How do I change my Node ID in PyUAVCAN?

Applications & Usage PyCyphal
1

Hi

I am using the pyuavcan demo application as a starting point for my own demo application to get familiar with how uavcan works.
Currently I am trying to implement the Register-API, specifically the uavcan.node.id register.
How do I change the Node ID in the demo application? I couldn’t find any function to change it. I looked through this forum, the pyuavcan documentation and the pyuavcan source code. But there is no mention of changing the node id. The only thing I found was that the demo app mentions that the node id is assigned statically here and most applications would need it configurable.

Any help or pointers would be appreciated. Thanks.

2

We have a new demo that is not yet public but it should answer your questions better than the current one:

https://pyuavcan--154.org.readthedocs.build/en/154/pages/demo.html

I expect it to go live in a few days assuming that the review is not going to take too long. To reproduce it locally, install the library and the Yakut tool directly from git:

pip install git+https://github.com/UAVCAN/yakut@orc

(this command will also pull in PyUAVCAN as a dependency)

3

Thank you for your response.
I looked at the demo and it’s much clearer now.

I gave the demo a try but the node id wasn’t stored persistently. Writing a new node id via the register API worked and the new node id was in the response of the register call. But once i restarted the node it was back to the old id.
Did I forget something?

4

Sounds like you restored the original node-ID via environment variables at the second launch. Make sure to unset UAVCAN__NODE__ID.

5

Yes. That was it. Thank you again.