# Serial communication problem between PX4 and Nvidia Jetson Orin Nano

**URL:** <https://discuss.px4.io/t/serial-communication-problem-between-px4-and-nvidia-jetson-orin-nano/46736>\
**Category:** PX4 Autopilot\
**Created:** [July 31, 2025, 3:11pm UTC](https://discuss.px4.io/t/serial-communication-problem-between-px4-and-nvidia-jetson-orin-nano/46736 "2025-07-31T15:11:20Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![Yaydemir05](https://discuss.px4.io/letter_avatar_proxy/v4/letter/y/7bcc69/32.png) [@Yaydemir05](https://discuss.px4.io/u/Yaydemir05)\
**Post date:** [July 31, 2025, 3:11pm UTC](https://discuss.px4.io/t/serial-communication-problem-between-px4-and-nvidia-jetson-orin-nano/46736/1 "2025-07-31T15:11:20Z")

</div>

Ubuntu 22.04  
ROS2 Humble  
PX4 1.16

Hello everybody,

I’m controlling my fixed-wing plane (v-tail) with PX4 in CubeOrange+ . I’m trying to send ROS2 messages to px4 and in the simulation I can send them using the XRCE-DDS Agent. It all works and my plane in the gazebo works according to the messages. But nowadays I have been trying to communicate with my real plane and it doesn’t works. I use Nvidia Jetson Orin Nano Developer Kit to send ROS2 messages and I start my plane then I start my XRCE Agent. I think I can create the ros2 topics because when I go to my workspace and use the code

ros2 topic list

I can see that the topics have created and When I send offboard message for example it can be seen in the topic echo part but My plane doesn’t sees it.

I use Telem2 port to communicate with the computer and a FTDI FT232 Module to transform it to USB.

sudo /home/altek/px4\_ros\_uxrce\_dds\_ws/build/microxrcedds\_agent/MicroXRCEAgent serial --dev /dev/ttyUSB0 -b 921600 --max-payload 512

This is my code While I run my agent and I also change the baud rate to 921600 on my FTDI chip.

Can somebody help me with my problem I can’t send offboard signal but it normally works with the simulation.

---

<div class="post-metadata">

**Author:** ![realstone1](https://discuss.px4.io/user_avatar/discuss.px4.io/realstone1/32/12975_2.png) [@realstone1](https://discuss.px4.io/u/realstone1)\
**Post date:** [August 3, 2025, 10:15am UTC](https://discuss.px4.io/t/serial-communication-problem-between-px4-and-nvidia-jetson-orin-nano/46736/2 "2025-08-03T10:15:00Z")

</div>

Hi. I also experienced a similar problem when I used ROS 2 and DDS to connect the FC and the mission computer. In my case, it worked when I changed `UXRCE_DDS_SYNCT` to disabled.

---

<div class="post-metadata">

**Author:** ![system](https://discuss.px4.io/uploads/default/original/3X/7/3/73ce918bdcd64854de904f0c8d9ab70ca9723f2a.png) [@system](https://discuss.px4.io/u/system)\
**Post date:** [November 1, 2025, 10:15am UTC](https://discuss.px4.io/t/serial-communication-problem-between-px4-and-nvidia-jetson-orin-nano/46736/3 "2025-11-01T10:15:39Z")

</div>

This topic was automatically closed 90 days after the last reply. New replies are no longer allowed.