Hall Effect Sensor (KY-003)

// Hall Effect Sensor (KY-003)
// Board: Arduino UNO
// Read digital output from the sensor module.

const int SENSOR_PIN = 2;

void setup() {
  Serial.begin(9600);
  pinMode(SENSOR_PIN, INPUT);
}

void loop() {
  int state = digitalRead(SENSOR_PIN);
  Serial.print("Sensor state: ");
  Serial.println(state);
  delay(300);
}