Do I need to connect all three servo wires for each of the two channels, i.e., pitch and roll? I tried it and it seemed to work except that the FC also sends in 5 VDC to the BGC. Then I tried it again with the red power leads connected and I no longer get real time data appearing live in the real time data tab under Basic Settings.
If you have a common ground in your system, that is powering all from one battery, you only need to connect one wire from FC to the gimbal board, the signal one.
Thanks all.... power lead removed so that BGC does not have input power from multiple sources. All is working now. But I want to make use of RC Rx channel 5 to drive the BGC "cmd" so that I can changes profiles while in flight. But the aux inputs have no dedicated ground return. Do I connect the RC Rx return wire to another BGC ground point?