micro-ROS publisher always printing "dat:0" on ROS2 echo instead of the updated values

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[MAIN.C 6.txt](https://github.com/user-attachments/files/21734883/MAIN.C.6.txt)

I am working on a micro-ROS example on a TRAVEO™ T2G MCU using a custom UART transport. The code is based on the "data

[MAIN.C 6.txt](https://github.com/user-attachments/files/21734876/MAIN.C.6.txt)

" style micro-ROS publisher/subscriber example, but I have modified it slightly.

Here is the situation:

1. I have a publisher that is supposed to send an integer value (std_msgs/msg/Int32) periodically using a ROS timer.

2. I am running ros2 topic echo /traveo_publisher on the host PC to see the published messages this will give value never changes to from 0 . it is publishing periodically but within same incorrect value.

3. I am successfully connecting to the ROS 2 agent (no connection error), and I do see messages being published.

4. However, the message always shows data: 0 instead of the value I expect (for example 123 or incrementing numbers).

5. The value does not update continuously as I move around in my code or directory — it just stays the same in ROS 2 echo output.

Start with the attached MAIN.C 6.txt files and the micro-ROS data publisher/subscriber example, then run ros2 topic echo /traveo_publisher against the TRAVEO T2G custom UART transport. Trace where the std_msgs/msg/Int32 value is assigned and published; done means the echo output reflects the expected or incrementing value instead of always showing data: 0.

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