#include <Wire.h>
#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x27, 16,2) ; //(address,ขนาดจอ)

int LED = 19;
int LED2 = 23;
int smoke = 34;
int sensorThres = 1000;  //ตั้ง ค่าความหนาของควัน แก๊ส ก๊าซที่ 400

void setup() {
  Serial.begin(9600);
  pinMode(LED, OUTPUT);
  pinMode(LED2, OUTPUT);
  pinMode(smoke, INPUT);
  lcd.init();             //เชื่อมต่อ i2c lcd กับ ESP32
  lcd.backlight();
}

void loop() {
  int analogSensor = analogRead(smoke);
  Serial.print("Smoke: ");
  Serial.println(analogSensor); 
  lcd.setCursor(0, 0);
  lcd.print("Value :");

  if (analogSensor > 2000)  {
    digitalWrite(LED, HIGH);
    digitalWrite(LED2, HIGH);
    lcd.setCursor(0, 1);
    lcd.print("SMOKE Detected!");
  }
  else if(analogSensor < 1500){ 
    digitalWrite(LED, LOW);
  }
  if (analogSensor < 1300)  {
      digitalWrite(LED2, LOW);
    lcd.setCursor(0, 1);
    lcd.print("               "); 
    } 
  delay(100);
}