Spark.publish() + PIR motion sensor

motion.cpp

/*
 * Connected sensor
 * Spark.publish() + PIR motion sensor = awesome
 * Thanks to Adafruit for the reference and inspiration
 */

int inputPin = D0;              // choose the input pin (for PIR sensor)
int pirState = LOW;             // we start, assuming no motion detected
int val = 0;                    // variable for reading the pin status
int calibrateTime = 10000;      // wait for the thingy to calibrate

void setup() {
  pinMode(inputPin, INPUT);     // declare sensor as input
  Serial.begin(9600);
}

void loop(){
  if (calibrated()) {
    readTheSensor();
    reportTheData();
  }
}

bool calibrated() {
  return millis() - calibrateTime > 0;
}

void readTheSensor() {
  val = digitalRead(inputPin);
}

void reportTheData() {
  if (val == HIGH) {
    if (pirState == LOW) {
      // we have just turned on
      Serial.println("Motion detected!");
      Spark.publish("spark-hq/motion");
      // We only want to print on the output change, not state
      pirState = HIGH;
    }
  } else {
    if (pirState == HIGH) {
      // we have just turned off
      Serial.println("Motion ended!");
      // We only want to print on the output change, not state
      pirState = LOW;
    }
  }
}