void setup() {
pinMode(12, OUTPUT);
pinMode(3, INPUT_PULLUP);
Serial.begin(9600);
}
void loop() {
int x = digitalRead(3);
if (x==0)
{
digitalWrite(12, LOW);
Serial.println("switch OFF, LED OFF");
}
else{
digitalWrite(12, HIGH);
Serial.println("switch ON, LED ON");
}
}