/*
   Forum: https://forum.arduino.cc/t/ky-032-obstacle-avoidance-sensor-not-working/1173727/7
   Wokwi: https://wokwi.com/projects/377386960545098753

   Simple test environment to count pulses using an interrupt

*/

constexpr byte inPin = 3;
unsigned long lastTime =0;

volatile unsigned long count = 0;

void ISRroutine(){
  count++;
};


void setup() {
  // put your setup code here, to run once:
  Serial .begin(115200);
  Serial.println("Start");
  pinMode(inPin, INPUT_PULLUP);
  attachInterrupt(digitalPinToInterrupt(inPin),ISRroutine,RISING);
  lastTime = millis();
}

void loop() {
  // put your main code here, to run repeatedly:
  if (millis()-lastTime >= 1000){
    noInterrupts();
    unsigned long lastCount = count;
     lastTime = millis();
     count =0;
     interrupts();
     Serial.println(lastCount);
  }

}