Hello there, has anyone succesfully connected a FrSky Fport to a Matek F411 wse board?

i have spent all they trying out all the different configs and i could not get any receiver inputs to INAV at all,

heres the setup

R9MX FCC version (changed Fport out to from transmitter (Radiomaster tx16s))

Fport wire connected to TX2 pad, 

Ports - serial rx on  uart 2

serial based receiver 

Fport 

Tried with both inverted and duplex on and off

sbus works normaly,

i want to be able to connect the receiver with telemetry with only 3 wires as it is perfect for the zohd talon gt, only having 3 wire spare on the wing connector, 

did anyone ran into this problem at all?