PH 2.1 Cube 2x Telemetry (MAVLInk SiK & FrSky) & Companion

PX4 Autopilot Flight Controllers 💻
1

Hello PixHawk-Experts,

maybe someone can give me a hint, I have tried several things but did not find a solution.

Issue:
I would like to use the following setup:

  • TELEM 1 > MAVLINK via Holybro Telemetry Radio 433MHz SiK V3
  • GPS2 > FrSky Telemetry
  • TELEM 2 > Link to companion (used PH internally to link with Intel Edison)

But: I do not find a setting where both telemetry links (SiK & FrSky) are working.
Is this possible at all with the Cube?

My Setup:

  • Flight Controller
    Pixhawk 2.1 Cube FW 1.10.1
    (Currently: Intel Edison installed, linked internally on SERIAL2)
  • QGC 4.0.4 on Windows 10
  • Holybro Telemetry Radio 433MHz SiK V3
  • Craft & Theory Pixhawk telemetry cable
  • Receiver: FrSky XSR
  • Remote: FrSky Taranis X9D Plus

What I have tried up to now:

  • All components are OK and the cabling is OK.
    Reason: There are setup variants that work partially, see below.

Summary of table below:
1.) MAVLink Telemetry via SiK does only work on TELEM 1, but not on TELEM 2 or GPS 2
2.) FrSKY Telemetry does only work on TELEM 1, but not on TELEM 2 or GPS 2
==> Am I missing specific setup parameters?

PH21_TLM_Issue_2020-03-23 165406
PH21_TLM_Issue_2020-03-23 1654061186×392 105 KB

Note for all setups:
Companion (Intel Edison) is adressed via Serial 2 (TELEM 2) and MAV_1_CONFIG settings.

I am sorry if the solution is obvious, but I did not see it after reading dozens of telemetry threads.
Please let me know if you need more specific input.

Thank you & best regards
Jens

2

OK, I will answer to my own question :slight_smile:

I am talking about Config ID#02 above:

  • Craft & Theory Pixhawk telemetry cable is linked to the port labelled as “GPS_2”:
    PH2.1[GPS_2] ==> Craft & Theory Pixhawk telemetry cable ==> FrSKY Receiver S.Port

  • in Parameters/Telemetry/TEL_FRSKY_CONFIG there has to be selected “TELEM/SERIAL4”
    (and not “GPS_2”).

This serial mapping overview was helpful (I know this is an arducopter page…).

With this setting there is telemetry data available on the remote control (Taranis X9D Plus).

3

https://docs.px4.io/master/en/flight_controller/pixhawk-2.html#serial-port-mapping
https://docs.px4.io/master/en/flight_controller/pixhawk-2.html#serial_ports

TEL4 is labeled as GPS2 on Cube.