const int touchPin = D2;  // touch sensor
const int ledPin = D0;   // LED

void setup() {
  pinMode(touchPin, INPUT);
  pinMode(ledPin, OUTPUT);
  Serial.begin(9600);
}

void loop() {
  int touchState = digitalRead(touchPin);
  
  if (touchState == HIGH) {
    digitalWrite(ledPin, HIGH);
    Serial.println("touched");
  } else {
    digitalWrite(ledPin, LOW);
    Serial.println("not touched");
  }
  
  delay(50);
}