const byte pin_pmp_smpt_01 = 23;
const byte pin_pmp_smpt_02 = 22;
const byte pin_pmp_smpt_03 = 21;

const byte LED1 = 2;
char LED_stat;

int tnd = 500;

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");

  pinMode(pin_pmp_smpt_01, OUTPUT);
  pinMode(pin_pmp_smpt_02, OUTPUT);
  pinMode(pin_pmp_smpt_03, OUTPUT);
}

void loop() {
Serial.println("Suhu: ");

  if (Serial.available() == 0) {};

  LED_stat = Serial.read();

  Serial.println(LED_stat);

  if (LED_stat == '0'){
    digitalWrite(pin_pmp_smpt_01, LOW);
    digitalWrite(pin_pmp_smpt_02, LOW);
    digitalWrite(pin_pmp_smpt_03, LOW);
  } else if (LED_stat == '1'){
    digitalWrite(pin_pmp_smpt_01, HIGH);
    digitalWrite(pin_pmp_smpt_02, LOW);
    digitalWrite(pin_pmp_smpt_03, LOW);
  } else if (LED_stat == '2'){
    digitalWrite(pin_pmp_smpt_01, LOW);
    digitalWrite(pin_pmp_smpt_02, HIGH);
    digitalWrite(pin_pmp_smpt_03, LOW);
  } else if (LED_stat == '3'){
    digitalWrite(pin_pmp_smpt_01, LOW);
    digitalWrite(pin_pmp_smpt_02, LOW);
    digitalWrite(pin_pmp_smpt_03, HIGH);
  }
}