()));
+        _wire.write(Uint8ToBcd(dt.Hour())); // 24 hour mode only
+
+        uint8_t year = dt.Year() - 2000;
+        uint8_t centuryFlag = 0;
+
+        if (year >= 100)
+        {
+            year -= 100;
+            centuryFlag = _BV(7);
+        }
+
+        // RTC Hardware Day of Week is 1-7, 1 = Monday
+        // convert our Day of Week to Rtc Day of Week
+        uint8_t rtcDow = RtcDateTime::ConvertDowToRtc(dt.DayOfWeek());
+
+        _wire.write(Uint8ToBcd(rtcDow));
+
+        _wire.write(Uint8ToBcd(dt.Day()));
+        _wire.write(Uint8ToBcd(dt.Month()) | centuryFlag);
+        _wire.write(Uint8ToBcd(year));
+
+        _wire.endTransmission();
+    }
+
+    RtcDateTime GetDateTime()
+    {
+        _wire.beginTransmission(DS3231_ADDRESS);
+        _wire.write(DS3231_REG_TIMEDATE);
+        _wire.endTransmission();
+
+        _wire.requestFrom(DS3231_ADDRESS, DS3231_REG_TIMEDATE_SIZE);
+        uint8_t second = BcdToUint8(_wire.read() & 0x7F);
+        uint8_t minute = BcdToUint8(_wire.read());
+        uint8_t hour = BcdToBin24Hour(_wire.read());
+
+        _wire.read();  // throwing away day of week as we calculate it
+
+        uint8_t dayOfMonth = BcdToUint8(_wire.read());
+        uint8_t monthRaw = _wire.read();
+        uint16_t year = BcdToUint8(_wire.read()) + 2000;
+
+        if (monthRaw & _BV(7)) // century wrap flag
+        {
+            year += 100;
+        }
+        uint8_t month = BcdToUint8(monthRaw & 0x7f);
+
+
+        return RtcDateTime(year, month, dayOfMonth, hour, minute, second);
+    }
+
+    RtcTemperature GetTemperature()
+    {
+        _wire.beginTransmission(DS3231_ADDRESS);
+        _wire.write(DS3231_REG_TEMP);
+        _wire.endTransmission();
+
+        // Temperature is represented as a 10-bit code with a resolution
+        // of 1/4th <20>C and is accessable as a signed 16-bit integer at
+        // locations 11h and 12h.
+        //
+        //       |         r11h          | DP |         r12h         |
+        // Bit:   15 14 13 12 11 10  9  8   .  7  6  5  4  3  2  1  0  -1 -2
+        //         s  i  i  i  i  i  i  i   .  f  f  0  0  0  0  0  0
+        //
+        // As it takes (8) right-shifts to register the decimal point (DP) to
+        // the right of the 0th bit, the overall word scaling equals 256.
+        //
+        // For example, at +/- 25.25<EFBFBD>C, concatenated registers <r11h:r12h> =
+        // 256 * (+/- 25+(1/4)) = +/- 6464, or 1940h / E6C0h.
