Have you ever wondered about chatting with your appliances over a messaging app? Sounds weird, right. But today we are going to do a thing similar to that. Don't worry you don't need to buy mobile phones for your appliances. All you need is the Telegram mobile app, any microcontroller like Arduino UNO or ESP8266/32, and your appliances.
We will demonstrate the method by controlling 8 LEDs through Telegram App by just sending simple ON/OFF messages and after the completion of the task, we will also get a reply from our microcontroller about that. Apart from LEDs, you can control other appliances by making suitable changes in the code and circuit. It is going to be fun so let's jump straight into it.
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About Telegram App
Telegram is a cloud-based instant messaging, videotelephony, and voice over IP service. Telegram client apps are available for Android, iOS, Windows Phone, Windows, macOS, and GNU/Linux and originated in Russia. Users can send messages and exchange photos, videos, stickers, audio, and files of any type.
Telegram's client-side code is free software, whereas its server-side code is closed-source and proprietary. The service also provides APIs to independent developers. As of April 2020, Telegram had 400 million monthly active users.
The default messages and media use client-server encryption during transit. This data is also encrypted at rest but can be accessed by Telegram developers, who hold the encryption keys. In addition, Telegram provides end-to-end encrypted calls and optional end-to-end encrypted "secret" chats between two online users on smartphone clients. However, the desktop clients (excluding macOS clients) do not feature end-to-end encryption, nor is end-to-end encryption available for groups, supergroups, or channels. Telegram has defended the lack of ubiquitous end-to-end encryption by claiming the online-backups that do not use client-side encryption are "the most secure solution" currently possible, despite several other chat services such as Signal, Matrix, and WhatsApp offering end-to-end encryption on all platforms.