Arduino Door Sensor: Real‑Time Facebook Messenger Alerts via IFTTT

Apps and online services

IFTTT Maker service

About this project

Notice: IFTTT recently discontinued their FB Messenger service because of new policies made by Facebook. Therefore, this project is no longer feasible.

If you are a beginner, you can learn the related topic:

• Arduino - Wifi
• Arduino - Door Sensor.
• Arduino - IFTTT

Demonstration

I made the similar project, but cheaper cost (in total) and can be used for industrial environment here: https://www.hackster.io/phpoc_man/phpoc-monitoring-door-open-via-facebook-messenger-49603e

System Architecture

Wiring

• One pin to GND.
• Another pin to A0.

How to Create IFTTT Applet

Follow 12 steps (see red square)

1. Create Applet.

2. Set trigger.

3. Search "Webhooks" and click Webhooks.

4. Choose "Receive a web request."

5. set Event Name is "door_open" and click "Create trigger" button.

6. Click "+that" button to create the action.

7. Search "Facebook Messenger" and click.

8. Choose Action "Send message". It needs to connect to Facebook for the first time.

9. Create the content of message and then click "Add ingredient" button.

10. Choose "OccurredAt". This is time of door open.

11. Click "Create action" button.

12. Click "Finish" button

Now Applet is created.

Get Webhooks Key

Go to this link https://ifttt.com/maker_webhooks

Click "Documentation" to see the Webhooks Key.

Copy the Webhook Key and put it in Arduino code.

Library

The below code uses two library: PHPoC and Button libraries

The Best Arduino Starter Kit for Beginner

If you are looking for an Arduino kit, see The Best Arduino Kit for Beginners

Function References

• Serial.begin()
• Serial.println()
• delay()
• millis() ​​​​​​​
• for loop
• while loop
• if else
• loop()
• setup()
• String.toInt()
• String.substring()
• String.indexOf()
• String.remove()
• String.equals()

Code

• MonotorDoorMessenger

MonotorDoorMessengerArduino

// Tutorial for the example is available here:
// https://forum.phpoc.com/articles/tutorials/1241-arduino-ssl-web-client

#include <Phpoc.h>
#include <ezButton.h>

String IFTTT_WEBHOOKS_KEY = "xxxxxxxxxxxxxxxxxxxxxx"; // change your webhooks key here
char server_name[] = "maker.ifttt.com";

PhpocClient client;
ezButton button(A0);  // create Button object that attach to pin A0;

void sendNotification()
{
	// connect to web server on port 443:
	if(client.connectSSL(server_name, 443)) {
		// if connected:
		Serial.println("Connected to server");

		// make a HTTP request:
		client.println("GET /trigger/door_open/with/key/" + IFTTT_WEBHOOKS_KEY + " HTTP/1.1");
		client.println("Host: maker.ifttt.com");
		client.println("Connection: close");
		client.println();
	}

	while(client.connected()) {
		if(client.available()) {
			char c = client.read();
			Serial.write(c);
		}
	}

	Serial.println();
	Serial.println("disconnecting from server.");
	client.stop();
}

void setup() {
	Serial.begin(9600);

	// initialize PHPoC [WiFi] Shield:
	Phpoc.begin(PF_LOG_SPI | PF_LOG_NET);

	button.setDebounceTime(100); // set debounce time to 100 milliseconds
}

void loop() {
	button.loop(); // MUST call the loop() function first

	if(button.isPressed()) { // if door is opened...
		Serial.println("door is opened");
		sendNotification();
		delay(100);
	} else if (button.isReleased()) { // if door is closed...
		Serial.println("door is closed");
	}
}

Schematics