#include <LiquidCrystal.h>

const int tempPin = A0; 
const int lightPin = A1; 
const int buttonPin = 2; 
const int ledPin = 13;

float tempThreshold = 30.0; 
int lightThreshold = 500;   

volatile bool interruptFlag = false; 


LiquidCrystal lcd(7, 8, 9, 10, 11, 12);

void setup() {
  Serial.begin(9600);
  pinMode(buttonPin, INPUT_PULLUP); 
  pinMode(ledPin, OUTPUT); 
  attachInterrupt(digitalPinToInterrupt(buttonPin), handleInterrupt, FALLING); 


  lcd.begin(16, 2);
  lcd.print("Temp: "); 
  lcd.setCursor(0, 1); 
  lcd.print("Light: "); 
}

void loop() {
  int tempValue = analogRead(tempPin);
  int lightValue = analogRead(lightPin);


  float temperature = (tempValue * 5.0 * 100.0) / 1024.0;
  Serial.print("Temperature: ");
  Serial.print(temperature); 
  Serial.println(" °C"); 

  Serial.print("Light Level: ");
  Serial.println(lightValue); 

  // Update LCD display
  lcd.setCursor(6, 0);
  lcd.print(temperature); 
  lcd.print(" C"); 
  lcd.setCursor(7, 1); 
  lcd.print(lightValue); 

  // Check if temperature exceeds threshold
  if (temperature > tempThreshold) {
    Serial.println("Temperature threshold exceeded!"); 
    digitalWrite(ledPin, HIGH); 
  } else {
    digitalWrite(ledPin, LOW); 
  }

  // Check if light level exceeds threshold
  if (lightValue > lightThreshold) {
    Serial.println("Light threshold exceeded!"); 
    digitalWrite(ledPin, HIGH); 
  } else {
    digitalWrite(ledPin, LOW); 
  }

 
  if (interruptFlag) {
    Serial.println("Interrupt detected!"); 
    lcd.setCursor(0, 0);
    lcd.print("Interrupt! ");
    interruptFlag = false; 
  }

  delay(1000); 
}


void handleInterrupt() {
  interruptFlag = true; 
}