/* * PIRMotionSensor.ino * Example sketch for the PIR motion sensor * * Copyright (c) 2013 seeed technology inc. * Website : www.seeed.cc * Author : FrankieChu * Create Time: Jan 21,2013 * Change Log : * * The MIT License (MIT) * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ /*****************************************************************************/
// Function: If the sensor detects the moving people in it's detecting range,
// the Grove - LED is turned on.Otherwise, the LED is turned off.
// Hardware: Grove - PIR Motion Sensor, Grove - LED
// Arduino IDE: Arduino- 1.0
/*******************************************************************************/
/*macro definitions of PIR motion sensor pin and LED pin*/
//Use pin 4 to receive the signal from the motionsensor module
#define PIR_MOTION_SENSOR 4
//the Grove - LED is connected to D7 of Arduino
#define LED 7
void setup(){ pinsInit();
}
void loop() {
if(isPeopleDetected())
//if it detects the moving people?
turnOnLED();
else turnOffLED();
}
void pinsInit(){
pinMode(PIR_MOTION_SENSOR, INPUT);
pinMode(LED,OUTPUT);
}
void turnOnLED(){
digitalWrite(LED,HIGH);
}
void turnOffLED(){
digitalWrite(LED,LOW);
}
/***************************************************************/
/*Function: Detect whether anyone moves in it's detecting range*/
/*Return:-boolean, ture is someone detected.*/
boolean isPeopleDetected(){
int sensorValue = digitalRead(PIR_MOTION_SENSOR);
//if the sensor value is HIGH?
if(sensorValue == HIGH) {
return true;//yes,return ture
}
else {
return false;//no,return false
}
}