+
+        _wire.requestFrom(DS3231_ADDRESS, DS3231_REG_TEMP_SIZE);
+        int8_t  r11h = _wire.read();                  // MS byte, signed temperature
+        return RtcTemperature( r11h, _wire.read() );  // LS byte is r12h
+    }
+
+    void Enable32kHzPin(bool enable)
+    {
+        uint8_t sreg = getReg(DS3231_REG_STATUS);
+
+        if (enable == true)
+        {
+            sreg |= _BV(DS3231_EN32KHZ);
+        }
+        else
+        {
+            sreg &= ~_BV(DS3231_EN32KHZ);
+        }
+
+        setReg(DS3231_REG_STATUS, sreg);
+    }
+
+    void SetSquareWavePin(DS3231SquareWavePinMode pinMode)
+    {
+        uint8_t creg = getReg(DS3231_REG_CONTROL);
+
+        // clear all relevant bits to a known "off" state
+        creg &= ~(DS3231_AIEMASK | _BV(DS3231_BBSQW));
+        creg |= _BV(DS3231_INTCN);  // set INTCN to disables SQW
+
+        switch (pinMode)
+        {
+        case DS3231SquareWavePin_ModeNone:
+            break;
+
+        case DS3231SquareWavePin_ModeBatteryBackup:
+            creg |= _BV(DS3231_BBSQW); // set battery backup flag
+            creg &= ~_BV(DS3231_INTCN); // clear INTCN to enable SQW 
+            break;
+
+        case DS3231SquareWavePin_ModeClock:
+            creg &= ~_BV(DS3231_INTCN); // clear INTCN to enable SQW 
+            break;
+
+        case DS3231SquareWavePin_ModeAlarmOne:
+            creg |= _BV(DS3231_A1IE);
+            break;
+
+        case DS3231SquareWavePin_ModeAlarmTwo:
+            creg |= _BV(DS3231_A2IE);
+            break;
+
+        case DS3231SquareWavePin_ModeAlarmBoth:
+            creg |= _BV(DS3231_A1IE) | _BV(DS3231_A2IE);
+            break;
+        }
+
+        setReg(DS3231_REG_CONTROL, creg);
+    }
+
+    void SetSquareWavePinClockFrequency(DS3231SquareWaveClock freq)
+    {
+        uint8_t creg = getReg(DS3231_REG_CONTROL);
+
+        creg &= ~DS3231_RSMASK; // Set to 0
+        creg |= (freq & DS3231_RSMASK); // Set freq bits
+
+        setReg(DS3231_REG_CONTROL, creg);
+    }
+
+
+    void SetAlarmOne(const DS3231AlarmOne& alarm)
+    {
+        _wire.beginTransmission(DS3231_ADDRESS);
+        _wire.write(DS3231_REG_ALARMONE);
+
+        _wire.write(Uint8ToBcd(alarm.Second()) | ((alarm.ControlFlags() & 0x01) << 7));
+        _wire.write(Uint8ToBcd(alarm.Minute()) | ((alarm.ControlFlags() & 0x02) << 6));
+        _wire.write(Uint8ToBcd(alarm.Hour()) | ((alarm.ControlFlags() & 0x04) << 5)); // 24 hour mode only
+
+        uint8_t rtcDow = alarm.DayOf();
+        if (alarm.ControlFlags() == DS3231AlarmOneControl_HoursMinutesSecondsDayOfWeekMatch)
+        {
+            rtcDow = RtcDateTime::ConvertDowToRtc(rtcDow);
+        }
+
+        _wire.write(Uint8ToBcd(rtcDow) | ((alarm.ControlFlags() & 0x18) << 3));
+
+        _wire.endTransmission();
+    }
+
+    void SetAlarmTwo(const DS3231AlarmTwo& alarm)
+    {
+        _wire.beginTransmission(DS3231_ADDRESS);
+        _wire.write(DS3231_REG_ALARMTWO);
+
+        _wire.write(Uint8ToBcd(alarm.Minute()) | ((alarm.ControlFlags() & 0x01) << 7));
+        _wire.write(Uint8ToBcd(alarm.Hour()) | ((alarm.ControlFlags() & 0x02) << 6)); // 24 hour mode only
+
+        // convert our Day of Week to Rtc Day of Week if needed
+        uint8_t rtcDow = alarm.DayOf();
+        if (alarm.ControlFlags() == DS3231AlarmTwoControl_HoursMinutesDayOfWeekMatch)
+        {
