const int pulsePin = 2;     // Pin where pulses are received
volatile unsigned long pulseCount = 0;

void setup() {
  pinMode(pulsePin, INPUT);
  attachInterrupt(digitalPinToInterrupt(pulsePin), countPulse, RISING);  // Count on rising edge
  Serial.begin(9600);
}

void loop() {
  // Print the pulse count every second
  Serial.print("Pulse Count: ");
  Serial.println(pulseCount);
  delay(1000);
}

void countPulse() {
  pulseCount++;
 
}