Hi - My 3DR in my drone keeps loading up in "firmware update mode" - (Solid Red LED).What am I doing wrong? Simple Fix?To get it to work, I have to connect it to flight planner and USB cable, and connect to it. Then update it, then plug it back in…

Hi - I have the new APM 2.5 board and would love to know where to plug the sonar and the current sensor.I have the EZL0 and the Attopilot 180amp sensor.Thanks in advance.