I want to use the Pixhawk 3 Pro with several components that require telemetry ports:
- Frsky telemetry module
- Serial connection to a Nvidia Jetson using Mavlink
- Radio Telemetry Kit provided in the pack
I was able to connect everything in Pixhawk 2: connecting the radio telemetry to TELEM1, Frsky to TELEM2 and the serial connection to SERIAL 4/5. Now, with the Pixhawk 3 Pro I am not able to use TELEM3/4 as the serial port to communicate with Jetson.
I have checked the different parameter options (I am using PX4 with QGroundControl) and I have been able to connect Jetson to the TELEM1 port configuring the port (/dev/ttyS1) in the extras.txt file inside the SD card. The Frsky module has also been correctly configured in the TELEM2 port (/dev/ttyS2).
My problem is that with this configuration I can not use the Radio Telemetry Kit, as it needs to be connected in the TELEM1 port.
Is there any solution to use the TELEM3/4 port for the Mavlink serial connection to use the Telemetry Kit or the Jetson connection?
Which are the devices for this TELEM3/4 port, are they ttyS3 and ttyS4?
Do I need flow control for these functionalities?
Thank you for your help!