Though since it's trivial spoofed I don't know why you'd bother.
Something like this really needs a periodic refresh or some proximity proof like NFC.
At this point just knock!
Crazy the doorbell replaced knocking and now the internet is replacing doorbells.
Who invented doors? Perhaps that’s where it all went wrong. /s
We're willing to offer a $7M seed at a $50M valuation for your knock technology.
Something something Knockchain
Only if you knock technology uses AI :)
And only if by "uses AI" you say it has AI inside the hardware but really it's a network-enabled thin client that calls out to a server wrapping GPT calls.