The Tech Lab
Published

Motion Detecting IoT Device

A simple motion detecting device that uses IFTTT to send a notification to user when it detects a motion.

IntermediateFull instructions provided519
Motion Detecting IoT Device

Things used in this project

Hardware components

Wemos D1 Mini
Espressif Wemos D1 Mini
×1
PIR Motion Sensor (generic)
PIR Motion Sensor (generic)
×1
Rechargeable Battery, 3.7 V
Rechargeable Battery, 3.7 V
×1
TP4056 Battery Charger
×1
Breadboard (generic)
Breadboard (generic)
Or solderable veroboards for a more permanent device
×1
Jumper wires (generic)
Jumper wires (generic)
×1

Software apps and online services

Arduino IDE
Arduino IDE
Maker service
IFTTT Maker service

Hand tools and fabrication machines

Soldering iron (generic)
Soldering iron (generic)

Story

Read more

Schematics

wemos_bb_HXxbghhWLg.png

Code

Untitled file

Arduino
/*
  Motion Trigger
*/

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

// Type your WiFi name (SSID) and password here:
const char* ssid = "your_ssid_here";
const char* password = "your_password_here";

const int httpsPort = 443;
const char* host = "maker.ifttt.com";

// Replace with your eventname and api key - open the documentation: https://ifttt.com/maker_webhooks
String event_name = "motion_triggered";
String api_key = "your_api_key_here";
String url = "/trigger/" + event_name + "/with/key/" + api_key;

// Main setup - this part of the code runs only once on startup
void setup() {
  // Begin serial connection, mostly for debugging
  Serial.begin(9600);
  // Initialize the on-board LED
  pinMode(LED_BUILTIN, OUTPUT);
  digitalWrite(LED_BUILTIN, HIGH);  // turn off the LED (HIGH is OFF for the on board LED)

  // Initialize WiFi and print on serial monitor (for debugging)
  WiFi.begin(ssid, password);
  Serial.println("Connecting");
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  Serial.println("");
  Serial.print("Connected to WiFi network with IP Address: ");
  Serial.println(WiFi.localIP());

  makeHTTPRequest();
  // Sleep until a PIR motion is detected
  ESP.deepSleep(0);
}

void loop() {

}
void makeHTTPRequest() {
  //Send an HTTP POST request when PIR is triggered
  if (WiFi.status() == WL_CONNECTED) {      // check if WiFi is connected
    digitalWrite(LED_BUILTIN, LOW);         //turn on the LED
    Serial.println("");
    Serial.println("WiFi connected");
    Serial.println("IP address: ");
    Serial.println(WiFi.localIP());

    WiFiClientSecure client;    // create a new HTTP client
    Serial.print("connecting to ");
    Serial.println(host);

    if (!client.connect(host, httpsPort)) {   //connect to HTTP client, show error if failed to connect.
      Serial.println("Error: Connection failed.");
      return;
    }

    Serial.print("requesting URL: ");
    Serial.println(url);

    client.print(String("GET ") + url + " HTTP/1.1\r\n" +             // request to HTTP client, in order to trigger IFTTT webhooks service.
                 "Host: " + host + "\r\n" +
                 "User-Agent: BuildFailureDetectorESP32\r\n" +
                 "Connection: close\r\n\r\n");

    Serial.println("request sent");

    // get the reply from HTTP and print on serial monitor
    while (client.connected()) {
      String line = client.readStringUntil('\n');
      if (line == "\r") {
        Serial.println("headers received");
        break;
      }
    }

    String line = client.readStringUntil('\n');

    Serial.println("reply was:");
    Serial.println("==========");
    Serial.println(line);
    Serial.println("==========");
    Serial.println("closing connection");
    Serial.println("");

    delay(10000);   // long delay to avoid too many triggers at once

    digitalWrite(LED_BUILTIN, HIGH);   //turn the LED off as there's no more motion
  } else {
    // If the device fails to connect to WiFi, print an error
    Serial.println("Error: WiFi not connected.");
  }
}

Credits

The Tech Lab

The Tech Lab

1 project • 8 followers
The Tech Lab endeavors to create a whole new generation of tech innovators and developers in Bangladesh and ultimately, in the world.
Thanks to Adittya Saha, Nourin Siddique Anannna, and Iqbal Samin Prithul.

Comments

Related channels and tags
  • Espressif
  • Home Automation
  • Home Automation
  • IFTTT
  • Security
  • Security