Datasheet

6
/*
Grove-PIR-Motion-Sensor
The following sketch demonstrates a simple application of sensing motion.
When someone moves in its detecting range, it will output High through its
SIG pin and the LED will light. Otherwise, it will output LOW. Then you can
use it to detect the motion of people.
The circuit:
* sig pin of the Grove-PIR-Motion-Sensor to pin39 (J14 plug on Grove Base BoosterPack)
* one side pin (either one) to ground
* the other side pin to +VCC
* LED anode (long leg) attached to RED_LED
* LED cathode (short leg) attached to ground
* Note: Position the trig jumper on N_Retrig to ensure
This example code is in the public domain.
http://www.seeedstudio.com/wiki/index.php?title=Twig_-_PIR_Motion_Sensor
*/
/* Macro Define */
#define PIR_MOTION_SENSOR 39 /* sig pin of the PIR sensor */
#define LED RED_LED /* led */
#define ON HIGH /* led on */
#define OFF LOW /* led off */
#define _handle_led(x) digitalWrite(LED, x) /* handle led */
/* the setup() method runs once, when the sketch starts */