//Muhammad Raqhib hamdi
//2021230037
//Unsada Teknologi Informasi
//Lab 3.7 ESP 32

int ledMerah = 2;
int ledKuning = 3;
int ledHijau = 4;
int buzzerPin = 18;
int potensioPin = 34;
int val = 0;

void setup() {
  Serial.begin(9600);
  pinMode(ledMerah, OUTPUT);
  pinMode(ledKuning, OUTPUT);
  pinMode(ledHijau, OUTPUT);
  pinMode(buzzerPin, OUTPUT);
}

void loop() {
  val = analogRead(potensioPin);
  int nilaipot = val / 4;
  int kecerahan = map(nilaipot, 0, 1023, 0, 255);
  
  digitalWrite(ledMerah, HIGH);
  digitalWrite(ledKuning, LOW);
  digitalWrite(ledHijau, LOW);
  noTone(buzzerPin);

  if (kecerahan > 128 && kecerahan <= 191) {
    digitalWrite(ledMerah, LOW);
    digitalWrite(ledKuning, HIGH);
    digitalWrite(ledHijau, LOW);
  } else if (kecerahan > 191 && kecerahan <= 200) {
    digitalWrite(ledMerah, LOW);
    digitalWrite(ledKuning, LOW);
    digitalWrite(ledHijau, HIGH);
  } else if (kecerahan > 200) {
    digitalWrite(ledMerah, HIGH);
    digitalWrite(ledKuning, LOW);
    digitalWrite(ledHijau, LOW);
    tone(buzzerPin, 400);
  }

  Serial.println(val);
}