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Have your lights turn on right when you walk in your house!

BeginnerShowcase (no instructions)2 hours722

Things used in this project

Hardware components

Particle Photon

PIR Motion Sensor (generic)

Belkin WEMO Smart Outlet

Software apps and online services

ThingSpeak API

IFTTT

Story

Our project utilizes the Particle Photon and Belkin WeMo smart plug to give users the convenience of having their lights or any other electronic device turn on automatically when they enter their home or apartment. We decided on this project because neither of us have much experience with either IoT or programming, so we wanted to make something that is both simple and useful.

It works by having the PIR sensor hooked up to one Photon at the entrance of the home or apartment. If motion is detected, it publishes to the Particle cloud and then the other Photon tells the WeMo plugs to turn on through IFTTT. Simple, easy to set up, and can be applied to any electronic device with an analog switch i.e. a lamp, desk fan, game console, or whatever else you want!

Thingspeak graph of when the light triggers on: https://thingspeak.com/channels/256985

YouTube demonstration:

Code

/*                          +-----+
 *               +----------| USB |----------+
 *               |          +-----+       *  |
 *               | [ ] VIN           3V3 [*] |<-------Power To PIR Sensor
 *               | [ ] GND           RST [ ] |
 *               | [ ] TX           VBAT [ ] |
 *               | [ ] RX  [S]   [R] GND [*] |<-------Ground for PIR Sensor
 *               | [ ] WKP            D7 [ ] |       
 *               | [ ] DAC +-------+  D6 [ ] |       
 *               | [ ] A5  |   *   |  D5 [ ] |       
 *               | [ ] A4  |Photon |  D4 [ ] |     
 *               | [ ] A3  |       |  D3 [ ] |
 *               | [ ] A2  +-------+  D2 [ ] |
 *               | [ ] A1             D1 [ ] |
 *               | [ ] A0             D0 [*] |<-------Signal from PIR Sensor
 *               |                           |
 *                \    []         [______]  /
 *                 \_______________________/
 */
int PIR = D0;//sets PIR equal to pin D0
int led = D7;
void setup() {
    pinMode(PIR, INPUT);
    //sets pin D0 as an input
    pinMode(led, OUTPUT);
}

void loop() {
    int pirValState;

  pirValState = digitalRead(PIR);
  
    if (pirValState == LOW){
        digitalWrite(led, HIGH);
        Particle.publish("jcashwell15", "office-motion");
    delay(5000);
    //if the PIR pin reads a HIGH signal then it will trigger the publish command
    }
}

// This #include statement was automatically added by the Particle IDE.
#include <ThingSpeak.h>

void loop1() {
  // Get some data
  String data = String(10);
  // Trigger the integration
  Particle.publish("Light-On", data, PRIVATE);
  // Wait 60 seconds
  delay(60000);
}

void setup1() {
  // Subscribe to the integration response event
  Particle.subscribe("hook-response/Light-On", myHandler, MY_DEVICES);
}


void setup() {
Particle.subscribe("jcashwell15", myHandler);
}

void myHandler(const char *event, const char *data){
    //int num = (strcmp(data,"office-motion"));
   // delay(1000);
    if (strcmp(data,"office-motion")==0){
        Particle.publish("Light-On","jcashwell3");
    }
}