I need to go see if there has been a story written or a video made about how HomeAssistant went from an open source project to selling their own hardware. It's one of those rare cases where a FOSS company managed to monetize (I hope successfully) without messing with the license.

home-assistant.io/green/

I personally own and have had zero problems with their ZWave antenna.

home-assistant.io/connect/zwa-

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