Modify it with a 5-hole socket, keep 3 plugs and remove two plugs. One 20A relay on the board is used to control the on-off of 3 plugs, and one 220V to 5V module (removed from the mobile phone charger and drawn and packaged in actual size). When installing the infrared transmitter and receiver, remove the copper sheet of the two-hole socket and make holes to expose it. The overall size fits inside the switch cassette! !
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