reed_sensor.ino

/**
  Reed Sensor between PIN and GND
*/

// Reed Sensor variables
#define PIN_INPUT_REED_SENSOR 2
boolean reedActivated = false;

void setup() {
  Serial.begin(9600);
  pinMode(PIN_INPUT_REED_SENSOR, INPUT);
  digitalWrite(PIN_INPUT_REED_SENSOR, HIGH);
}

void loop() {
  boolean tempActivated = digitalRead(PIN_INPUT_REED_SENSOR);
  if (tempActivated != reedActivated) {
    reedActivated = tempActivated;
    Serial.println(tempActivated);
  }
}