micro-ROS Agent on Raspberry 5 with /dev/AMA0 does not work

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Hello,

I have setup a micro ROS Agent on a Raspberry PI 5 and connected to microROS client with UART. The UART on the PI is connected to Pin14/Pin15 (Rx/Tx) with /dev/AMA0. Which does not work. I get no connection to client.

If I connect a FTDI USB-UART serial adapter the USB port and connect the agent to port /dev/ttyUSB0 it does work as expected.

The UART AMA0 connection to my PC does work, which I have tested with the minicom terminal and hTerm

This is my setup
- Hardware description: Raspberry Pi 5
- RTOS: Ubuntu 24.04
- Installation type: micro-ROS Agent
- Version or commit hash: micro-ROS iron

Does anyone have an idea why it does not work with the onboard UART. Are there any special settings I need to make?

many thanks in advanced

Commencez par vérifier la configuration de l’UART intégrée du Raspberry Pi 5 pour /dev/AMA0 et comparez-la à la configuration FTDI fonctionnelle sur /dev/ttyUSB0. Examinez ensuite la configuration indiquée d’Ubuntu 24.04 et de micro-ROS Iron, puis vérifiez que l’Agent peut établir une connexion via l’UART intégrée sans modifier le client.

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