RC Stick input - Not Registering in MP

ArduPlane VTOL Plane
1

I am building a Arugs Roc Wing PNP VTOL. I have decided to pair it with the Siyi unirc7 Pro with the pro air unit. It is using the Argus H7 Flight controller which is not mainstream but came installed. I am struggling to see any type if stick input on the Mission planner side of the equation when I try to calibrate the RC.

Here is what I know to be true:

  • My GCS and the Air unit are paired
  • The Air Unit is wired correctly based on the PNP User Manual (SBUS)
  • I was getting a Pre-arm error “Radio failsafe on” but that has since resolved
  • My Serial 7 (Uart6) Params are set to RC IN (23)
  • I have double checked my wiring. SBUS coming from the Air Unit has Ground and Signal > Ground and RX on the UART6 (noted in the SBUS diagram).
  • The UART1 on the air unit goes to the 5v - RX1 - TX1 - G on the FC (upper blue plug). Yes RX and TX are flipped on the FC side.
  • I am getting telemetry data from the FC on the GCS HUD
  • Sticks don’t register anywhere except on the GCS itself.
  • My GCS has a centering throttle stick (It’s what I have to work with for now.)

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I’m at a bit of a loss on where to go from here. I have followed instructions from Siyi and it should work…but it doesnt. I fear that I am missing some obscure setting somewhere.

Thanks in advance for any help you can provide.

2

Unless I missed it, I’m not seeing the hardware definition file for your FC.

Is it possible that that SBUS needs to use a different UART/Serial?

ETA: You might try setting SERIALx_OPTIONS = 3 for inverted logic.

3

Thanks Mike! Unfortunately the FC came in the plane already wired to the power, servos, etc. This FC does not have much documentation which is what is killing me. I will try the invert and get report back.

4

I changed the Serial7_option to 3 with no luck.

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5

Double check that there aren’t any other serial ports set to RC input (SERIALx_PROTOCOL,23).

When you’re troubleshooting, keep in mind that any changes to serial ports only take effect after you power cycle or reboot the controller.

6

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7

There’s no info out there for that controller… not a good sign. Just for giggles have you tried setting SERIAL 6 to match tx/rx6?

Might have to reach out to the manufacturer and ask them.

8

Will do, thanks for the input.

9

When you connect with mission planner what firmware does it say it has on it, it should say the flight controller build and version number, it’s probably using another controller as a template.