# Help with uXRCE-DDS to serial connection - Pixhawk 6c

**URL:** <https://discuss.px4.io/t/help-with-uxrce-dds-to-serial-connection-pixhawk-6c/32528>\
**Category:** PX4 Autopilot\
**Created:** [June 2, 2023, 6:15pm UTC](https://discuss.px4.io/t/help-with-uxrce-dds-to-serial-connection-pixhawk-6c/32528 "2023-06-02T18:15:42Z")\
**Posts on this page:** 1\
**Showing post:** 5

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**Author:** ![Benja](https://discuss.px4.io/user_avatar/discuss.px4.io/benja/32/11872_2.png) [@Benja](https://discuss.px4.io/u/Benja)\
**Post date:** [June 2, 2023, 10:19pm UTC](https://discuss.px4.io/t/help-with-uxrce-dds-to-serial-connection-pixhawk-6c/32528/5 "2023-06-02T22:19:20Z")

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Hi @Mitch ,

- Can you try with a USBtoTTL adapter?

- Did you compile the agent from source?

- Can you also check the serial link, running for example a mavlink console on it? (disable uxrce\_dds\_client, re-enable MAVLINK on telem2)

As suggested on Discord, it could be that the serial port on the jetson is not “free”. If so, then with the USBtoTTL adapter it should work, while MAVLINK on the serial port should not.

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