Long overdue status update after I've finally had a few evenings to work on the driver. Biggest new thing is that ethernet connection now works for me at least. Set connection mode to Ethernet / TCP and fill in the host name and username/password (port number isn't actually used, but doesn't hurt either) before connecting.

Quite a lot of small and larger fixes included too, namely I found from the Windows driver source that digital input and buttons are actually inverted in the status reply, so that caused shutter open/close status confusion among other things. I also added option to set home sensor polarity as it seems to be active low for Arduino cards where as USB Card 2.1 uses active high. So if find home command finds the sensor almost immediately without actually being near the sensor, that is most probably caused by wrong polarity setting.

Hopefully someone has time to test this and report if/when things don't work

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