Don Luc Electronics
The Alpha Geek – Geeking Out

Project #15: Environment – RTC – Mk26

Published February 12, 2025 | By DonLuc

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#DonLucElectronics #DonLuc #Arduino #RTC #EEPROM #DHT11 #ASM #Display #Elecrow #Project #Patreon #Electronics #Microcontrollers #IoT #Fritzing #Programming #Consultant

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RTC

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RTC

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RTC

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Crowtail – RTC 2.0

If you want to make your own electronic watch a RTC module is necessary to generate you the right time, with very low power consumption. This tiny RTC module is based on the clock chip DS1307 which communicates with microcontrollers with I2C protocol. The clock/calendar provides seconds, minutes, hours, day, date, month, and year information. The end of the month date is automatically adjusted for months with fewer than 31 days, including corrections for leap year. This module is really low power consumption, it can serves you more than a month with a CR1220 battery.

DL2502Mk02

1 x Crowduino Uno – SD
1 x Crowtail – Base Shield
1 x Crowtail – RTC 2.0
1 x Crowtail – Temperature and Humidity Sensor 2.0
1 x Crowtail – Rotary Angle Sensor 2.0
1 x Crowtail – Moisture Sensor 2.0
1 x Crowtail – I2C LCD
1 x Crowtail – LED(Green)
1 x Crowtail – LED(Yellow)
1 x USB Battery Pack
1 x USB Mini-B Cable

Crowduino Uno – SD

SCL – A5
SDA – A4
POT – A1
ASM – A0
LEDY – 7
LEDG – 6
ITH – 5
VIN – +5V
GND – GND

DL2502Mk02p

DL2502Mk02p.ino

/****** Don Luc Electronics © ******
Software Version Information
Project #15: Environment – RTC – Mk26
DL2502Mk02p.ino
DL2502Mk02
1 x Crowduino Uno - SD
1 x Crowtail - Base Shield
1 x Crowtail - RTC 2.0
1 x Crowtail - Temperature and Humidity Sensor 2.0
1 x Crowtail - Rotary Angle Sensor 2.0
1 x Crowtail - Moisture Sensor 2.0
1 x Crowtail - I2C LCD
1 x Crowtail - LED(Green)
1 x Crowtail - LED(Yellow)
1 x USB Battery Pack
1 x USB Mini-B Cable
*/

// Include the Library Code
// EEPROM library to read and write EEPROM with unique ID for unit
#include <EEPROM.h>
// Wire
#include <Wire.h>
// Liquid Crystal
#include "LiquidCrystal.h"
// Temperature and Humidity Sensor
#include "DHT.h"
// RTC (Real-Time Clock)
#include "RTClib.h"

// RTC (Real-Time Clock)
RTC_DS1307 RTC;
String dateRTC = "";
String timeRTC = "";

// Temperature and Humidity Sensor
#define DHTPIN 5
// DHT 11
#define DHTTYPE DHT11
DHT dht(DHTPIN, DHTTYPE);
// Temperature and Humidity Sensor
float h = 0;
float t = 0;

// Potentiometer
int iPotentiometer = A1;
// Change Your Threshold Here
int Threshold = 0;
int zz = 0;

// Liquid Crystal
// Connect via i2c
LiquidCrystal lcd(0);

// Crowtail Moisture Sensor
int iSoilMoisture = A0;
int iSoilMoistureVal = 0;

// LED Yellow
int iLEDYellow = 7;

// LED Green
int iLEDGreen = 6;

// EEPROM Unique ID Information
String uid = "";

// Software Version Information
String sver = "15-26";

void loop() {

  // Crowtail Moisture Sensor
  isSoilMoisture();

  // Temperature and Humidity Sensor
  isTH();

  // RTC (Real-Time Clock)
  isRTC();

  // Delay 2 Second
  delay( 2000 );

  // Display Temperature and Humidity
  isDisplayTH();

  // Delay 2 Second
  delay( 2000 );

  // Display EEPROM
  isDisplayEEPROM();

  // Delay 2 Second
  delay( 2000 );

  // Display RTC
  isDisplayRTC();

  // Delay 2 Second
  delay( 2000 );

}

getDisplay.ino

/****** Don Luc Electronics © ******
Software Version Information
Project #15: Environment – RTC – Mk26
DL2502Mk02p.ino
DL2502Mk02
1 x Crowduino Uno - SD
1 x Crowtail - Base Shield
1 x Crowtail - RTC 2.0
1 x Crowtail - Temperature and Humidity Sensor 2.0
1 x Crowtail - Rotary Angle Sensor 2.0
1 x Crowtail - Moisture Sensor 2.0
1 x Crowtail - I2C LCD
1 x Crowtail - LED(Green)
1 x Crowtail - LED(Yellow)
1 x USB Battery Pack
1 x USB Mini-B Cable
*/

// Include the Library Code
// EEPROM library to read and write EEPROM with unique ID for unit
#include <EEPROM.h>
// Wire
#include <Wire.h>
// Liquid Crystal
#include "LiquidCrystal.h"
// Temperature and Humidity Sensor
#include "DHT.h"
// RTC (Real-Time Clock)
#include "RTClib.h"

