Details of the F4 AIO FC 12A V1
DIAGRAM FOR F4 2-4S AIO FC
HOW TO CONNECT THE EXTERNAL RX TO THE FC
Here is the connection diagram with Frsky XM+ receiver.
Here is the connection diagram with FS-RX2A receiver.
Here is the connection diagram with Futabe-X-BOSS AC900 receiver.
Here is the connection diagram with TBS Crossfire receiver.
Here is the connection diagram with DSMX FullSpeed receiver.