Adafruit Feather Sketch for sending a reset signal to an Intel NUC using a Non-Latching Relay Featherwing with signal on A2

NUCReset.ino

int SIGNAL = A2;

void setup() {
    // start serial port at 9600 bps and wait for port to open:
  Serial.begin(9600);
  while (!Serial) {
    ; // wait for serial port to connect. Needed for native USB port only
  }

  Serial.println("hello.");

  pinMode(SIGNAL, OUTPUT);
  digitalWrite(SIGNAL, LOW);

}

void loop() {
  if (Serial.available() > 0) {
    int b = Serial.read();
    if (b == 'r') {
      Serial.println("resetting...");
      digitalWrite(SIGNAL, HIGH);
      delay(1000);
      digitalWrite(SIGNAL, LOW);
      Serial.println("reset.");
    }
  }
}