Trying to connect a motion sensor to the spark

General
1

I need to buy a motion sensor to control LEDs and i duno which sensor would be compatible with the spark
these are my list of options I’d appreciate it if some one share their opinion
http://www.active123.com/SESEN116A2B-PIR-Motion-sensor-module-Prodview.html


http://www.jameco.com/webapp/wcs/stores/servlet/Product_10001_10001_2082927_-1#

Thank you

2

I’m not sure if there’s a big operational difference between those. Personally, I just bought the cheapest I could find on aliexpress, was like $10 for 10 of them… They seem to work just fine. eBay has a bunch of those things as well.

3

so any of them will work on the spark with no problem ?!

4

If you look at the description, you’ll notice that all they do is switch a logical state. They go from HIGH -> LOW or LOW -> HIGH upon detected motion. You can easily check for this using digitalRead, or by using an interrupt. So yeah, you should be good with any of those. Like I said, Ebay has quite a few of them as well, for a much lower price. Worthwhile checking out, if you don’t mind the increased delivery time.

5

Yeah, like @Moors7 said, you can just buy a bunch of them cheap on eBay, and they should work fine. That’s what I did. You can get them much cheaper than those that you linked to. And yes, I’ve actually tried one with a Spark, and it worked fine.

Here’s some sample code:

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

int inputPin = D3;              // choose the input pin (for PIR sensor)
int pirState = LOW;             // we start, assuming no motion detected
int val = LOW;                  // 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("my-motion");
      // We only want to print on the output change, not state
      pirState = HIGH;
    }
  } else {
    if (pirState == HIGH) {
      // we have just turned of
      Serial.println("Motion ended!");
      // We only want to print on the output change, not state
      pirState = LOW;
    }
  }
}

The PIR should have a couple of pots that you can adjust with a small screwdriver to change the motion sensitivity and the delay after a trigger before the PIR will allow a new state change.