+            rtcDow = RtcDateTime::ConvertDowToRtc(rtcDow);
+        }
+        
+        _wire.write(Uint8ToBcd(rtcDow) | ((alarm.ControlFlags() & 0x0c) << 4));
+
+        _wire.endTransmission();
+    }
+
+    DS3231AlarmOne GetAlarmOne()
+    {
+        _wire.beginTransmission(DS3231_ADDRESS);
+        _wire.write(DS3231_REG_ALARMONE);
+        _wire.endTransmission();
+
+        _wire.requestFrom(DS3231_ADDRESS, DS3231_REG_ALARMONE_SIZE);
+
+        uint8_t raw = _wire.read();
+        uint8_t flags = (raw & 0x80) >> 7;
+        uint8_t second = BcdToUint8(raw & 0x7F);
+
+        raw = _wire.read();
+        flags |= (raw & 0x80) >> 6;
+        uint8_t minute = BcdToUint8(raw & 0x7F);
+
+        raw = _wire.read();
+        flags |= (raw & 0x80) >> 5;
+        uint8_t hour = BcdToBin24Hour(raw & 0x7f);
+
+        raw = _wire.read();
+        flags |= (raw & 0xc0) >> 3;
+        uint8_t dayOf = BcdToUint8(raw & 0x3f);
+
+        if (flags == DS3231AlarmOneControl_HoursMinutesSecondsDayOfWeekMatch)
+        {
+            dayOf = RtcDateTime::ConvertRtcToDow(dayOf);
+        }
+
+        return DS3231AlarmOne(dayOf, hour, minute, second, (DS3231AlarmOneControl)flags);
+    }
+
+    DS3231AlarmTwo GetAlarmTwo()
+    {
+        _wire.beginTransmission(DS3231_ADDRESS);
+        _wire.write(DS3231_REG_ALARMTWO);
+        _wire.endTransmission();
+
+        _wire.requestFrom(DS3231_ADDRESS, DS3231_REG_ALARMTWO_SIZE);
+
+        uint8_t raw = _wire.read();
+        uint8_t flags = (raw & 0x80) >> 7;
+        uint8_t minute = BcdToUint8(raw & 0x7F);
+
+        raw = _wire.read();
+        flags |= (raw & 0x80) >> 6;
+        uint8_t hour = BcdToBin24Hour(raw & 0x7f);
+
+        raw = _wire.read();
+        flags |= (raw & 0xc0) >> 4;
+        uint8_t dayOf = BcdToUint8(raw & 0x3f);
+
+        if (flags == DS3231AlarmTwoControl_HoursMinutesDayOfWeekMatch)
+        {
+            dayOf = RtcDateTime::ConvertRtcToDow(dayOf);
+        }
+
+        return DS3231AlarmTwo(dayOf, hour, minute, (DS3231AlarmTwoControl)flags);
+    }
+
+    // Latch must be called after an alarm otherwise it will not
+    // trigger again
+    DS3231AlarmFlag LatchAlarmsTriggeredFlags()
+    {
+        uint8_t sreg = getReg(DS3231_REG_STATUS);
+        uint8_t alarmFlags = (sreg & DS3231_AIFMASK);
+        sreg &= ~DS3231_AIFMASK; // clear the flags
+        setReg(DS3231_REG_STATUS, sreg);
+        return (DS3231AlarmFlag)alarmFlags;
+    }
+
+    void ForceTemperatureCompensationUpdate(bool block)
+    {
+        uint8_t creg = getReg(DS3231_REG_CONTROL);
+        creg |= _BV(DS3231_CONV); // Write CONV bit
+        setReg(DS3231_REG_CONTROL, creg);
+
+        while (block && (creg & _BV(DS3231_CONV)) != 0)
+        {
+            // Block until CONV is 0
+            creg = getReg(DS3231_REG_CONTROL);
+        }
+    }
+
+    int8_t GetAgingOffset()
+    {
+        return getReg(DS3231_REG_AGING);
+    }
+
+    void SetAgingOffset(int8_t value)
+    {
+        setReg(DS3231_REG_AGING, value);
+    }
+
+private:
+    T_WIRE_METHOD& _wire;
+
+    uint8_t getReg(uint8_t regAddress)
+    {
+        _wire.beginTransmission(DS3231_ADDRESS);
+        _wire.write(regAddress);
+        _wire.endTransmission();
+
+        // control register
+        _wire.requestFrom(DS3231_ADDRESS, (uint8_t)1);
+
+        uint8_t regValue = _wire.read();
+        return regValue;
