#include <Wire.h> 

#include <LiquidCrystal_I2C.h> 

#include <OneWire.h> 

#include <DallasTemperature.h> 

#include <RH_ASK.h> 

// Pin definitions 

#define ONE_WIRE_BUS 3 // DS18B20 data pin connected to D3 

#define TRANSMIT_PIN 2 // RF transmitter connected to D2 

// Create objects for OneWire and DallasTemperature 

OneWire oneWire(ONE_WIRE_BUS); 

DallasTemperature sensors(&oneWire); 

// Create LCD object 

LiquidCrystal_I2C lcd(0x27, 16, 2); // LCD address 0x27, 16 columns, 2 rows 

// Create RF Transmitter object 

RH_ASK rf_driver; 

void setup() { 

// Start Serial Monitor for debugging 

Serial.begin(9600); 

// Initialize LCD 

lcd.init(); 

lcd.backlight(); 

lcd.setCursor(0, 0); 

lcd.print("Initializing..."); 

// Initialize OneWire and DallasTemperature libraries 

sensors.begin(); 

// Initialize RF Transmitter 

rf_driver.init(); 

delay(2000); // Delay for 2 seconds to show initial message 

lcd.clear(); 

} 

void loop() { 

// Request temperature from DS18B20 sensor 

sensors.requestTemperatures(); 

float temperature = sensors.getTempCByIndex(0); 

// Display temperature on the LCD 

lcd.setCursor(0, 0); 

lcd.print("Temp: "); 

lcd.print(temperature); 

lcd.print(" C"); 

// Prepare data to send via RF 

char tempData[10]; 

dtostrf(temperature, 6, 2, tempData); // Convert float to string 

// Send data via RF 

rf_driver.send((uint8_t *)tempData, strlen(tempData)); 

rf_driver.waitPacketSent(); // Wait for transmission to complete 

// Print temperature to Serial Monitor (for debugging) 

Serial.print("Temperature: "); 

Serial.println(temperature); 

delay(1000); // Update every 1 second 

}