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Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
Mr.Peu
I'm not sure. I didn't have any trouble with the software (on Linux), it just flashed when I used the esptool command. Hardware-wise was fiddly, you need to connect up 6 of the pins on the ESP8266, and I needed a voltage regulator to supply the 3.3v because the USB-TTL couldn't supply enough current for the ESP8266. It's still not too hard if you've got all the parts and you know where everything goes. Might be hard to hook up if you've got the shim soldered on.