TelegramDoorEvents

With this project you will receive a notification on your phone as soon as your frontdoor is being locked or unlocked. The other way around you can type a command in your phone, after which you will receive an answer with the current status of your frontdoor (locked or unlocked). The project also includes a red and green LED which show the current status of your frontdoor so you can see if it's locked or not just by looking at it. You can also choose to turn off the LEDs or notifications by phone.

The architecture in short: the project is built around an ESP8266, a magnet and reedcontact in your frontdoor and a Telegram bot on your phone.

Demonstration

Here is an example of the input/output in your Telegram Bot, where you see some notifications of events which occured and some commands and answers. My bot is called Frontdoor. You can name it any name you like.

Parts

• ESP8266 (I used a clone NodeMCU)
• Magnet
• Reedcontact
• some electro components
• Phone

Software

• Arduino IDE
• Additional Board Manager URL in your Arduino preferences: http://arduino.esp8266.com/stable/package_esp8266com_index.json. (I used ESP8266 Boards 2.7.1)
• ArduinoJson 5.13.5 from Benoît Blanchon
• UniversalTelegramBot 1.1.0 from Brian Lough
• This project software
• Telegram app on your phone

Closeups

My ESP8266 on a board with other components:

The reedcontact in the closing bowl:

The magnet glued onto the deadbolt:

Software details

As for the WiFi connection. Enter your router's credentials on the place of the ***.

Hereby a disclaimer for the (in)secure connection! In my project I used this code:

client.setInsecure();

This line makes it possible to get a HTTPS-connection without having to flash a new certificate or fingerprint to the ESP every time it changes. I know it's not adviceable but it's sooooo easy and for the simple purpose of this project I'm not too worried things will go wrong.

As for Telegram: you will need to install the Telegram app on your phone. Once you've done that, create a bot. That's fairly easy to do. When you have created the bot you will need the bot token and the chat id. The BotFather knows it all. You will need to enter both credentials in the project's code on the place of the ***.

As for the project code: I grabbed lines of code from all over the web. So definately not all code is mine!