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I'm trying to connect my DST800 Triducer (NMEA 0183) to OP V2 using a USB to RS422 adapter. Despite correct wiring and OP recognizing it at 38400 Baud, OPEN CPN defaults to 4800 baud, and I'm not getting responses for temperature, depth, or speed. Testing in my office on RPI V3b+. Any help appreciated.
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Usual way is for signalk to connect to all the data sources then opencpn connects to signalk with a tcp connection on 10.10.10.1 port 10110
Did you use the openplotter serial app to connect to the DST? That sets up the signalk connection so if all is well you should see the data in the signalk data browser.
It won't go well if both signalk and opencpn are trying to talk to the DST at the same time.