Local Viessmann E3 CAN-bus to MQTT bridge for Vitocal heat pumps. Features Home Assistant Auto-Discovery, ESP32 firmware, and Open Hardware.
home-automation smart-home home-assistant openhab iobroker can-bus viessmann heat-pump evcc vitocharge-vx3 vitocal-200 vitocal-250
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Updated
Oct 6, 2026