We are using a pixahawk 6x and holybros telemetry radios without a problem, then out of the blue there was no connection to qgc through telemetry (using usb was still working without issues)
We have tried switching cables in both the pc and the drone and making sure the baud rate and mavlink version parameters are correct
Hi. Am am working on a new build that uses SiK/Holybro 915mHz telemetry radios. If I power up the 6x using usb from my computer, telemetry radios initialize without issue. I can then disconnect usb and qgroundcontrol switches over to wireless telemetry. However powering up the drone on battery, the telem module has solid red. This indicates cts is pulled low and it puts the device in firmware update mode.
the PR on this could be releated but I am not sure: Pixhawk 6X: MAVLink not working on TELEM1 port · Issue #20762 · PX4/PX4-Autopilot · GitHub
At any rate, turning off flow control does not fix it. I had an extra JST-GH-6P cable and I cut CTS and RTS to test and the device works without issue. This confirms the pin is getting pulled low.
Is this the same problem you are encountering?