+    }
+
+    void setReg(uint8_t regAddress, uint8_t regValue)
+    {
+        _wire.beginTransmission(DS3231_ADDRESS);
+        _wire.write(regAddress);
+        _wire.write(regValue);
+        _wire.endTransmission();
+    }
+
+};
+
+#endif // __RTCDS3231_H__

firmware/lib/Rtc-master/src/RtcDateTime.cpp

@@ -0,0 +1,154 @@
+
+#include <Arduino.h>
+#include "RtcDateTime.h"
+
+const uint8_t c_daysInMonth[] PROGMEM = { 31,28,31,30,31,30,31,31,30,31,30,31 };
+
+RtcDateTime::RtcDateTime(uint32_t secondsFrom2000)
+{
+    _initWithSecondsFrom2000<uint32_t>(secondsFrom2000);
+}
+
+
+uint8_t StringToUint8(const char* pString)
+{
+    uint8_t value = 0;
+
+    // skip leading 0 and spaces
+    while ('0' == *pString || *pString == ' ')
+    {
+        pString++;
+    }
+
+    // calculate number until we hit non-numeral char
+    while ('0' <= *pString && *pString <= '9')
+    {
+        value *= 10;
+        value += *pString - '0';
+        pString++;
+    }
+    return value;
+}
+
+RtcDateTime::RtcDateTime(const char* date, const char* time)
+{
+    // sample input: date = "Dec 26 2009", time = "12:34:56"
+    _yearFrom2000 = StringToUint8(date + 9);
+    // Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
+    switch (date[0])
+    {
+    case 'J':
+        if ( date[1] == 'a' )
+            _month = 1;
+        else if ( date[2] == 'n' )
+            _month = 6;
+        else
+            _month = 7;
+        break;
+    case 'F':
+        _month = 2;
+        break;
+    case 'A':
+        _month = date[1] == 'p' ? 4 : 8;
+        break;
+    case 'M':
+        _month = date[2] == 'r' ? 3 : 5;
+        break;
+    case 'S':
+        _month = 9;
+        break;
+    case 'O':
+        _month = 10;
+        break;
+    case 'N':
+        _month = 11;
+        break;
+    case 'D':
+        _month = 12;
+        break;
+    }
+    _dayOfMonth = StringToUint8(date + 4);
+    _hour = StringToUint8(time);
+    _minute = StringToUint8(time + 3);
+    _second = StringToUint8(time + 6);
+}
+
+template <typename T> T DaysSinceFirstOfYear2000(uint16_t year, uint8_t month, uint8_t dayOfMonth)
+{
+    T days = dayOfMonth;
+    for (uint8_t indexMonth = 1; indexMonth < month; ++indexMonth)
+    {
+        days += pgm_read_byte(c_daysInMonth + indexMonth - 1);
+    }
+    if (month > 2 && year % 4 == 0)
+    {
+        days++;
+    }
+    return days + 365 * year + (year + 3) / 4 - 1;
+}
+
+template <typename T> T SecondsIn(T days, uint8_t hours, uint8_t minutes, uint8_t seconds)
+{
+    return ((days * 24L + hours) * 60 + minutes) * 60 + seconds;
+}
+
+uint8_t RtcDateTime::DayOfWeek() const
+{
+    uint16_t days = DaysSinceFirstOfYear2000<uint16_t>(_yearFrom2000, _month, _dayOfMonth);
+    return (days + 6) % 7; // Jan 1, 2000 is a Saturday, i.e. returns 6
+}
+
+uint32_t RtcDateTime::TotalSeconds() const
+{
+    uint16_t days = DaysSinceFirstOfYear2000<uint16_t>(_yearFrom2000, _month, _dayOfMonth);
+    return SecondsIn<uint32_t>(days, _hour, _minute, _second);
+}
+
+uint64_t RtcDateTime::TotalSeconds64() const
+{
+    uint32_t days = DaysSinceFirstOfYear2000<uint32_t>(_yearFrom2000, _month, _dayOfMonth);
+    return SecondsIn<uint64_t>(days, _hour, _minute, _second);
+}
+
+void RtcDateTime::InitWithIso8601(const char* date)
+{
+    // sample input: date = "Sat, 26 Dec 2009 12:34:56 GMT"
+    _yearFrom2000 = StringToUint8(date + 13);
