# Missing topics when using uXRCE-DDS with Raspberry pi and the latest firmware (v1.15.0)

**URL:** <https://discuss.px4.io/t/missing-topics-when-using-uxrce-dds-with-raspberry-pi-and-the-latest-firmware-v1-15-0/40892>\
**Category:** ROS 1 / ROS 2\
**Created:** [September 26, 2024, 10:20am UTC](https://discuss.px4.io/t/missing-topics-when-using-uxrce-dds-with-raspberry-pi-and-the-latest-firmware-v1-15-0/40892 "2024-09-26T10:20:14Z")\
**Posts on this page:** 1\
**Showing post:** 3

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**Author:** ![dairycowp](https://discuss.px4.io/user_avatar/discuss.px4.io/dairycowp/32/19033_2.png) [@dairycowp](https://discuss.px4.io/u/dairycowp)\
**Post date:** [June 5, 2025, 8:25am UTC](https://discuss.px4.io/t/missing-topics-when-using-uxrce-dds-with-raspberry-pi-and-the-latest-firmware-v1-15-0/40892/3 "2025-06-05T08:25:13Z")

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Thank you a looooot! you are saving my life.  
I turned SYNCT=0 when using Gazebo simulation and turned it to 1 when connecting to hardware on my Ubuntu24.04 PC&Jazzy.  
But just cannot communicate when I switch to Jetson Ubuntu20.04&foxy. So I turned it back to =0, THEN EVERYTHING FLOWS SMOOTHLY.

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_[View the full topic](https://discuss.px4.io/t/missing-topics-when-using-uxrce-dds-with-raspberry-pi-and-the-latest-firmware-v1-15-0/40892)._