kw2

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yoda-jm / vcontrold-go

Read and control a Viessmann heating controller over Optolink (KW2 protocol) in Go, with MQTT and Home Assistant auto-discovery. Verified on a Vitotronic 200 KW2.

golang home-automation mqtt iot smart-home home-assistant heating boiler serial-communication viessmann optolink vcontrold vitotronic mqtt-discovery kw2

Updated Aug 10, 2026
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