Arduino is a great hardware for a lot of reason: easy to use, difficulto to break, it is a very solid 5-Volt board.

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After months of esp8266 experimentation, I “just” discovered this little chip has also a I2S Audio digital interface. To discover it you must install the Arduino IDE adapter and code directly in C++ (brr, ok not a breeze but not boring like Java :)

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UPDATED and BUGFIXED!

MicroPython Repl command line is very nice, because you can telnet to the chip and read-and-evaluate python code. It is a great way of learning embedded IoT. The bad thing you cannot copy file while it is running, so experimenting get bad.

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Esp8266 is the super cheap chip which can run Micropython. You can buy it on Amazon for as little as €8 or less, and as little as $5 or less on Bangood/AliExpress.

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From: ESP32/ESP8266 Wi-Fi Attacks | Hacker News

This repository demonstrates 3 Wi-Fi attacks against the popular ESP32/8266 IoT devices:

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