Hey everyone, I wanted to share a fun DIY project I recently completed! I built a smart doorbell specifically for our cat, and it’s been a great addition to our home automation setup. Here’s how I did it:
The Setup
I used an Aqara Water Leak Sensor and a pressure mat. The idea was simple: whenever our cat (or any curious feline) steps on the mat, it triggers the sensor. The sensor is connected to my Home Assistant setup, which then sends a notification to my phone and activates some lights in the living room. I even added a light directly next to the window to give the cat visual feedback—though I’m not sure if it’s helped with training, it’s definitely fun to watch!
The Process
- Hardware Selection: I chose the Aqara sensor because it’s reliable and integrates well with Home Assistant. The pressure mat was a bit tricky—I had to cut the cable from an old alarm system and connect it to the sensor using screws.
- Assembly: I secured everything with some hot glue and placed it in a small project box to protect it from the elements. It’s been working great so far!
- Configuration: I set up the sensor in Home Assistant and created a simple automation rule to trigger the notifications and lights.
Why It Works
Our cat is pretty lightweight (around 3.5 kg), so the setup works perfectly for her. I was initially worried about false triggers, but it’s been remarkably reliable. Plus, it’s a great way to keep an eye on our little furry friend!
Tips for Others
- Sensor Placement: Make sure the sensor is positioned correctly to detect even slight pressure changes.
- Light Feedback: Adding a light next to the window not only helps with training but also adds a nice visual cue for anyone nearby.
- Customization: If you’re into DIY, you can customize the housing to match your home’s decor. I kept mine simple for functionality, but there’s room for creativity!
Looking Forward
This project has inspired me to explore more creative ways to make our home more pet-friendly. I’m thinking of adding a similar system for our dog next! If anyone has tips or suggestions, I’d love to hear them.
Thanks for reading, and happy tinkering! 
