If you are designing your own intelligent “Graden Computer” with an optional digital plant moisture sensor/water pump controller that lights an LED to alert the user when it is time to water a potted ...

Once you plug the USB cable in to your computer (with the other end plugged in to the Arduino board), it should show up in the Arduino IDE under Tools→Serial ... the // ASCII value serialEvent(); } } ...

You can read the state of a button using Arduino ... INPUT); Serial.begin(9600); } void loop() { int stateButton = digitalRead(pinButton); Serial.println(stateButton); delay(20); } In the loop() we ...