IOT How to flash MicroPython firmware onto an ESP8266 ESP-12E chip using esptool? By default, ESP8226 module comes with AT Firmware. In this post, we'll see how to flash MicroPython firmware onto an ESP8266 ESP-12E chip using esptool. Tools,Technologies and Components used Abhijit Ghosh 4 Feb 2017 ยท 6 min read