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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.
@23Ro
After investigating further, I have narrowed it down to the auto-reconnect.
Everytime I'm out of bluetooth reach, it won't connect again unless:
On first try, it sometimes throws the error that the Bluetooth PIN could not be validated.
It is very likely that btn1+btn2 vs. turning on/off was just my perception and a coincident.
Once a stable connection has been established, without master/slave dropping or loosing it, it continues to work like a charm.