Arduino: How to use KY-024 Linear Magnetic Hall Module

				
					const int DIGITAL_PIN = 7; // D0 Output
const int ANALOG_PIN = A0; // A0 Output
const int LED_PIN = 13;    // Built-in LED
const int CENTER_VALUE = 512; // Baseline ADC value (no field)

void setup() {
  pinMode(LED_PIN, OUTPUT);
  pinMode(DIGITAL_PIN, INPUT);
  Serial.begin(9600);
  Serial.println("KY-024 Linear Hall Sensor Ready! Calibrate Digital Threshold.");
}

void loop() {
  // 1. Read Analog State (A0)
  int analogValue = analogRead(ANALOG_PIN);
  int deviation = analogValue - CENTER_VALUE; // Deviation from the center (512)

  // 2. Read Digital State (D0)
  // Digital state is set by the potentiometer threshold.
  // We assume LOW means the magnetic field has exceeded the set threshold.
  int digitalState = digitalRead(DIGITAL_PIN);

  // Control LED based on Digital Output (Action Trigger)
  if (digitalState == LOW) {
    digitalWrite(LED_PIN, HIGH); // Turn LED ON (Magnetic Field Exceeded Threshold)
  } else {
    digitalWrite(LED_PIN, LOW);  // Turn LED OFF
  }

  // Print both outputs to the Serial Monitor
  Serial.print("Analog (A0): ");
  Serial.print(analogValue);
  Serial.print(" | Deviation: ");
  Serial.print(deviation);
  Serial.print(" | Digital State (D0): ");
 
  if (digitalState == LOW) {
    Serial.println("TRIGGERED (LOW)");
  } else {
    Serial.println("CLEAR (HIGH)");
  }
 
  delay(100);
}