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IoT Motion Sensor – ESP8266 01 + PIR

Najad
esp pir iot motion sensor

IoT Motion Sensor

In this project, we are going to learn how to make an Internet of things motion sensor which will give us alert on our phone when motion is detected at the place we installed the sensor. Everything works through the internet so there is no limitation of the distance between the sensor and the phone.

Video

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Hardware Used

ComponentsAliExpressAmazon.inAmazon.comBanggoodUtsource
ESP8266 01
PIR Motion sensor
ESP8266 serial adaptor

Working Theory

Pin Out Diagrams

Circuit

IFTTT Applet Creation

Step 1:

  • Click on your profile icon
  • Then select the create option from the drop-down list.

Step 2:

  • Now click on the +This button

Step 3:

  • Now search for webhooks
  • Then click on the Webhooks icon

Step 4:

  • From choose trigger option, click on the “receive a web request”.

Step 5:

  • Now give a name for the even
  • I have written “iot_Motion_Sensor”.
  • Note that there should not be any blank space between the words.

Step 6:

  • Now clock on +That button

Step 7:

  • Now from “choose action service”,
  • Search for notification.
  • And click on the notification icon.
  • Note that you must be installed and logged in the IFTTT app on your phone for the notifications to work.

Step 8:

  • Now from here choose any of the options you need
  • I am going to choose simple notification instead of rich notification.

Step 9:

  • Now in the message box write the notification which you needed to receive when the motion is detected.
  • I am simply going to write “Motion Detected”
  • If you have multiple sensors in place then you can write something like motion detected at garage or motion detected in closet etc..
  • If you want you can give the time when the motion is detected.

Step 10:

  • Now click finish

Step 11:

  • That’s it now we have created the applet successfully.

Obtaining the HTTP GET request URL

Step 1:

  • Log in to your IFTTT account.
  • Click on your profile pic and choose My services

Step 2:

  • Then select webhooks.

Step 3:

  • Now click on Documentation

Step 4:

  • Now replace {event} with our event name which we were given when we created our applet.
  • In my case it was “Iot_Motion_Sensor”.
  • There is a test button you can click on it to check whether your applet is working.
  • Your secret key also will be on this page which you should not share with anyone.
  • Don’t worry I have changed mine 😉
  • You can click on the image to zoom.

Uploading and testing

Code

// IoT motion sensor by www.diyusthad.com
// www.youtube.com/c/diyusthad
// www.hackser.io/najad

#include <ESP8266WiFi.h>
#include <ESP8266HTTPClient.h>

const char* ssid = "*****"; //Your WiFI ssid
const char* password = "*****"; //Your WiFi password
boolean PIRstate ; //variable to store PIR state
boolean lastPIRstate = HIGH;
int PIR = 0; //PIR connected to GPIO 0

WiFiClient wifiClient;

void setup () {

  WiFi.begin(ssid, password);

  while (WiFi.status() != WL_CONNECTED)
  {
    delay(1000);
  }

  pinMode(PIR, INPUT); //digitalWrite(PIR, LOW);

  pinMode(LED_BUILTIN, OUTPUT);

  delay(30000);

}

void loop()
{

  PIRstate = digitalRead(PIR);  //HIGH when motion detected, else LOW

  if (PIRstate != lastPIRstate)  //Checking if there is any motion
  {

    digitalWrite(LED_BUILTIN, LOW);
    delay(100);
    digitalWrite(LED_BUILTIN, HIGH);
    if (WiFi.status() == WL_CONNECTED)  //Check WiFi connection status
    {
      HTTPClient http;  //Declare an object of class HTTPClient

      http.begin(wifiClient,"paste the link from ifttt");  //Specify request destination
      http.GET();   //Send the request
      http.end();   //Close connection

    }
    lastPIRstate = PIRstate;
  }

}

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