const int analogInputPin = A0; 
const int ledPin = 12; 
int sensorValue = 0;

void setup() {
  Serial.begin(115200);
  pinMode(ledPin, OUTPUT);
}

void loop() {
  sensorValue = analogRead(analogInputPin);

  Serial.print("Giá trị ADC kênh 0: ");
  Serial.println(sensorValue);

  if (sensorValue < 500) { 
    digitalWrite(ledPin, HIGH); 
  } else {
    digitalWrite(ledPin, LOW); 
  }

  delay(1000); 
}