The technique developed for the 'tuyaTRIGGER' feature of the tuyaDAEMON project (an IOT framework), uses a Tuya switch as a dual port HW register.
Better, the switch is still usable as an IOT switch, only the countdown function is required.
A downsized implementation (3 nodes only) allows you to add remote control (from anywhere) and voice control to any node-red flow.
Hope that this gives you great ideas.
Best regards
m.s.
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