Project #23: E-Textiles – DS3231 Precision RTC – Mk06

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#DonLucElectronics #DonLuc #ETextiles #Wearable #FLORA #MicroOLED #BME280 #CCS811 #RTC #Arduino #Project #Programming #Electronics #Microcontrollers #Consultant

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DS3231 Precision RTC FeatherWing

A Feather board without ambition is a Feather board without FeatherWings. This is the DS3231 Precision RTC FeatherWing it adds an extremely accurate I2C-integrated Real Time Clock (RTC) with a Temperature Compensated Crystal Oscillator (TCXO). This RTC is the most precise you can get in a small, low power package.

Most RTCs use an external 32kHz timing crystal that is used to keep time with low current draw. And that’s all well and good, but those crystals have slight drift, particularly when the temperature changes, the temperature changes the oscillation frequency very very very slightly but it does add up. This RTC is in a beefy package because the crystal is inside the chip, and right next to the integrated crystal is a temperature sensor. That sensor compensates for the frequency changes by adding or removing clock ticks so that the timekeeping stays on schedule.

With a CR1220 12mm coin cell plugged into the top of the FeatherWing, you can get years of precision time keeping, even when main power is lost. Great for datalogging and clocks or anything where you need to really know the time.

DL2204Mk06

1 x FLORA – Version 1.0a
1 x SparkFun Micro OLED
1 x SparkFun Environmental Combo CCS811/BME280
1 x DS3231 Precision RTC FeatherWing
1 x CR1220 Coin Cell Battery
1 x RGB Smart NeoPixel
1 x Half-Size Breadboard
1 x SparkFun Cerberus USB Cable

FLORA – Version 1.0a

SDA – Digital 2
SCL – Digital 3
NEO – Digital 6
VIN – +5V
GND – GND

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DL2204Mk06p.ino

/* ***** Don Luc Electronics © *****
Software Version Information
Project #23: E-Textiles - DS3231 Precision RTC - Mk06
23-06
DL2204Mk06p.ino
1 x FLORA - Version 1.0a
1 x SparkFun Micro OLED
1 x SparkFun Environmental Combo CCS811/BME280
1 x DS3231 Precision RTC FeatherWing
1 x CR1220 Coin Cell Battery
1 x RGB Smart NeoPixel
1 x Half-Size Breadboard
1 x SparkFun Cerberus USB Cable
*/

// Include the Library Code
// Wire
#include <Wire.h>
// NeoPixels
#include <Adafruit_NeoPixel.h>
// SparkFun Micro OLED
#include <SFE_MicroOLED.h>
// SparkFun BME280 - Humidity, Temperature, Altitude and Barometric Pressure
#include <SparkFunBME280.h>
// SparkFun CCS811 - eCO2 & tVOC
#include <SparkFunCCS811.h>
// Date and time DS3231 RTC
#include <RTClib.h>

// NeoPixels
// On digital pin 6
#define PIN 6
// NeoPixels NUMPIXELS = 1
#define NUMPIXELS 1
// Pixels
Adafruit_NeoPixel pixels = Adafruit_NeoPixel(NUMPIXELS, PIN, NEO_GRB + NEO_KHZ800);
// Red
int red = 0;
// Green
int green = 0;
// Blue
int blue = 0;
// Neopix
int iNeo = 0;
// Value
int zz = 0;

// SparkFun Micro OLED
#define PIN_RESET 9
#define DC_JUMPER 1
// I2C declaration
MicroOLED oled(PIN_RESET, DC_JUMPER);

// SparkFun BME280 - Temperature, Humidity, Altitude and Barometric Pressure
BME280 myBME280;
// Temperature Celsius
float BMEtempC = 0;
// Humidity
float BMEhumid = 0;
// Altitude Meters
float BMEaltitudeM = 0;
// Barometric Pressure
float BMEpressure = 0;

// SparkFun CCS811 - eCO2 & tVOC
// Default I2C Address
#define CCS811_ADDR 0x5B 
CCS811 myCCS811(CCS811_ADDR);
// eCO2
float CCS811CO2 = 0;
// TVOC
float CCS811TVOC = 0;

// Date and time functions using a DS3231 RTC
RTC_DS3231 RTC;
String sDate;
String sTime;

