#define ledPin 4
#define sensorPin 2
int sensorValue = 0;  // variable to store the value coming from the sensor

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");
  pinMode(ledPin, OUTPUT);  //輸出LED
  pinMode(sensorPin, INPUT); //輸入可變電阻器
}

void loop() {
  sensorValue = analogRead(sensorPin);
  Serial.println(sensorValue);
  // turn the ledPin on
  digitalWrite(ledPin, HIGH);
  // stop the program for <sensorValue> milliseconds:
  delay(sensorValue);
  // turn the ledPin off:
  digitalWrite(ledPin, LOW);
  // stop the program for for <sensorValue> milliseconds:
  delay(sensorValue);
}