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  • Hi - I haven't got any measured figures, but:

    The connection interval can be negotiated (depending on the PC) between 7.5 and 20ms - and it can send/receive 20 bytes per interval, so that's between 1000-2700 bytes/second. For reliable comms I'd stick a little below that if possible.

    On Espruino's side, newer firmwares will warn you with a FIFO_FULL error message if they believe that they have lost some data (eg. code was busy waiting for a write to complete so didn't have time to process the data that came in)


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