KY-003 Hall Manyetik Anahtar Modülü (Hall Switch)

const int hallPin = 2;
volatile unsigned int revCount = 0;
unsigned long prevMillis = 0;

void countPulse() {
  revCount++;
}

void setup() {
  Serial.begin(9600);
  pinMode(hallPin, INPUT_PULLUP);
  attachInterrupt(digitalPinToInterrupt(hallPin), countPulse, FALLING);
}

void loop() {
  if (millis() - prevMillis >= 1000) { // Her 1 saniyede bir hesapla
    detachInterrupt(digitalPinToInterrupt(hallPin));
    unsigned int rpm = (revCount * 60);
    revCount = 0;
    prevMillis = millis();
    attachInterrupt(digitalPinToInterrupt(hallPin), countPulse, FALLING);

    Serial.print("Motor Devri: ");
    Serial.print(rpm);
    Serial.println(" RPM");
  }
}