Published September 4, 2019 © GPL3+

IoT Motion Sensor – ESP 01 + PIR

Internet-connected motion sensor which will give us alert on our phone when motion is detected at the place we installed the sensor.

IntermediateFull instructions provided14,452

Things used in this project

Hardware components

UTSOURCE Electronic Parts

UTSOURCE ESP8266-01

UTSOURCE PIR Motion Sensor

SparkFun FTDI Basic Breakout - 3.3V

Software apps and online services

Arduino IDE

IFTTT Maker service

Story

Introduction

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 sensor and the phone.

Originally posted in https://diyusthad.com/2019/09/iot-motion-sensor-esp-01-pir.html

Video

Working Theory

We have connected the PIR motion sensor to one of the GPIO pins of the ESP 8266 – 01.
Whenever the PIR detects motion then the output sates of the PIR sensor will change which will be detected by our ESP 8266 – 01 controller.
We have programmed the ESP to make an HTTP GET request to our IFTTT webhooks applet.
Whenever the HTTP GET request has been made then it will trigger an notification alert on our mobile phone.

Pin Out Diagrams

Circuit

Connect the GND of ESP 01 and PIR sensor to the negative of the power supply
Connect the 3.3v of the power supply to the VCC of both ESP 01 and PIR sensor
Connect the OUT of PIR sensor to the GPIO 2 pin of ESP

IFTTT Applet Creation

Before creating Applet in IFTTT you need to create an account in the IFTTT web site. www.ifttt.com
Also, download the IFTTT app for your Android or iPhone.
Download the Android app from here.
Download the iPhone app from here.
After downloading the app login with your user credentials.
Also, allow all the permissions which ask for.

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 having any 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 me installed and logged in the IFTTT app in your phone for the notifications to work.

Step 8:

Now from here choose any of the option 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 time at when the motion is detected.

Step 10:

Now click finish

Step 11:

Thats it now we have created the applet successfully.

Getting the HTTP GET request URL

Step 1:

Login 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 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 in 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

Now upload the code to your ESP8266 – 01 using a FTDI or use a Arduino as a USB to TTL converter and upload the code.
Then connect the circuit and power it on.
Wait for 30 seconds to calibrate the PIR sensor, when calibration is done the onboard LED will turn OFF.
Now when ever a motion is detected the onboard LED will blink and
A push notification will arrive in your phone saying “Motion Detected”.

Code

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

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

    }
    lastPIRstate = PIRstate;
  }

}

Credits

Najad

30 projects • 96 followers

Just crazy stuff

IoT Motion Sensor – ESP 01 + PIR

Things used in this project

Hardware components

Software apps and online services

Story

Introduction

Video

Working Theory

Pin Out Diagrams

Circuit

IFTTT Applet Creation

Step 1:

Step 2:

Step 3:

Step 4:

Step 5:

Step 6:

Step 7:

Step 8:

Step 9:

Step 10:

Step 11:

Getting the HTTP GET request URL

Step 1:

Step 2:

Step 3:

Step 4:

Uploading and testing

Schematics

Circuit

Code

Code

Credits

Najad

Comments

Embed the widget on your own site

IoT Motion Sensor – ESP 01 + PIR

IoT Motion Sensor – ESP 01 + PIR

Things used in this project

Hardware components

Software apps and online services

Story

Introduction

Video

Working Theory

Pin Out Diagrams

Circuit

IFTTT Applet Creation

Step 1:

Step 2:

Step 3:

Step 4:

Step 5:

Step 6:

Step 7:

Step 8:

Step 9:

Step 10:

Step 11:

Getting the HTTP GET request URL

Step 1:

Step 2:

Step 3:

Step 4:

Uploading and testing

Schematics

Circuit

Code

Code

Credits

Najad

Comments

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