FETtec Mini AIO 15A, Руководство пользователя

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Connection Layout Bottom
The FETtec Mini AIO 15A has 3 UARTs in the following assignment
UART 1: Onboard FETtec OSD or others in case you use the bridge (for DJI Unit e.g.)
UART 2: RX
UART 3: VTX control (smart audio) + ESC telemetry
Note: A unit's transmit signal (TX) must match the corresponding receiver (RX) at the other end.
It must therefore be wired crosswise in order to transmit a signal