// RTC (Real-Time Clock)
RTC_DS1307 RTC;
String dateRTC = "";
String timeRTC = "";

// Temperature and Humidity Sensor
#define DHTPIN 5
// DHT 11
#define DHTTYPE DHT11
DHT dht(DHTPIN, DHTTYPE);
// Temperature and Humidity Sensor
float h = 0;
float t = 0;

// Potentiometer
int iPotentiometer = A1;
// Change Your Threshold Here
int Threshold = 0;
int zz = 0;

// Liquid Crystal
// Connect via i2c
LiquidCrystal lcd(0);

// Crowtail Moisture Sensor
int iSoilMoisture = A0;
int iSoilMoistureVal = 0;

// LED Yellow
int iLEDYellow = 7;

// LED Green
int iLEDGreen = 6;

// EEPROM Unique ID Information
String uid = "";

// Software Version Information
String sver = "15-26";

void loop() {

  // Crowtail Moisture Sensor
  isSoilMoisture();

  // Temperature and Humidity Sensor
  isTH();

  // RTC (Real-Time Clock)
  isRTC();

  // Delay 2 Second
  delay( 2000 );

  // Display Temperature and Humidity
  isDisplayTH();

  // Delay 2 Second
  delay( 2000 );

  // Display EEPROM
  isDisplayEEPROM();

  // Delay 2 Second
  delay( 2000 );

  // Display RTC
  isDisplayRTC();

  // Delay 2 Second
  delay( 2000 );

}

getEEPROM.ino

// EEPROM
// isUID EEPROM Unique ID
void isUID() {
  
  // Is Unit ID
  uid = "";
  for (int x = 0; x < 7; x++)
  {
    uid = uid + char(EEPROM.read(x));
  }
  
}

getRTC.ino

// RTC (Real-Time Clock)
// Setup RTC
void isSetupRTC(){

  // RTC (Real-Time Clock)
  RTC.begin();

  // RTC Running
  if (! RTC.isrunning()) {
    
    // following line sets the RTC to the date & time
    //this sketch was compiled
    RTC.adjust(DateTime(__DATE__, __TIME__));
    // This line sets the RTC with an explicit date & time, for example to set
    // January 21, 2014 at 3am you would call:
    // RTC.adjust(DateTime(2014, 1, 21, 3, 0, 0))
    
  }
  
}
// RTC (Real-Time Clock)
void isRTC(){

  // RTC (Real-Time Clock)
  DateTime now = RTC.now();
  
  // Date
  dateRTC = now.year(), DEC; 
  dateRTC = dateRTC + "/";
  dateRTC = dateRTC + now.month(), DEC;
  dateRTC = dateRTC + "/";
  dateRTC = dateRTC + now.day(), DEC;
  
  // Time
  timeRTC = now.hour(), DEC;
  timeRTC = timeRTC + ":";
  timeRTC = timeRTC + now.minute(), DEC;
  timeRTC = timeRTC + ":";
  timeRTC = timeRTC + now.second(), DEC;

}

getSoilMoisture.ino

// Crowtail Moisture Sensor
// Soil Moisture
void isSoilMoisture(){

  // Connect Soil Moisture Sensor to Analog 0
  // iSoilMoistureVal => 0~700 Soil Moisture
  iSoilMoistureVal = analogRead( iSoilMoisture );

  // Threshold => 200~500
  zz = analogRead( iPotentiometer );
  Threshold = map( zz, 0, 1024, 200, 500);

  // Threshold
  if (iSoilMoistureVal > Threshold) {

    // 300~700 - Humid Soil
    // LED Yellow
    digitalWrite(iLEDYellow, LOW);
    // Display Green
    isDisplayG();
    // LED Green
    digitalWrite(iLEDGreen, HIGH);
    
  }
  else {
    
    // 0-300 Dry Soil
    // LED Green
    digitalWrite(iLEDGreen, LOW);
    // Display Yellow
    isDisplayY();
    digitalWrite(iLEDYellow, HIGH);
    
  }

}

getTH.ino

// Temperature and Humidity Sensor
void isTH(){

  // Temperature
  t = dht.readTemperature();
  // Humidity
  h = dht.readHumidity();
  
}

setup.ino

// Setup
void setup()
{
 
  // Delay
  delay(100);
  
  // isUID EEPROM Unique ID
  isUID();
  
  // Delay
  delay(100);

  // Initialize the LED iLED Yellow
  pinMode(iLEDYellow, OUTPUT);

  // Initialize the LED LED Green
  pinMode(iLEDGreen, OUTPUT);

  // Temperature and Humidity Sensor
  dht.begin();

  // Delay
  delay(100);
  
  // Setup RTC
  isSetupRTC();
  
  // Delay
  delay(100);

  // Display UID
  isDisplayUID();
  
  // Delay 5 Second
  delay( 5000 );

}

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People can contact us: https://www.donluc.com/?page_id=1927

Electronics, IoT, Teacher, Instructor, R&D and Consulting

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