+    // Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
+    switch (date[8])
+    {
+    case 'J':
+        if (date[1 + 8] == 'a')
+            _month = 1;
+        else if (date[2 + 8] == 'n')
+            _month = 6;
+        else
+            _month = 7;
+        break;
+    case 'F':
+        _month = 2;
+        break;
+    case 'A':
+        _month = date[1 + 8] == 'p' ? 4 : 8;
+        break;
+    case 'M':
+        _month = date[2 + 8] == 'r' ? 3 : 5;
+        break;
+    case 'S':
+        _month = 9;
+        break;
+    case 'O':
+        _month = 10;
+        break;
+    case 'N':
+        _month = 11;
+        break;
+    case 'D':
+        _month = 12;
+        break;
+    }
+    _dayOfMonth = StringToUint8(date + 5);
+    _hour = StringToUint8(date + 17);
+    _minute = StringToUint8(date + 20);
+    _second = StringToUint8(date + 23);
+}

firmware/lib/Rtc-master/src/RtcDateTime.h

@@ -0,0 +1,178 @@
+
+
+#ifndef __RTCDATETIME_H__
+#define __RTCDATETIME_H__
+
+// ESP32 complains if not included
+#if defined(ARDUINO_ARCH_ESP32)
+#include <inttypes.h>
+#endif
+
+enum DayOfWeek
+{
+    DayOfWeek_Sunday = 0,
+    DayOfWeek_Monday,
+    DayOfWeek_Tuesday,
+    DayOfWeek_Wednesday,
+    DayOfWeek_Thursday,
+    DayOfWeek_Friday,
+    DayOfWeek_Saturday,
+};
+
+const uint16_t c_OriginYear = 2000;
+const uint32_t c_Epoch32OfOriginYear = 946684800;
+extern const uint8_t c_daysInMonth[] PROGMEM;
+
+class RtcDateTime
+{
+public:
+    RtcDateTime(uint32_t secondsFrom2000 = 0);
+    RtcDateTime(uint16_t year,
+            uint8_t month,
+            uint8_t dayOfMonth,
+            uint8_t hour,
+            uint8_t minute,
+            uint8_t second) :
+            _yearFrom2000((year >= c_OriginYear) ? year - c_OriginYear : year),
+            _month(month),
+            _dayOfMonth(dayOfMonth),
+            _hour(hour),
+            _minute(minute),
+            _second(second)
+    {
+    }
+
+    // RtcDateTime compileDateTime(__DATE__, __TIME__);
+    RtcDateTime(const char* date, const char* time);
+
+    uint16_t Year() const
+    {
+        return c_OriginYear + _yearFrom2000;
+    }
+    uint8_t Month() const
+    {
+        return _month;
+    }
+    uint8_t Day() const
+    {
+        return _dayOfMonth;
+    }
+    uint8_t Hour() const
+    {
+        return _hour;
+    }
+    uint8_t Minute() const
+    {
+        return _minute;
+    }
+    uint8_t Second() const
+    {
+        return _second;
+    }
+    // 0 = Sunday, 1 = Monday, ... 6 = Saturday
+    uint8_t DayOfWeek() const;
+
+    // 32-bit times as seconds since 1/1/2000
+    uint32_t TotalSeconds() const;
+    uint64_t TotalSeconds64() const;
+
+    // add seconds
+    void operator += (uint32_t seconds)
+    {
+        RtcDateTime after = RtcDateTime( TotalSeconds() + seconds );
+        *this = after;
+    }
+
+    // remove seconds
+    void operator -= (uint32_t seconds)
+    {
+        RtcDateTime before = RtcDateTime( TotalSeconds() - seconds );
+        *this = before;
+    }
+
+    // allows for comparisons to just work (==, <, >, <=, >=, !=)
+    operator uint32_t() const
+    {
+        return TotalSeconds();
+    }
+
+    // Epoch32 support
+    uint32_t Epoch32Time() const
+    {
+        return TotalSeconds() + c_Epoch32OfOriginYear;
+    }
+    void InitWithEpoch32Time(uint32_t time)
+    {
