all of a sudden I am getting error message prearm RC not calibrated. I have no idea what I did to make this happen. any suggestions on how to fix? thanks.
You should disable the arming checks on ArduSub 3.4. Click the gears icon, go to the Safety tab, and under arming checks, make sure that none of the items are selected.
We are preparing instructions to update your software to ArduSub 3.5, which has implemented arming checks. Keep your eye on the forum for that post.