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Comfoair E300/400 esphome unit
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Case for ESP32, RS485 to TTL module and DFRobot GP8211S DAC module used to control Comfoair E300/400 units
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Updated at source:
Model information
- Source
- Printables
- Category
- Electronics
- License
- Creative Commons — Attribution
Case described in: https://m11tch.github.io/blog/2026/02/25/zehnder-comfoair-integration.html
I've added version 3.0 of the openscad file which allows enabling/disabling the DAC module.
Bill of Materials
Standard RJ45 Network Cable (for the C3 connection)
Depending on the tolerances the modules fit loosely in the case, you can optionally use some hotglue to further lock them into place if desired.