NRF24L01 Based Digital Temperature Monitoring System

NRF24L01 Based Digital Temperature Monitoring  System 

Circuit Diagram :-

Transmitter Circuit 

Receiver Circuit

Transmitter Code

//Prateek //www.prateeks.in //Transmitter #include <SPI.h> #include <nRF24L01.h> #include <RF24.h> #include "DHT.h" const uint64_t pipeOut = 0xE8E8F0F0E1LL; #define DHTPIN 7 #define DHTTYPE DHT11 DHT dht(DHTPIN, DHTTYPE); RF24 radio(9, 10); // CN and CSN pins of nrf struct MyData { byte h; byte t; }; MyData data; void setup() { Serial.begin(9600); dht.begin(); radio.begin(); radio.setAutoAck(false); radio.setDataRate(RF24_250KBPS); radio.openWritingPipe(pipeOut); } void loop() { data.h = dht.readHumidity(); data.t = dht.readTemperature(); if (isnan(data.h) || isnan(data.t)){ Serial.println(F("Failed to read from DHT sensor!")); return; } Serial.print("Humidity: "); Serial.print(data.h); Serial.print("Temperature: "); Serial.print(data.t); radio.write(&data, sizeof(MyData)); }


Receiver Code
//Parteek //www.prateeks.in //Receiver #include <SPI.h> #include <nRF24L01.h> #include <RF24.h> #include <Wire.h> #include <LiquidCrystal_I2C.h> LiquidCrystal_I2C lcd(0x27, 16, 2); const uint64_t pipeIn = 0xE8E8F0F0E1LL; RF24 radio(9, 10); struct MyData { byte h; byte t; }; MyData data; void setup() { Serial.begin(9600); radio.begin(); lcd.init(); lcd.backlight(); lcd.clear(); radio.setAutoAck(false); radio.setDataRate(RF24_250KBPS); radio.openReadingPipe(1, pipeIn); radio.startListening(); //lcd.println("Receiver "); } void recvData() { if ( radio.available() ) { radio.read(&data, sizeof(MyData)); } } void loop() { recvData(); lcd.setCursor(0,0); Serial.print("Temperature: "); Serial.print(data.t); lcd.print("Temperature:"); lcd.print(data.t); lcd.print("'C"); Serial.print("Humidity: "); Serial.print(data.h); lcd.setCursor(0,1); lcd.print("Humidity:"); lcd.print(data.h); lcd.print("%"); //Serial.print("\n"); }