Temperature & Humidity Sensor With Date & Time on Arduino UNO WiFi R3 ATmega328P+Node MCU ESP8266 CH340G Compatible Board

This setup uses the DHT22 Temperature & Humidity Sensor Module & DS1307 Real Time Clock Module with Arduino UNO WiFi R3 ATmega328P+Node MCU ESP8266 CH340G Compatible Board to provide Ambient Temperature & Humidity readings with time and date at 10 second intervals.

1. Arduino UNO+WiFi R3 ATmega328P+Node MCU ESP8266 CH340G Compatible Board
2. DS1307 RTC
3. DHT22 (AM2302) Temperature & Humidity Sensor
4. M2M Jumper Wires - 04
5. M2F Jumper Wires - 03
6. USB Data Cable

Start IDE and download

1. Adafruit ESP8266 by Adafruit
2. DHT sensor library by Adafruit
3. DS1307 library by Watterott

1. Go to Settings
2. Copy & Paste http://arduino.esp8266.com/stable/package_esp8266com_index.json in Additional boards manager urls

/* special thanks to codebender_cc & Utsource on instructables.com

Arduino UNO+WiFi R3 ATmega328P+Node MCU ESP8266 CH340G Compatible Board

DS1307 RTC

DHT22 (AM2302) Temperature & Humidity Sensor

Connections

DS1307

SCL - SCL

SDA - SDA

VCC - 3.5V

GND - GND

DHT22

+ - 5V

OUT - 2

- - GND

Libraries

Adafruit ESP8266 by Adafruit

DHT sensor library by Adafruit

DS1307 library by Watterott

Procedure

Make connections

Download libraries

Install Board Manager (in Settings - Additional Boards Manager urls) from http://arduino.esp8266.com/stable/package_esp8266com_index.json

Connect USB

Select Arduino Uno (Boards)

Select Port

Turn Dip Switch 3 & 4 'On'

Copy Paste sketch to IDE

Upload

*/

#include <Wire.h>

#include <DS1307.h>

#include <DHT.h>;

//Variables

int chk;

float hum; //Stores humidity value

float temp; //Stores temperature value

//Constants

#define DHTPIN 2 // what pin we're connected to

#define DHTTYPE DHT22 // DHT 22 (AM2302)

DHT dht(DHTPIN, DHTTYPE); //// Initialize DHT sensor for normal 16mhz Arduino

DS1307 rtc;

void setup()

{

//init Serial port

Serial.begin(9600);

//init RTC

rtc.begin();

//Serial.println("\nInit RTC..."); //optional

//init DHT

dht.begin();

//Serial.println("\nInit DHT..."); //optional

//set time and date

//rtc.set(0, 59, 17, 29, 5, 2025); //sec, min, hour, day, month, year

//only set the date time one time if using button cell on DS1307

//stop/pause RTC

//rtc.stop();

//start RTC initially

//rtc.start();

}

void loop()

{

uint8_t sec, min, hour, day, month;

uint16_t year;

//get time from RTC

rtc.get(&sec, &min, &hour, &day, &month, &year);

//Print time and date

Serial.print("\n");

Serial.print("\nDate: ");

Serial.print(day, DEC);

Serial.print(".");

Serial.print(month, DEC);

Serial.print(".");

Serial.print(year, DEC);

Serial.print(" Time: ");

Serial.print(hour, DEC);

Serial.print(":");

Serial.print(min, DEC);

Serial.print(":");

Serial.print(sec, DEC);

//get data from DHT22 and store it to variables hum and temp

hum = dht.readHumidity();

temp= dht.readTemperature();

//Print temp and humidity

Serial.print(" Humidity: ");

Serial.print(hum);

Serial.print("%");

Serial.print(" Temp: ");

Serial.print(temp);

Serial.print("° Celsius");

//wait 10 seconds

delay(10000);

}

1. Connect Jumper Cables as in Step 3 - Connections
2. Connect Board to Computer using USB Cable
3. Turn Dip Switch 3 & 4 'On'
4. Select board Arduino Uno
5. Select Port
6. Remove '//' from //rtc.set(0, 59, 17, 29, 5, 2025);
7. Amend time & date
8. Upload sketch
9. Turn Dip Switch 4 'Off'

Cheers!