Switched from OSDK Expansion module to E-Port Development kit but I have an issue with the connectivity [Matrice 300 RTK + Jetson Xavier NX]

[Yiannis15]

Hello!

I am using the Jetson Xavier NX and the DJI Matrice 300 RTK. I've been using the dji osdk expansion module for some time which has been working well. I am using the /dev/ttyTHS0 (GND, RX, TX pins on the jetson and the module) and /dev/ttyACM0. I recently switched to the e-port development kit and I am trying to run the OSDK.

The issue I have is that even though the ttyACM0 works and has data traffic the ttyTHS0 does not seem to work.
I tried

inverting the RX, TX pins.
used all the baud rates in the dji assistant and in the config file.
Updated the drone to the latest firmware
Tried many cables to connect the pins
I check the traffic of ACM0 and THS0 using cat and screen on Linux.
Do you know what might be the issue?

Thank you for your time.

[dji-dev]

Agent comment from Leon in Zendesk ticket #127851:

Hello, this may be a serial port compatibility issue. The onboard serial port may be affected by frequency deviation. We recommend that you use USB-TTL (FT232 model) to try connecting.

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