+        _initWithSecondsFrom2000<uint32_t>(time - c_Epoch32OfOriginYear);
+    }
+
+    // Epoch64 support
+    uint64_t Epoch64Time() const
+    {
+        return TotalSeconds64() + c_Epoch32OfOriginYear;
+    }
+    void InitWithEpoch64Time(uint64_t time)
+    {
+        _initWithSecondsFrom2000<uint64_t>(time - c_Epoch32OfOriginYear);
+    }
+
+    void InitWithIso8601(const char* date);
+
+    
+    // convert our Day of Week to Rtc Day of Week 
+    // RTC Hardware Day of Week is 1-7, 1 = Monday
+    static uint8_t ConvertDowToRtc(uint8_t dow)
+    {
+        if (dow == 0)
+        {
+            dow = 7;
+        }
+        return dow;
+    }
+
+    // convert Rtc Day of Week to our Day of Week
+    static uint8_t ConvertRtcToDow(uint8_t rtcDow)
+    {
+        return (rtcDow % 7);
+    }
+
+protected:
+    uint8_t _yearFrom2000;
+    uint8_t _month;
+    uint8_t _dayOfMonth;
+    uint8_t _hour;
+    uint8_t _minute;
+    uint8_t _second;
+
+    template <typename T> void _initWithSecondsFrom2000(T secondsFrom2000)
+    {
+        _second = secondsFrom2000 % 60;
+        T timeFrom2000 = secondsFrom2000 / 60;
+        _minute = timeFrom2000 % 60;
+        timeFrom2000 /= 60;
+        _hour = timeFrom2000 % 24;
+        T days = timeFrom2000 / 24;
+        T leapDays;
+
+        for (_yearFrom2000 = 0;; ++_yearFrom2000)
+        {
+            leapDays = (_yearFrom2000 % 4 == 0) ? 1 : 0;
+            if (days < 365U + leapDays)
+                break;
+            days -= 365 + leapDays;
+        }
+        for (_month = 1;; ++_month)
+        {
+            uint8_t daysPerMonth = pgm_read_byte(c_daysInMonth + _month - 1);
+            if (leapDays && _month == 2)
+                daysPerMonth++;
+            if (days < daysPerMonth)
+                break;
+            days -= daysPerMonth;
+        }
+        _dayOfMonth = days + 1;
+    }
+
+};
+
+#endif // __RTCDATETIME_H__

firmware/lib/Rtc-master/src/RtcTemperature.h

@@ -0,0 +1,153 @@
+
+
+#ifndef __RTCTEMPERATURE_H__
+#define __RTCTEMPERATURE_H__
+
+
+class RtcTemperature
+{
+public:
+    // Constructor
+	// a) Merge RTC registers into signed scaled temperature (x256),
+	//    then bind to RTC resolution.
+	//         |         r11h          | DP |         r12h         |
+	// Bit:     15 14 13 12 11 10  9  8   .  7  6  5  4  3  2  1  0  -1 -2
+	//           s  i  i  i  i  i  i  i   .  f  f  0  0  0  0  0  0
+	//
+	// b) Rescale to (x4) by right-shifting (6) bits
+	//         |                                         | DP |    |
+	// Bit:     15 14 13 12 11 10  9  8  7  6  5  4  3  2   .  1  0  -1 -2
+	//           s  s  s  s  s  s  s  i  i  i  i  i  i  i      f  f   0  0
+    RtcTemperature(int8_t highByteDegreesC, uint8_t lowByteDegreesC)
+    {
+        int16_t scaledDegC = ((highByteDegreesC << 8) | (lowByteDegreesC & 0xC0)) >> 6;
+		_centiDegC = scaledDegC * 100 / 4;
+    }
+
+	RtcTemperature(int16_t centiDegC = 0) :
+		_centiDegC(centiDegC)
+	{
+	}
+
+    // Float temperature Celsius
+    float AsFloatDegC()
+    {
+        return (float)_centiDegC / 100.0f;
+    }
+
+	// Float temperature Fahrenheit
+	float AsFloatDegF()
+	{
+		return AsFloatDegC() * 1.8f + 32.0f;
+	}
+
+	// centi degrees (1/100th of a degree), 
+	int16_t AsCentiDegC()
+	{
+		return _centiDegC;
+	}
+
+	void Print(Stream& target, uint8_t decimals = 2, char decimal = '.')