// Software Version Information
String sver = "23-06";

void loop() {

  // SparkFun BME280 - Temperature, Humidity, Altitude and Barometric Pressure
  isBME280();

  // SparkFun CCS811 - eCO2 & tVOC
  isCCS811();

  // FLORA
  isFLORA();

  // Dates and Time
  timeRTC();

  // Micro OLED
  isMicroOLED();
 
}

getBME280.ino

// SparkFun BME280 - Temperature, Humidity, Altitude and Barometric Pressure
// isBME280 - Temperature, Humidity, Altitude and Barometric Pressure
void isBME280(){

  // Temperature Celsius
  BMEtempC = myBME280.readTempC();
  // Humidity
  BMEhumid = myBME280.readFloatHumidity() ;
  // Altitude Meters
  BMEaltitudeM = myBME280.readFloatAltitudeMeters();
  // Barometric Pressure
  BMEpressure = myBME280.readFloatPressure();
  
}

getCCS811.ino

// CCS811 - eCO2 & tVOC
// isCCS811 - eCO2 & tVOC
void isCCS811(){

  // This sends the temperature & humidity data to the CCS811
  myCCS811.setEnvironmentalData(BMEhumid, BMEtempC);

  // Calling this function updates the global tVOC and eCO2 variables
  myCCS811.readAlgorithmResults();

  // eCO2 Concentration
  CCS811CO2 = myCCS811.getCO2();
  
  // tVOC Concentration
  CCS811TVOC = myCCS811.getTVOC();
  
}

getFLORA.ino

// FLORA
// isFLORA
void isFLORA() {

  // FLORA = Temperature Celsius
  // BMEtempC

  // FLORA = Temperature Celsius
  if ( BMEtempC >= 50 ) {

    // 40 <= Temperature Celsius < 50~~~
    zz = 2;
    isNUMPIXELS();

  } else if ( BMEtempC >= 40 ) {

    // 30 <= Temperature Celsius < 40
    zz = 3;
    isNUMPIXELS();
    
  }  else if ( BMEtempC >= 30 ) {

    // 20 <= Temperature Celsius < 30
    zz = 4;
    isNUMPIXELS();
    
  } else if ( BMEtempC >= 20 ) {

    // 10 <= Temperature Celsius < 20
    zz = 0;
    isNUMPIXELS();
    
  } else if ( BMEtempC >= 10 ) {

    // ~~~0 <= Temperature Celsius < 10
    zz = 1;
    isNUMPIXELS();
    
  }
    
}

getMicroOLED.ino

// SparkFun Micro OLED
// Setup Micro OLED
void setupMicroOLED() {

  // Initialize the OLED
  oled.begin();
  // Clear the display's internal memory
  oled.clear(ALL);
  // Display what's in the buffer (splashscreen)
  oled.display();

  // Delay 1000 ms
  delay(1000);

  // Clear the buffer.
  oled.clear(PAGE);
  
}
// Micro OLED
void isMicroOLED() {

  // Text Display BME280
  // Clear the display
  oled.clear(PAGE);
  // Set cursor to top-left
  oled.setCursor(0, 0);
  // Set font to type 0
  oled.setFontType(0);
  // Temperature Celsius
  oled.print("T: ");
  oled.print(BMEtempC, 2);
  oled.setCursor(0, 10);
  // Humidity
  oled.print("H: ");
  oled.print(BMEhumid, 0);
  oled.setCursor(0, 20);
  // Altitude Meters
  oled.print("A: ");
  oled.print(BMEaltitudeM, 1);
  oled.setCursor(0, 30);
  // Barometric Pressure
  oled.print("P: ");
  oled.print(BMEpressure, 0);
  oled.display();

  // Delay
  delay( 2000 );

  // Text Display CCS811
  // Clear the display
  oled.clear(PAGE);
  // Set cursor to top-left
  oled.setCursor(0, 0);
  // Set font to type 0
  oled.setFontType(0);
  // Date
  oled.setCursor(0, 0);
  oled.print(sDate);
  // Time
  oled.setCursor(0, 10);
  oled.print(sTime);
  // eCO2 Concentration
  oled.setCursor(0, 20);
  oled.print("C: ");
  oled.print(CCS811CO2, 0);
  // tVOC Concentration
  oled.setCursor(0, 30);
  oled.print("V: ");
  oled.print(CCS811TVOC, 0);  
  oled.display();

