hyvee-new.ino

const int sensorPin = 9;  // PW socket on sensor board
const int relayPin = 10;  //
const int threshold = 48;  //
const bool DEBUG = false;

int ticks = 0;

void setup() {
  Serial.begin(9600);
  pinMode(sensorPin, INPUT);
  pinMode(relayPin, OUTPUT);
  digitalWrite(relayPin, LOW);
}
void loop() {

  long distance = pulseIn(sensorPin, HIGH) / 147;
  Serial.println(distance);

  if (distance < threshold && distance != 0) {

    ticks++;

    if (ticks > 2) {

      ticks = 0;

      if (DEBUG) {
        Serial.println("Trigger");
        Serial.println(distance);
        Serial.println("--------------------------");
      } else {
        digitalWrite(relayPin, HIGH);
        Keyboard.write(49);
      }

      delay(10 * 1000);
    }
  }
  else {
    digitalWrite(relayPin, LOW);
  }
}