ESPHome firmware that turns a commodity ESP32 into a full local controller for a Zehnder ComfoAir Q ventilation unit, over the unit's own ComfoNet (CAN) bus. Native Home Assistant support, a standalone web UI, no cloud - an open alternative to the discontinued ComfoConnect LAN C.
home-automation iot esp32 reverse-engineering smart-home home-assistant canbus hvac ventilation m5stack zehnder comfoair esphome comfoconnect mvhr comfonet heat-recovery comfoair-q
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Updated
Sep 3, 2026 - C++