I bought a Xiaomi Mijia Bluetooth Temperature Humidity Sensor at Tmall.com. The price is RMB 67.90, converting to CAD$13.56. No tax added.

It has a LCD screen. Powered by one AAA battery.

Let’s look at the specification.

Product model: LYWSDCGQ/01ZM
CMIIT ID: 2017DP4004
The product body weight: 36 g
The base weight: 7 g
The screen size: 1.78 inch
The temperature range: -9.9 ℃ ~ 60 ℃
Humidity range: 0 ~ 99.9%
Rated power: 0.18 mW
Powered By : Batteries (AAA) x 1

Here are some pictures I took when I open the package and install it.

In the package
In the box


Items in the box

The left upper item is base. There is a sticker at the back. So you can stick it on the wall. The base  is attached with a magnet which can hold sensor  body.

The working condition of the sensor.

The picture above also shows the comfortable temperature and humidity.

One AAA battery for a year.


One of the best features of it is Mijia App, or Mi Home App.

How to install Mi Home and check the number on your phone?

  • After Install ‘Mi Home’ on your Android phone, you need to set using local as “Mainland China”, please do not select other locals.
  • Press the “+” button at the top right corner.
  • Choose the “Add device” option.
  • Choose “Mi Bluetooth Hygrothermograph” and follow the instruction.
Here is a screen shot of the app.
Mi Home App

I check the firemware version through the App. The current version is 1.0.1_0066.

David Yin

David is a blogger, geek, and web developer — founder of FreeInOutBoard.com. If you like his post, you can say thank you here

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