Hi there,
I've bought my first drone a week ago from second hand and wanted to update firmware in receiver (XSR rev1.1), transmitter (Taranis QX7) and FC (Revolt V2).
I've plugged into betaflight and have done all that stuff (latest OpenTX into Taranis, latest Revolt into FC and latest V2.** into transmitter and receiver). I also binded transmitter with receiver (it shows still green light), but when I plug in drone into PC and go into Betaflight I can't see any changing parameters in Receiver tab. My gyroscope works but not receiver. I've also tried flying on a simulator and Taranis do a great job. Do you have any ideas what can be wrong?

DUMP:https://pastebin.com/42vpHsdM

Can you please run both the "dump" and "diff all" commands in the Betaflight Configurator CLI tab and copy/paste the results back here.

Please also post some good clear photos of the actual wiring and connections between your receiver and flight controller.

Diff all: https://pastebin.com/5ZTQHbhm
Dump: https://pastebin.com/42vpHsdM

OK, it looks like setting this up might be a bit more complicated than then for other non-REVOLT FC's. First of all, make sure your solder connections are solid and that there no short circuits to each other or to GND or 5V (use a multimeter to double-check that). Once you've done that, have a read of the article linked to below and follow what it states to do in steps 1-6...

https://github.com/betaflight/betaflight...-(V1-&-V2)

(01-Apr-2021, 09:28 PM)SnowLeopardFPV Wrote: OK, it looks like setting this up might be a bit more complicated than then for other non-REVOLT FC's. First of all, make sure your solder connections are solid and that there no short circuits to each other or to GND or 5V (use a multimeter to double-check that). Once you've done that, have a read of the article linked to below and follow what it states to do in steps 1-6...

https://github.com/betaflight/betaflight...-(V1-&-V2)

I checked with multimeter 5V with GND and it showed me up around 4.3k Ohm's. Is it normal? I was soldering this receiver board few days ago, I'm beginner and it's possible that I overheated it. I checked also my other receiver FS-iA6B and it shows 40k Ohm's. I checked this link and I've already done these steps.

(01-Apr-2021, 10:00 PM)Remek2GO Wrote: I checked with multimeter 5V with GND and it showed me up around 4.3k Ohm's. Is it normal? I was soldering this receiver board few days ago, I'm beginner and it's possible that I overheated it. I checked also my other receiver FS-iA6B and it shows 40k Ohm's. I checked this link and I've already done these steps.

That resistance is fine with things connected to the 5V rail. If you've tried all the steps in that article then I don't know what the issue is. Unfortunately I don't own one of those FC's so I can't even do any troubleshooting for you to confirm what does and doesn't work.

It's possible you have hardware issue with the XSR. Do you have another FrSky receiver you can try? It doesn't need to be another XSR. Just one that outputs an SBUS signal.

Alternatively do you have another non-REVOLT FC that you can try your XSR on?

If we can confirm / eliminate which piece of hardware is to blame then at least it will be one step in the right direction from a troubleshooting perspective.

I can try it on my other FC which is Naze 32. 
It is this my board: https://usermanual.wiki/Document/Naze32r...24617/view

But I'm not sure to which pin I have to plug in my XSR with SBUS signal. Is it pin number 4?

Yes, on the Naze32 Revision 6 FC you need to connect the SBUS signal wire from the XSR to pad #4 on the Naze32. In Cleanflight / Betaflight you then need to enable "Serial RX" on UART2 (and disable "Serial RX" for all other UARTs), and set your Serial Receiver Provider to be "SBUS".

You might also be best advised to install Betaflight on the Naze32 so you are on the latest flight control firmware. The last version of Betaflight to support the Naze32 was Betaflight 3.2.5, so you would need to install that particular version.

I tried plug in Naze32 with XSR but same problem....
Now i will try to plug in receiver FS-iA6B with my Transmitter FLYSKY  to Revolt FC (I have assurance that this receiver works). I would like to plug it in via IBUS but I'm not sure if these solders are ok and if Revolt supports IBUS. Do I have to change signal on FC to uninvertet signal right?

An IBUS signal needs to be connected to an UART RX pad (i.e. RX3). Don't forget to also change "Serial RX" to be on UART3 instead of UART4 and set the Serial Receiver Provider to IBUS. I don't know if you still need that jumper wire between RX1 and TX1 so it might require some trial and error.

(02-Apr-2021, 01:53 PM)SnowLeopardFPV Wrote: An IBUS signal needs to be connected to an UART RX pad (i.e. RX3). Don't forget to also change "Serial RX" to be on UART3 instead of UART4 and set the Serial Receiver Provider to IBUS. I don't know if you still need that jumper wire between RX1 and TX1 so it might require some trial and error.

Okay, I finally got it!! The issue was i overheated receiver when I was soldering it few days ago. I checked my drone with other receiver and it worked so Fc was ok. I already bought new receiver which is R-XSR. Thank you so much Leopard!