Cheap supported PIR sensors

[Ankan]

I would like to have suggestions on cheap working PIR sensors that I can have in all rooms to control what lights can be turned off and on automatic.

[SweetPants]

Did you search the forum?

[Ankan]

I tried to, but I had problem to find anything in interest.
Maybe I should be more specific.

The sensor should use 433mhz or wifi. The nexa sensor cost about $20, so I think cheap is max $10 each as I need let's say 10-15 sensors.

I don't know if it is preferable to have it mounted in the roof. However it should be not to big like some motion sensors on ebay that have one or two 20-30cm antennas.

Edit:
I have a rflink and was looking at the support list of 433 mhz devices, but it's hard to know if a device is a motion sensor or just a light switch.

[Eddiever]

I bought one from Alie:
https://nl.aliexpress.com/item/433MHz-W ... 58313.html

[Ankan]

Thanks, I will try that one. I like my nexa motion sensor as it is so small (flat) but I guess you can't get everything from China. (good price AND good looking product)