• Thanks for your reply. Now I can not do any experiments, I'm at work and I have my lab at home. I did not try described possibility, I was permanently connected to the USART... moreover I did not know about this dependence. In other words ...
    IF USART_connected THEN communicate_USART ELSE communicate_BLE
    ... Am I right?

    May I have more questions?
    a/ Where can I find the rules how to describe the particular card? ...BOARD.PY
    b/ FW for PUCKJS is in zip archive... what is in the file "espruino_1v91_puckjs.dat"?

    Thanks for the additional hints ... it will be long night today :-)


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