Today we received a new smart device from Kerui. It can work with Kerui alarm system but also with Sonoff RF Bridge.

In my case, I am using Sonoff RF Bridge connected to Node-Red and I will post a tutorial on how you can make your own smart doorbell.

This device can be used as a doorbell but it can also be used as an emergency/panic button.

From the package:

  • Waterproof (I don’t know what grade but it’s well build )
  • 433 MHz
  • Transmission distance is up to 100m in open area
  • 12V battery – included
  • Comes with some two-sided tape for easy installation

You can order it from here, it’s about $5.