@rmackay9 i think by now there is quite a confusion about different topics all talking more or less about the same: connecting pixhawk/cube/whatever to a lowrance sonar. at least i have difficulties keeping track of the different threads and their discussions. i took the liberty to tag you here, because this thread solves all the others. (e.g. Lowrance NMEA 0183 to Cube Orange - #30 by RDodds )
i followed the guide from @aussiemaverick and can only say that it’s spot on. it works with my old elite ti version one (7 inch) which is known not to be very happy to take inputs, doesn’t support nmea2000 or ethernet. hence why i think that this guide works for just about any lowrance sonar.
the problem is solved thanks to his efforts. and he also found out that the wiki (Lowrance Elite Ti2 Sonar — Rover documentation) is wrong, which i definitely second.
i tried feeding my lowrance with gps data going by the wiki and couldn’t get it right. it turns out that the green and orange wire were mixed up.
is there a way we could update the wiki with his new description? also get rid of the title (“lowrance elite ti2.” since it also works for hds or elite ti1 etc.)
we’re able to have bidirectional depth and gps quite easy with just an rs422 connected to serial4/5.
only thing i’m not sure about: when i first hooked up everything right, my lowrance did not recognise the external gps. i did 2 things then: restart the pixhawk and activate depth output on lowrance. so it might be that it only works when lowrance also outputs NMEA DPT sentences.
please tell us if you want us to rewrite the wiki.
cheers