I'm using microwave motion sensor in my master bathroom, it works perfectly, a slight movement will trigger lights on, unlike PIR, it is 360 degree detection

The microwave motion sensor can be bought in Taobao or Aliexpress, Taobao is more cheaper, becareful if you get 5.8Ghz one, it could interfere with 5Ghz WIFI.


https://www.aliexpress.com/item/220V-Auto-I...iceBeautifyAB=0

This post has been edited by Kiding: Sep 4 2018, 12:22 AM

The PIR Motion sensor:

https://www.clipsal.com/sensors
https://shopee.com.my/TB-220V-240V-Infrared...AiABEgLGZvD_BwE

It can detect the body heat even if you shower with ice

Like I mentioned, use PIR motion sensor, i.e. it detects motion and body heat at the same time.

how many you install in your house?

The motion sensor will detect motion for sure. So, so as long as there is movement, it will be kept triggered. If you have bathroom curtain, the wind might move the curtain and trigger the light. That is why I proposed PIR motion sensor. This sensor will prevent false triggering of the light. The PIR sensor uses both motion and infrared (through body heat) to trigger. This is not expensive and easy to install. You can set the ambient light, trigger when the bathroom is dark to certain level. It also has timer to delay power off in most model.

I actually do not understand why people talk about connecting the sensor to sonoff. The sensor is already smart by itself and require no intervention. What else need to be remotely controlled. You can bypass the sensor using the existing switch to bypass sensor. You just need to connect sensor in parallel to the switch. So, either sensor or wall switch can light up the light in the bathroom.

No, I do not have any motion sensor in my house. Always thinking of putting but never did. Maybe because it is not a problem to switch light on and off once enter or leave the bathroom etc. Never forget about the light either

i have some Aqara motion sensors which are PIR and for some reason they will turn off your lights even when you are still standing there.
I read other brands also act the same way. If you depend on them to keep the lights on then you will realize that they dont always work

Fuhhh very good

A good one should be able to set sensitivity. You don't want to light to switch on when your cat is having shower. Cat does not need light

Setuju2

Don't detect motion lah. The actual name is Passive Infra Red (PIR)

WIKI
The sensor macam the Predator hunter eye that see Arnold Susahnakeja.
Don't believe ah? Try moving a 'cold' object across the sensor and see it got trigger or not.

The Sonoff is just one of the way of implementing the trigger to the light. Same as the door sensor with On and Off code.
There is a lot of ways to implement smart home and it is just a matter of preference.

Yup, some PIR are wonky mia.

Wah... so poor. I guess it depends on the sensor sensitivity. Anything above 0 Kelvin emits heat energy. So, is depends on how sensitive the PIR sensor. The sensor does not radiate any signal because it is passive. ..... or perhaps ypu are cold blooded

That is why I said PIR Motion sensor, not PIR sensor. PIR motion sensor combines both IR and Motion sensors.

Can you please explain the 'Motion' part, please? How it works?

Anyone can enter your bathroon line that la

Is it becoz of the setting, anyone have other fedback pn this aqara PIR,

The reason need to connect to other sensor is to light on the light and no depend on the PIR light which not so bright

This post has been edited by kelembai: Sep 4 2018, 09:18 AM

PIR sensor has detection angle issue, it can only detect motion at certain angles, and sometimes if your body is cold (after taking cold shower), it will be difficult to detect human body motion.

because thats how it works la
i quote, "it detects human movement using passive infrared"

https://cdn.cnbj2.fds.api.mi-img.com/cdn/aq...art%20Guide.pdf

bottom line is it must detect motion or no motion in order to do something. please show me a PIR sensor that detects stagnant body heat only

This post has been edited by idoblu: Sep 4 2018, 09:21 AM