AC powered motion detector with wifi connection

Calimero444 · October 20, 2025, 11:20am

Hello

Can’t really understand why this does not seem to exist.
I am looking for a motion detector that can basically be inserted into the wire and can also be “switched” via wifi:

AC power -------- wall switch (will be disabled) -------- wire ------MOTION DETECTOR ------------------ lamp

Powered by the AC, it switches a relay on motion detect and/or wifi command.
Any ideas ?

regards,
GN

ShadowFist · October 20, 2025, 7:24pm

It seems to exist, but it’s Tuya https://www.amazon.com/Presence-WenzhiIoT-Movement-Detection-Lighting/dp/B0D94QG1C6
Wifi AC relay module with a dumb AC motion detector output hooked into the relay switch input port.
Build your own with ESPHome Compatible smart and small 240v PIR/relay?

Karosm · October 20, 2025, 10:46pm

Any decent smart relay with S input connected to ac powered motion detector could do that. Are you looking for some all-in-one solution?

peterxian · October 21, 2025, 12:41am

I’m not clear what form factor you are looking for, but I have a number of these wall switches that report both a binary sensor for motion and have a relay (switch) controlling the output (lights). All over WiFi, with open source Tasmota firmware: