I am trying to connect to the PlaneWave EFA (focuser) unit, which connects via a byzantine USB-to-serial connection using a product called "DIGITUS USB 2.0 serial adapter," which PlaneWave supplied.

The connection itself seems to be working based on output from "lsusb" and "dmesg" as well as the kstars log reporting a successful connection to the port.

The handshake, however, fails. What INDI sends to the EFA for the Handshake (getting the Version) appears to me to match what the protocol requires as documented here:
     www.planewave.eu/fileadmin/Daten/produkt...cation_protocols.pdf

I set the baud rate to 19200 as the above document suggests.

I am running under Ubuntu 21.04 on a NUC. The Digitus product says it works with Linux.

I am at a loss to know how to proceed. Has anyone out there had success? Any suggestions for things to try?

The attached files have what I think are all the relevant lines from the KStars log, lsusb and dmesg.
 

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