const int hallPin = A0;     // hall effect sensor out pin
int hallState = 0;         // Initial hall sensor status

void setup() {
  
Serial.begin(9600); // The hall effect sensor pin as an input  
pinMode(hallPin, INPUT);
}

void loop(){
  
  hallState = analogRead(hallPin); // reading the state of the hall effect sensor pin
    
    Serial.println(hallState);
    Serial.println("detect");  //
    delay(200);
    
    }