  // Delay
  delay( 2000 );

}

getNeopix.ino

// NeoPixels
// Neopix
void isNeopix() 
{ 

    // Pixels
    pixels.setBrightness( 150 );
    // Pixels color takes RGB values, from 0,0,0 up to 255,255,255
    pixels.setPixelColor( iNeo, pixels.Color(red,green,blue) ); 
    // This sends the updated pixel color to the hardware
    pixels.show(); 
    // Delay for a period of time (in milliseconds)
    delay(50);     
  
}
// isNUMPIXELS
void isNUMPIXELS()
{

  // Neopix Value
  switch ( zz ) {  
    case 0:
      // NeoPixels Green
      // Red
      red = 0;
      // Green
      green = 255;
      // Blue
      blue = 0;
      // Neopix
      iNeo = 0;   
      isNeopix();
      break;  
    case 1:
      // NeoPixels Blue
      // Red
      red = 0;
      // Green
      green = 0;
      // Blue
      blue = 255;
      // Neopix
      iNeo = 0;
      isNeopix();
      break;
    case 2:
      // NeoPixels Red
      // Red
      red = 255;
      // Green
      green = 0;
      // Blue
      blue = 0;
      // Neopix
      iNeo = 0;   
      isNeopix();
      break;
    case 3:
      // NeoPixels Yellow
      // Red
      red = 255;
      // Green
      green = 255;
      // Blue
      blue = 0;
      // Neopix
      iNeo = 0;
      isNeopix();
      break;
    case 4:
      // NeoPixels Magenta
      // Red
      red = 255;
      // Green
      green = 0;
      // Blue
      blue = 255;
      // Neopix
      iNeo = 0;
      isNeopix();
      break;
    case 5:
      // NeoPixels Cyan
      // Red
      red = 0;
      // Green
      green = 255;
      // Blue
      blue = 255;
      // Neopix
      iNeo = 0;
      isNeopix();
      break;
    case 6:
      // NeoPixels White
      // Red
      red = 255;
      // Green
      green = 255;
      // Blue
      blue = 255;
      // Neopix
      iNeo = 0;
      isNeopix();    
      break;
  }
  
}
// isNUMPIXELSoff
void isNUMPIXELSoff()
{

   // Black Off
   // NeoPixels
   // Red
   red = 0;
   // Green
   green = 0;
   // Blue
   blue = 0;
   isNeopix();
 
}

getRTCDS3231.ino

// DS3231 Precision RTC
// Setup RTC
void setupRTC() {

  // DS3231 Precision RTC   
  RTC.begin();
  if (! RTC.begin()) {
    while (1);
  }
  
  DateTime now = RTC.now();

  if (RTC.lostPower()) {
    
    // Following line sets the RTC to the date & time this sketch was compiled
    RTC.adjust(DateTime(F(__DATE__), F(__TIME__)));
    // This line sets the RTC with an explicit date & time, for example to set
    // August 2, 2021 at 13:53:0 you would call:
    // RTC.adjust(DateTime(2022, 4, 26, 11, 39, 0));
    
  }
  
}
// timeRTC
void timeRTC() {

    // DS3231 Precision RTC
    sDate = "";
    sTime = "";
    // Date Time
    DateTime now = RTC.now();

    // sData
    sDate += String(now.year(), DEC);
    sDate += "/";
    sDate += String(now.month(), DEC);
    sDate += "/";
    sDate += String(now.day(), DEC);
  
    // sTime
    sTime += String(now.hour(), DEC);
    sTime += ":";
    sTime += String(now.minute(), DEC);
    sTime += ":";
    sTime += String(now.second(), DEC);

}

setup.ino

// Setup
void setup() {

  // NeoPixels
  // This initializes the NeoPixel library
  pixels.begin();
  // Delay for a period of time (in milliseconds)
  delay(50);
  // isNUMPIXELS Off
  isNUMPIXELSoff();

  // Set up I2C bus
  Wire.begin();

  // Delay for a period of time (in milliseconds)
  delay(50);
  // SparkFun BME280 - Temperature, Humidity, Altitude and Barometric Pressure
  myBME280.begin();

  // CCS811 - eCO2 & tVOC
  myCCS811.begin();

  // Setup RTC
  setupRTC();

  // Setup Micro OLED
  setupMicroOLED();

}

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