FS-x6b not communicating with F4 V3s Plus

F4 V3s Plus does not have IBUS port. Tried ti use, as advised a free UART. Inmy case RX 6 and set:


serialrx_inverted =OFF

I did set the receiver to IBUS as well as on my FS-i6 RC.

That did not solve the problem.

I tried another approach.

Connecting the data wire to PPS as in the manufacture's instructions. 

Changed the setting in Betaflight and the FS-i6 to PPM

tried both



OFF and ON

Stll the FC does not communicate with the receiver.


Any ideas? this is very frustrating.

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