Power iot devices

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let s have new appartment , can plan required wires smart home devices.

what think better:

1) put 220v, 0v, ethernet wires controllable devices (switches, sockets, etc)
then need voltage regulator 220v 3.3v every device.

2) put 220v, 0v, 3.3v dc (voltage regulator placed in center of wires), ethernet.
this way dont need voltage regulators everywhere.

are there other variants , problems can face solutions?

12v on beefy cables: can run including led light bulbs, , can directly connect battery , solar power.


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