After years of searching for a reliable and affordable Zigbee recessed door sensor, I decided to take matters into my own hands. I stumbled upon the Visonic MCT-370 sensor, priced at just $16 on eBay, and thought it would be the perfect starting point. Here’s how my DIY journey unfolded:
The Build Process
- Repurposing Components: I removed the Visonic sensor from its housing and utilized the housing from a Monoprice sensor I already owned. To make it fit perfectly, I carved down the Visonic battery holder using a rotary Dremel tool and glued it to the modified Monoprice housing.
- Reed Switch Replacement: The original glass reed switch was fragile, so I opted for a non-glass alternative from eBay. This switch proved to be much more sensitive and didn’t require horizontal orientation, making the installation process smoother.
- Battery Holder Modification: I drilled a small hole at the top of the housing to facilitate easy battery replacement. This was a crucial step to ensure long-term maintenance without hassle.
- Final Assembly: After soldering the battery terminals and ensuring all connections were secure, I tested the sensor in my existing recessed door hole. It worked like a charm!
Results
The sensor now pairs seamlessly as a “thing” in my system, providing accurate open/close status, battery life, and temperature readings. The sensitivity of the non-glass reed switch has been a game-changer, and the battery life is significantly better than my previous Z-Wave sensor.
Tips for Aspiring DIYers
- Start Small: If you’re new to DIY projects, begin with simple modifications before tackling more complex builds.
- Invest in Quality Tools: A good Dremel tool and precise soldering equipment can make or break your project.
- Experiment with Components: Don’t be afraid to mix and match parts from different devices to achieve your desired outcome.
This project has been incredibly rewarding, and I’m excited to tackle more DIY smart home solutions in the future. Huge thanks to the community for all the inspiration and knowledge sharing!
If anyone has questions or wants to share their own DIY experiences, feel free to reach out! 