Code Challenge - Simple hall sensor mission- unsolved right now

[dudilevi85]

Hey,
Im new with arduino and I looking for someone to wrote the code for my simple mission - Unfortunatley I failed and I hope somone will solve it for me.

The connnections:

1. pin 3 (Input) Hall sensor
2. 5v and ground connected to the other 2 legs

• I have tested with simple code and while the magnet is on - the hallstate is 0 (as expected).

The mission is using with Serial.begin / Serial.println

1. starting with printing the monitor the word "Right" - with loop- do not stop until the triger in the next line.
2. When the digitalwrite in the hall sensor is equal to 0 >> the monitor will write "Stop" for 10 seconds.
3. Now the main challenge is no matter what is the hall sensor state 0 or 1 the monitor will show "left" but not right in the former loop.
4. the monitor show the word "left" - with loop- do not stop until the triger in the next line.
5. When the digitalwrite in the hall sensor is equal to 0 >> the monitor will write "Stop" for 10 seconds.

End of mission

Thanks for the solvers in advance!!!

[red_car]

sounds like a school project.. what have you tried so far?

post your attempts... everyone love a trier.

[lastchancename]

If you are planning to take this further in the future, begin thinking about a ‘state-machine’ as the core of your logic.

The first thing to understand is the input difference between off, on and changing between the two. (State change detection)

[sherzaad]

hopefully code(s) on this link might give you some ideas on how to do just that!

How to use Hall Effect Sensor with Arduino

hope that helps...

[dudilevi85]

Thanks guys!

I have tried this script but I cant stop the loop after the stop sentence. I looking for option to exit the loop for the former cases. It is the begginnig but doesnt answer that challenge.

const int hallpin = 2;

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

void loop() {

Serial.println ("right");

if (digitalRead(hallpin) == 0) {
Serial.println ("stop");
delay (2000);

}
}

[sherzaad]

crude but something like this you mean?

const int hallpin = 2;

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

void loop() {

  Serial.println ("right");

  if (digitalRead(hallpin) == 0) {
    Serial.println ("stop");
    while(digitalRead(hallpin) == 0) delay(100); //wait here till till the hallpin state changes
  }
  
  delay (2000); //"right" printed to serial monitor every 2s while hallpin == 1
}

hope that helps...