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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.
@dapgo
I just edited my question, as it was not well focused.
The identification is internal, and i supposed that all bangle or puck devices have some digits of MAC in common. But maybe there are other hw data that can be used to identify the device model.