Push Button on RAMPS 1.4

Projects Programming
1

Helly everyone,

I am using a RAMPS 1.4 Shield to power and control my stepper motor. Now I want to add a push button to pause and resume the stepper motor. Therefore, I connected D1 and GND (see image) with a simple switch in between and then used the code below. However, no matter if I press the button or not, the LED will not change. It is always on. The button worked fine on another bord, so I guess either I have to change the code or the pin connection on the board. Do you have any suggestions to solve my problem?

void setup() {
  //start serial connection
  Serial.begin(9600);
  //configure pin 1 as an input and enable the internal pull-up resistor
  pinMode(1, INPUT_PULLUP);
  pinMode(LED_BUILTIN, OUTPUT);

}

void loop() {
  //read the pushbutton value into a variable
  int sensorVal = digitalRead(1);
  //print out the value of the pushbutton
  Serial.println(sensorVal);

  // Keep in mind the pull-up means the pushbutton's logic is inverted. It goes
  // HIGH when it's open, and LOW when it's pressed. Turn on pin LED_BUILTIN when the
  // button's pressed, and off when it's not:
  if (sensorVal == HIGH) {
    digitalWrite(LED_BUILTIN, LOW);
  } else {
    digitalWrite(LED_BUILTIN, HIGH);
  }
}

RAMPS_PINOUT.jpg
RAMPS_PINOUT.jpg2300×3100 949 KB

2

If you use Serial, you should leave D0 and D1 alone.

3

Thanks Whandall for your answer. I already tested a similar code with some other pins but there was always some strange behaviour. However, now I found out that pins D40, D42 and D44 work just fine.