Control MAX7219 Dot Matrix LED Display With Telegram Using ESP8266

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LED dot matrix displays are a great way to add visual interest to your projects. In this tutorial, we'll be using an ESP8266 to control a MAX7219 LED dot matrix. We'll be using the Telegram messaging app to send commands to the ESP8266 to turn the various segments of the dot matrix on and off. This is an excellent project for anyone who wants to get started with controlling hardware with the Telegram app.

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but is this secure? and can I use it while i'm not connected to the wifi?

Michele-kzbo