Which Motion Sensor do you prefer

Hardware
1

Hi Guys,
Looking to add some motion sensors around the house to switch on lights & also to send notifications etc.
Which motion sensors you find that works well with HA, Google assistant etc and has good battery life.
Obviously reasonable priced?
I do have a Sonoff 433 mhz hub switch that I have flashed with Tasmotta .

Thanks

2

I am using an IKEA Tradfri motion sensor. It is connected by ZigBee using deCONZ and Conbee-Stick.
It’s made for indoor-use but should work outdoors too, if it is protected from weather.
The 2 CR2032 last for approx. 6 months.

Maybe this info will help you …

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3

Depends on your needs. I have two different ones:
The HUE ones provide you also LUX and temperature sensors.
Xiaomi is cheap but doesn’t provide you both of those.

So for areas where you don’t need automation based on the brightness of the environment go for a cheap one. If you need to do something based on ambient brightness get a slightly expensive one.

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4

Thanks , at the moment I only need the sensor to trigger a light and / or send a notification. Need to try and work with my existing Sonoff RF Bridge. ( 433 mhz )
Also that it has a reasonable battery life .

Thanks

5

Aluavin
Do you know if the Xiaomi connects to the Sonoff RF bridge ?
How does it connect to HA and do you need to flash the Xiaomi

Thanks

6

I have Xiaomi PIR’s - and they are zigbee - so need a hub of some sort (I have the xiaomi gateways as a hub linked through HA).

There are 2 versions - the newer ones have light levels also.

My only issue with them is they only update status ~ every 2 minutes - so if they are triggered, they will not trigger again until after 2 minutes.

I have used RF PIR’s in the past (using RFLink).

Sonoff might be able to handle cheap RF PIR sensors - beware though that if you have a few, they can clash as they are one way communication. In other words, if one RF sensor triggers at the same time as another RF sensor, your sonoff may “hear” only one, or even neither due to the signal clash.

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7

Yes, I have cheap motion sensors which perform very well except that they too ‘go to sleep’ for three minutes after detecting motion four times within three minutes.

This makes it impossible to use them reliably for anything that depends on knowing the actual current situation, like controlling lights. There is no logic that I can come up with that deals with the ‘sleep’ time which could be anything from (just over) 3 minutes after first detection to (just over) 12 minutes.

Apart from setting the off_delay time to something like 13 minutes which is little long in my opinion.

Unless anyone here knows different :wink:

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