• @Gordon Thank you for showing me the right direction!
    Success! FW for NRF52832DK has been build and is working on the serial line.... Some values has to be changed in directory BOARDS, file NRF52832DK.py... see below ... Time to go to bed now.

    info = {
    .
    .
     'default_console_tx' : "D29",
     'default_console_rx' : "D30",
    .
    .
    };
    
    devices = {
    .
    .
      'RX_PIN_NUMBER' : { 'pin' : 'D30'},
      'TX_PIN_NUMBER' : { 'pin' : 'D29'},
      'CTS_PIN_NUMBER' : { 'pin' : 'D28'},
      'RTS_PIN_NUMBER' : { 'pin' : 'D2'},
    };
    
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