Meross Door and Window Sensor

Meross were kind enough to send us their new Door and Window Sensor for us to do an honest review, give them feedback and to let you all know what it is and how it works…so let’s go!

Contents inside the box:

  • 1x Smart WiFi Hub
  • 1x USB Type A to Micro USB (about 25cm in length)
  • 1x Power Adapter (EU Type)
  • 1x Sensor
  • 2x Double sided tape (for the sensors)
  • 1x User Manual
  • 1x Metal Pin (to be used for hardware reset)

(Places a pen there so you would get an idea of how tiny this thing is.)

The power supply which is intended to power the Meross Smart WiFi Hub is only 5Volts and consumes only 1.0A (5Watts).


  1. Download the Meross App from the Apple Store or from Google Play.
  2. Connect your phone to a 2.4GHz WiFi Network (this device only works through 2.4GHz because or signal reliability)
  3. Launch the Meross App and Login/Register.
  4. Connect the Smart WiFi Hub to the electricity and you will notice that a tiny light will start flashing. This means that the device is ready for pairing.
  5. Click on the “+” icon on the top right hand corner to add a new device.
  6. Here I was searching for WiFi Hub, Smart WiFi Hub, Door and Window Sensor but couldn’t find any then I noticed I need to choose the “Smart Sensor and Alarm” option.
  7. Choose MS200 (our Door and Window Sensor)
  8. Follow the on screen instructions, simple 🙂
  • Once the initial setup is done, you can go ahead and connect the device to the door or window you want to monitor.


Push notifications on the phone are almost instant. Once the device is triggered, you’ll get an alert in less than 2 seconds (assuming you have your phone connected to the Internet/WiFi).

The Meross Sensor can be set to provide you with different types of notifications:

  • From Closed to Open state
  • From Open to Closed state
  • In Open state for more than 1 minute
  • In Closed state for more than 1 minute
  • Low battery


Within the Meross Application, one can start configuring automation.


Coming back home- when the Meross Sensor changes from Closed to Open state, switch on a Meross bulb.

Leaving home – when the Meross Sensor changed the state from Open to Close, switch off the garage bulb.

If we want to go even further then, we can run something like Home Assistant and configure this sensor in congunction with other sensors in the house to do something more intelligent.

Imagine if are at home with the AC on (windows closed) and you want to make sure that if someone opens the window or a door in a specific room for more than 1 minute, the AC should switch off automatically. 🙂

Build Quality:

I am quite happy with the quality of the Sensor. The plastics being used to build this sensor is excellent.

If I want to be picky (and I will be) I have 2 MINOR complaints.

  1. The Smart WiFi Hub using still using Micro USB. Why not using Type-C?
  2. The Micro USB connector seems to be a little bit too short and it seems like the connector is connected only half way. Possibly, there will be people who will force it further in and breaking the entire WiFi Hub.

Getting your hands on the Meross Door and Window Sensor

Direct link: here

10% Off Discount Code: smarthome247

Enjoy it! 🙂

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