#define pinSwitch 2
#define pinRelay 3

void setup() {
  Serial.begin(115200);
  pinMode(pinSwitch, INPUT_PULLUP);
  pinMode(pinRelay, OUTPUT);
}

void loop() {
  //int nilaiSwitch = !digitalRead((pinSwitch));
  digitalWrite(pinRelay, !digitalRead(pinSwitch));
  Serial.println(!digitalRead(pinSwitch));

  delay(100);
}