I'm trying to setup and wiring my Omnibus F4 Nano V6.1 but I cannot get SBUS working on Betaflight or iNav, I connected my receiver signal to SBUS (RX1) pin as described on manual and selected the UART1 port as serial RX and I set in configuration "serial based receiver" and "SBUS" below, but receiver still not working on Betaflight or iNav configurators. I tested my receiver (Walkera RX-SBUS) with another F4 board and it's working fine after binding it to my Jumper T-lite. Another issue: which UART (RX and TX pins) I'll have to connect the GPS/Mag combo in iNav assumed that SDA and SCL of mag must be connected to the relatives pins labelled SDA or RX3 and SCL or TX3 on manual?
After many trials it's very frustrating when u can't get receiver and GPS/mag working your board, any the any help would be really appreciated.
I attached below the board scheme

Did you try to short the jumper pads for the inverter on the underside of the FC?

In the images it’s asking you to do it for F.Port but there is another set to the left of those pads that might be for SBUS inversion.

For the GPS/Mag if you are flying Betaflight then Mag is of no use.

If you do intend to use the Mag then on some FC’s you can resource map Rx3/Tx3 as SCL/SDA via the CLI using the resource command.

iNav doesn’t allow resource mapping you will need a custom target.

(03-Nov-2021, 10:04 AM)kafie1980 Wrote: Did you try to short the jumper pads for the inverter on the underside of the FC?

In the images it’s asking you to do it for F.Port but there is another set to the left of those pads that might be for SBUS inversion.

Thanks for your kind answer, as u can see on the original pic there are only two couples of jumpers to be soldered (circled in red) but as the image is asking it look like they are both reserved for F.Port inversion, or may be 2 jumpers are for F.Port and the other 2 for SBUS inversion, but it's not clear, I will try soldering one couple of jumpers first to see if it's working.

I am just guessing here but F.Port inversion would just require one set of pads to be in continuity so why the additional set of pads? What are those pads for and I can find a source that labels them. But I have a hunch that those are the inverter pads for SBUS.

You could email AirBot directly and ask to be sure: https://store.myairbot.com/

(03-Nov-2021, 10:10 AM)kafie1980 Wrote: For the GPS/Mag if you are flying Betaflight then Mag is of no use.

If you do intend to use the Mag then on some FC’s you can resource map Rx3/Tx3 as SCL/SDA via the CLI using the resource command.

iNav doesn’t allow resource mapping you will need a custom target.

I intend to use GPS/Mag on iNav which I read have a target named FIREWORKSV2 already mapped Rx3/Tx3 as SCL/SDA

(03-Nov-2021, 12:25 PM)kafie1980 Wrote: I am just guessing here but F.Port inversion would just require one set of pads to be in continuity so why the additional set of pads? What are those pads for and I can find a source that labels them. But I have a hunch that those are the inverter pads for SBUS.

You could email AirBot directly and ask to be sure: https://store.myairbot.com/

I'm guessing the same, it's weird have two pads for only F.Port. As you suggested I e-mailed to Airbot to have clarifications also asking for a manual for this nano v6.1 board considering that this version (6.1) is not listed on their website and cannot get any information from the producer but only a few details and pics from the reseller (Banggood).
Thanks again for your help