Check out this post and the whole thread on esc telemetry. This user has the nanov6. He says he had to comment out Uart4 and re-compile AP but i don’t think that may be needed anymore. The post was a month or so ago. I haven’t check in on this theory yet about i am pretty sure i saw it setup properly on the new v6 regular target. so they may have updated the hwdef for the nano as well as they are very similar. Also @Paul_Atkin1 confirmed a few posts down that he had it hooked up correctly but didn’t think he did the whole time. Due to the messages he saw in MP. … It might work if your on the master or new 3.6.1RC for the nanov6