Because zwave is proprietary. There's money to be made here! Can you imagine the lost profit potential if people standardize on an open protocol like ZigBee?

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SEJeff an hour ago | parent [-]

It is so proprietary in fact all of the spec is on github:

https://github.com/zwave-js/specs

	▲	schubidubiduba an hour ago \| parent [-]
		Even with a spec on github, a protocol can still be proprietary, e.g. if companies have to pay to use it legally in products