#include <Wire.h>
#include <LiquidCrystal_I2C.h>

// Initialize the LCD. Change the I2C address if needed (default 0x27)
LiquidCrystal_I2C lcd(0x27, 16, 2); 

// Temperature sensor pins
const int sensorPin1 = A0;
const int sensorPin2 = A1;
const int sensorPin3 = A2;

// Function to convert analog value to temperature (assuming LM35 sensor)
float readTemperature(int sensorPin) {
  int analogValue = analogRead(sensorPin);
  // Convert the analog value to voltage
  float voltage = analogValue * (5.0 / 1023.0);
  // Convert voltage to temperature (LM35: 10mV per degree Celsius)
  float temperature = voltage * 100.0;
  return temperature;
}

void setup() {
  // Initialize the LCD
  lcd.begin(16, 2);
  lcd.backlight(); // Turn on the backlight (if applicable)
  R2=0;
}

void loop() {
  // Read temperatures from the sensors
  float temperature1 = readTemperature(sensorPin1);
  float temperature2 = readTemperature(sensorPin2);
  float temperature3 = readTemperature(sensorPin3);

  // Clear the LCD
  lcd.clear();
  
  // Print temperatures to the LCD
  R2 = temperature1 * (1023.0 / (temperature1) - 1.0);
  lcd.setCursor(0, 0);
  lcd.print("Temp 1: ");
  lcd.print(R2);
  lcd.print(" C");

  lcd.setCursor(0, 1);
  lcd.print("Temp 2: ");
  lcd.print(temperature2);
  lcd.print(" C");

  //lcd.setCursor(8, 2);
  //lcd.print("Temp 3: ");
  //lcd.print(temperature3);
  //lcd.print(" C");

  // Wait before the next update
  delay(2000);
}