This is great! Thank you for looking in to this! I actually commented back in August on that first link you sent. The weird thing was that the inverter never worked for me. It worked fine for the GPS I was using, but then started messing everything up once I plugged in the transducer. I also had to plug everything in the exact order I described, or else it also wouldn’t work. It was super super super finicky, and only worked one out of maybe 5 times I power cycled it. Below is the comment if it helps with the pixhawk?
I have a DT800, the RS485 converter that was linked, and an arduino Uno. I hooked up everything to a GPS I have and a serial line was being printed no problem, then trying to hook up to the transducer, and nada. A combination of pulling cables here and inserting cables there, I got lines to finally display, here is what I had to do.
A <=> NMEA+
B <=> NMEA- AND my TX pin of the arduino!
VCC <=> 5V
gnd <=> ground
RO <=> RX pin of arduino
RE <=> Grnd of arduino
Now this initially didn’t work, UNTIL, I unplugged the ground from the ground terminal on the RS485 leaving the RE ground connected. Then serial lines started displaying
I have to plug them in and unplug them in the right order, or else I don’t get anything. If I just hook up the RX and TX to NMEA+ and - respectively, I only get MTW and DBT, but not DPT…No idea why. So confused. Maybe there is a capacitor on there that needs to be charged up, then the ground needs to be taken away?
I will be busy house sitting this week, but if I can find some time before you get your transducer in the mail, I will let you know! Cheers!