Once OpenCPN is running on the Raspberry Pi, configure it for the dAISy HAT. Go to the Options dialog,
select the Connections icon and add a new connection. Set Properties to Serial. Enter or select the
Dataport under which dAISy presents itself (see chapters above to determine the correct port). Set
Baudrate to 38400. Leave everything else as preset by OpenCPN.
Configuration of a serial connection for dAISy in OpenCPN