const float BETA = 3950;









void setup() {

  Serial.begin(115200);
  Serial.println("Hello, ESP32!");
  analogReadResolution(10);
  pinMode(15, INPUT); //temp sensor
  pinMode(2, INPUT); // lumen sensor
  pinMode(33, OUTPUT); // red led
  pinMode(27, OUTPUT); //green led
  pinMode(25, OUTPUT); //yellow led
  pinMode(26, OUTPUT); //buzzer
  pinMode(21, OUTPUT); //SDA lcd
  pinMode(22, OUTPUT);//SCL lcd


 




}

void loop() {

  int analogValue = analogRead(15);
  int analogValue1 = analogRead(2);
  float celsius = 1 / (log(1 / (1023. / analogValue - 1)) / BETA + 1.0 / 298.15) - 273.15;
  float flamelevel = map(analogValue1, 0, 1024, 100, 0);

  Serial.print("Sensor Fire lumens: ");
  Serial.println(flamelevel, 0);
  Serial.print("Sensor Temp : ");
  Serial.println(celsius, 0);
  if (celsius < 35 && flamelevel < 35) {
    digitalWrite(33, LOW);
    digitalWrite(25, LOW);
    Serial.println("No Smoke No Fire....");
    digitalWrite(27, HIGH);

    lcd.setCursor(11, 0);
    lcd.print("No Fire");
    lcd.setCursor(11, 1);
    lcd.print(flamelevel, 0);
    lcd.print(" %");
    lcd.setCursor(11, 2);
    lcd.print("No Smoke");
    lcd.setCursor(11, 3);
    lcd.print(celsius, 0);
    lcd.print(" %");

  }
   else if (celsius > 35 && flamelevel > 35 && celsius < 50 && flamelevel < 50) {
    digitalWrite(33, LOW);
    Serial.println("Take care the Temp is getting high....");
    digitalWrite(27, LOW);
    digitalWrite(25, HIGH);

  lcd.setCursor(11, 0);
    lcd.print(" WARNING ");
    lcd.setCursor(11, 1);
    lcd.print(flamelevel, 0);
    lcd.print(" %");
    lcd.setCursor(11, 2);
    lcd.print(" WARNING ");
    lcd.setCursor(11, 3);
    lcd.print(celsius, 0);
    lcd.print(" %");




  } 
  else if (celsius > 50 && flamelevel > 50) {
    digitalWrite(33, HIGH);
    Serial.println("Fire alarm....");
    digitalWrite(27, LOW);
    digitalWrite(25, LOW);
    digitalWrite(26, HIGH);
    tone(buzzer,1000);
    lcd.setCursor(11, 0);
    lcd.print(" FIRE ");
    lcd.setCursor(11, 1);
    lcd.print(flamelevel, 0);
    lcd.print(" %");
    lcd.setCursor(11, 2);
    lcd.print(" FIRE ");
    lcd.setCursor(11, 3);
    lcd.print(celsius, 0);
    lcd.print(" %");
  }
  lcd.setCursor(0, 0);
  lcd.print(F("Flame: "));
  lcd.setCursor(0, 1);
  lcd.print(F("Persent: "));

  lcd.setCursor(0, 2);
  lcd.print(F("Temp : "));
  lcd.setCursor(0, 3);
  lcd.print(F("Persent: "));



  delay(700); // this speeds up the simulation