+	{
+		int16_t decimalDivisor = 1;
+		int16_t integerPart;
+		int16_t decimalPart;
+
+		{
+			int16_t rounded = abs(_centiDegC);
+			// round up as needed
+			if (decimals == 0)
+			{
+				rounded += 50;
+			}
+			else if (decimals == 1)
+			{
+				rounded += 5;
+				decimalDivisor = 10;
+			}
+
+			integerPart = rounded / 100;
+			decimalPart = (rounded % 100) / decimalDivisor;
+		}
+
+		// test for zero before printing negative sign to not print-0.00
+		if (_centiDegC < 0 && (integerPart != 0 || decimalPart != 0))
+		{
+			target.print('-');
+		}
+
+		// print integer part
+		target.print(integerPart);
+
+		// print decimal part
+		if (decimals != 0)
+		{
+			target.print(decimal);
+
+			if (decimalPart != 0)
+			{
+				target.print(decimalPart);
+			}
+			else
+			{
+				// append zeros as requested
+				while (decimals > 0)
+				{
+					target.print('0');
+					decimals--;
+				}
+			}
+		}
+	}
+
+	bool operator==(const RtcTemperature& other) const
+	{
+		return (_centiDegC == other._centiDegC);
+	};
+
+	bool operator>(const RtcTemperature& other) const
+	{
+		return (_centiDegC > other._centiDegC);
+	};
+
+	bool operator<(const RtcTemperature& other) const
+	{
+		return (_centiDegC < other._centiDegC);
+	};
+
+	bool operator>=(const RtcTemperature& other) const
+	{
+		return (_centiDegC >= other._centiDegC);
+	};
+
+	bool operator<=(const RtcTemperature& other) const
+	{
+		return (_centiDegC <= other._centiDegC);
+	};
+
+	bool operator!=(const RtcTemperature& other) const
+	{
+		return (_centiDegC != other._centiDegC);
+	};
+
+	RtcTemperature operator-(const RtcTemperature& right)
+	{
+		RtcTemperature result;
+
+		result._centiDegC = (_centiDegC - right._centiDegC);
+		return result;
+	}
+
+	RtcTemperature operator+(const RtcTemperature& right)
+	{
+		RtcTemperature result;
+
+		result._centiDegC = (_centiDegC + right._centiDegC);
+		return result;
+	}
+
+protected:
+    int16_t  _centiDegC;  // 1/100th of a degree temperature (100 x degC)
+};
+
+#endif // __RTCTEMPERATURE_H__

firmware/lib/Rtc-master/src/RtcUtility.cpp

@@ -0,0 +1,34 @@
+
+#include <Arduino.h>
+#include "RtcUtility.h"
+
+uint8_t BcdToUint8(uint8_t val)
+{
+    return val - 6 * (val >> 4);
+}
+
+uint8_t Uint8ToBcd(uint8_t val)
+{
+    return val + 6 * (val / 10);
+}
+
+uint8_t BcdToBin24Hour(uint8_t bcdHour)
+{
+    uint8_t hour;
+    if (bcdHour & 0x40)
+    {
+        // 12 hour mode, convert to 24
+        bool isPm = ((bcdHour & 0x20) != 0);
+
+        hour = BcdToUint8(bcdHour & 0x1f);
+        if (isPm)
+        {
+           hour += 12;
+        }
+    }
+    else
+    {
+        hour = BcdToUint8(bcdHour);
+    }
+    return hour;
+}

firmware/lib/Rtc-master/src/RtcUtility.h

@@ -0,0 +1,19 @@
+
+#ifndef __RTCUTILITY_H__
+#define __RTCUTILITY_H__
+
+// ESP32 complains if not included
+#if defined(ARDUINO_ARCH_ESP32)
+#include <inttypes.h>
+#endif
+
+// for some reason, the DUE board support does not define this, even though other non AVR archs do
+#ifndef _BV
+#define _BV(b) (1UL << (b))
+#endif
+
+extern uint8_t BcdToUint8(uint8_t val);
+extern uint8_t Uint8ToBcd(uint8_t val);
+extern uint8_t BcdToBin24Hour(uint8_t bcdHour);
+
+#endif // __RTCUTILITY_H__