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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.
@AkosLukacs
The Bangle is a DT NO1 F18 watch reflashed, not custom hardware, so Gordon doesn't have the PCB files, but there is a lot of info in a recent thread. You can find some more info in the forum and the docs.
The source code is up at Github, main firmware with build instructions is at https://github.com/espruino/Espruino but check the other repos there as well. Everything is there Bangle apps, docs, PCB files for other Espruinos...
Personally I would love if long range BLE would work with Espruino. Not for a Bangle, but for home automation. Did some testing with Nordic's demo and has a pretty impressive range for 2.4GHz and PCB antenna. Tried to port to Espruino, but not enough time & skill yet. Even "just" advertising and scanning would be useful for tiny sensor nodes.