const int ldr = 34;
int adcVal ;
float voltage;
const int led = 27;

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  pinMode(led, OUTPUT);
}

void loop() {
  delay(10);
  adcVal = analogRead(ldr);
  voltage = (float(adcVal)/4095)*3.3;
  Serial.println(voltage);
   if (voltage > 1.5) {
    digitalWrite(led, HIGH);  // Nyalakan LED
  } else {
    digitalWrite(led, LOW);   // Matikan LED
  }
}