Finally got sbus and telemetry working with F3 Controller and X4RSB receiver. Wanted to share working setup. Will add more info and pics when I get time. The youtube videos 'mainly from Painless360' got me 95% done. Could not get telemetry to transmit to Taranis Transmitter. Finally fixed with signal diode. The following is from my notes.
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X4RSB has SBus connected to Pin 3 of IO_2 connector which is also the UART3 RX pin. This works. Now I cannot use the other UART3 header for telemetery according to Seriously Pro F3 manual. Painless360 video shows UART2 Pin 3 being used but he sacraficed his gps to do it. He also mentions you can use IO_2 pin 6= ch8/Sonar Echo as a TX for smartport telemetry.
In clean flight enable softserial then in ports softserial2 Telemetry Tab, set to smartport, auto. The 5V IO to 3.3V TTL did not seem to matter. X4RSB is Tolerant! This did not work at first.
FIX: Same as on my Naze32. You need a signal diode'I used 1N4148' dark band connected to IO_2 pin 5 Ch7/Sonar Trigger as RX, non-band side of diode connected to IO_2 Pin6 TX. Make sure the smart port wire is connected to IO_2 pin 5 RX only. This worked Now I have telemetry on Taranis. Cleanflight CLI telemetery_inversion = on. I think I had to rescan for sensors on the Taranis transmitter after soldering in diode.
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/*
X4RSB has SBus connected to Pin 3 of IO_2 connector which is also the UART3 RX pin. This works. Now I cannot use the other UART3 header for telemetery according to Seriously Pro F3 manual. Painless360 video shows UART2 Pin 3 being used but he sacraficed his gps to do it. He also mentions you can use IO_2 pin 6= ch8/Sonar Echo as a TX for smartport telemetry.
In clean flight enable softserial then in ports softserial2 Telemetry Tab, set to smartport, auto. The 5V IO to 3.3V TTL did not seem to matter. X4RSB is Tolerant! This did not work at first.
FIX: Same as on my Naze32. You need a signal diode'I used 1N4148' dark band connected to IO_2 pin 5 Ch7/Sonar Trigger as RX, non-band side of diode connected to IO_2 Pin6 TX. Make sure the smart port wire is connected to IO_2 pin 5 RX only. This worked Now I have telemetry on Taranis. Cleanflight CLI telemetery_inversion = on. I think I had to rescan for sensors on the Taranis transmitter after soldering in diode.
*/