Q450 compatibility confirmed / tested?

[ihergor]

Hi @vincentmakes,

First of all, thanks for putting this together — it looks like a great open alternative to ComfoSense/ComfoLan C.

I have a Zehnder ComfoAir Q450 and I'm considering building this project to replace the official bridge. The README focuses on the Q350, so before ordering the Waveshare board I wanted to check:

• Has anyone tested this firmware against a Q450 (or Q600) unit specifically?
• As far as I understand, the Q350/Q450/Q600 share the same ComfoNet CAN bus and PDO/RMI protocol (same as the official comfoconnect/aiocomfoconnect integration, which supports all three under one codebase). Is there anything model-specific in your implementation (PDO IDs, fan speed ranges, sensor scaling, etc.) that could differ between models?
• If it hasn't been tested on a Q450, is there anything specific you'd want me to check/report back if I try it?

Happy to test on my Q450 and report back with logs if that's useful for a compatibility list.

Thanks again for the project!

[vincentmakes]

Hi @ihergor

I have not tested on Q450 but fairly confident it will work.

The ComfoNet CAN bus is using most of the RMI/PDO command protocol from Michael Arnauts' aiocomfoconnect mapping . I have only a couple of addition to it, on time management for instance.

That protocol is identical across the Q350 / Q450 / Q600 : they're the same product family with the same ComfoNet bus and the same ComfoConnect LAN C / ComfoSense controllers. The Q number mainly denotes airflow capacity (~350 vs ~450 m³/h), not a different communication protocol.