An Emergency Stop Button with ZigBee and Home Assistant

Hey nerds 🤓

I made the button—the button every Home Automation nerd needs and wants.

Translation:

How useful is this?
You smell.

The cool thing about this button:

• wireless via ZigBee
• good battery life
• Only wires are needed when you use the Aqara Water Leak Sensor

When the button arrived, I happened to have an Aqara Door Sensor in my drawer. So I took that one, opened it, soldered two wires onto it, and tested the button.

Actually, I would prefer the Aqara Water Leak Sensor. Then there is not soldering and tinkering needed. You just attach 2 cables via the screws and you are good to go. I am using one right now for my cat doorbell in Home Assitant. I checked the size and it fits as well.

You can use a hot glue gun. I wanted to get it out easily when the battery needs changing therefore I used some of the awesome 3M Dual Lock Fasteners.

There is also a version that can only be reset when you turn the key. This can be pushed without the key but unlocking only works by turning the key.

This could be used as a condition in Home Assistant. For example as a lock for certain things like turning on your TV, only when the parents are home 📺

I am curious about your ideas for the version with the lock. I am in need to justify the purchase 😉

Affiliate Links

If you want to build this as well, here are the parts I used. To be transparent: I get a small commission from these links.

• Emergency Stop Button
• Emergency Stop Button with Key
• Aqara Water Leak Sensor
• Aqara Door and Window Sensor
• 3M Dual Lock Fastener

• Emergency Stop Button
• Emergency Stop Button with Key
• Aqara Water Leak Sensor
• Aqara Door and Window Sensor
• 3M Dual Lock Fastener

Have a great day! 👋