#include <OneWire.h>
#include <LiquidCrystal.h>

// Data wire for the DS18B20 temperature sensor
#define ONE_WIRE_BUS 2

// Setup a oneWire instance to communicate with DS18B20
OneWire oneWire(ONE_WIRE_BUS);

// LCD module connections (modify these for your specific module)
LiquidCrystal lcd(8, 9, 4, 5, 6, 7);

void setup() {
  // Initialize the LCD
  lcd.begin(16, 2);
  
  // Search for the address of the DS18B20
  if (!oneWire.search()) {
    lcd.print("No sensor found");
    while (1); // Stop here if no sensor is found
  }
  
  // Reset the search to prepare for the next search
  oneWire.reset_search();
}

void loop() {
  byte i;
  byte present = 0;
  byte type_s;
  byte data[12];
  byte addr[8];

  // Search for the next DS18B20 sensor
  if (!oneWire.search()) {
    // No more sensors found, reset search
    oneWire.reset_search();
    delay(250);
    return;
  }

  // Check if the found sensor is a DS18B20
  if (oneWire.reset() == 0) {
    if (oneWire.read(0) == 0x10) {
      type_s = 1;
    } else {
      type_s = 0;
    }

    oneWire.reset();
    oneWire.select(addr);
    oneWire.write(0x44, 1); // Start temperature conversion
    delay(800); // Wait for conversion to complete

    present = oneWire.reset();
    oneWire.select(addr);
    oneWire.write(0xBE); // Read Scratchpad

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

    int16_t raw = (data[1] << 8) | data[0];
    int16_t temperature = raw / 16.0;

    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print("Temp: ");
    lcd.print(temperature);
    lcd.print("C");
  }
  delay(1000); // Update temperature every second
}