#include <OneWire.h>
   #include <LiquidCrystal_I2C.h>

   #define ONE_WIRE_BUS 2 // Replace with the actual pin connected to the DS18B20
   OneWire oneWire(ONE_WIRE_BUS);
   LiquidCrystal_I2C lcd(0x27, 20, 4); // Replace with the actual LCD address if different

   void setup() {
     lcd.begin(20, 4); // Initialize the LCD
     lcd.print("Temperature:"); // Display a message on the LCD
   }

   void loop() {
     float temperature = getTemperature();
     lcd.setCursor(0, 1); // Set the cursor to the second line of the LCD
     lcd.print("Temp: ");
     lcd.print(temperature);
     lcd.print("C");
     delay(1000); // Delay for 1 second before updating the temperature
   }

   float getTemperature() {
     byte data[9];
     float temp;

     if (oneWire.reset()) {
       oneWire.write(0xCC); // Skip ROM command
       oneWire.write(0x44); // Start temperature conversion
       delay(750); // Wait for temperature conversion to complete

       oneWire.reset();
       oneWire.write(0xCC); // Skip ROM command
       oneWire.write(0xBE); // Read scratchpad command

       for (int i = 0; i < 9; i++) {
         data[i] = oneWire.read(); // Read 9 bytes of data from the DS18B20
       }

       temp = ((data[1] << 8) | data[0]) * 0.0625; // Calculate the temperature
     }

     return temp;
   }