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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.
user110586
@user100421
The link below is for Flutter which you can use Android Studio for development.
https://blog.kuzzle.io/communicate-through-ble-using-flutter
my examples in youtube
https://www.youtube.com/watch?v=oLyJEf4LqIw&t=10s
https://www.youtube.com/watch?v=IdcHW38Pz9s