Aqara contact door lock sensor

Along with a soldering gun, magnet and disassembled aqara contact sensor this will allow you to build a door lock sensor for a uPVC type door. I posted this on the homeassistant forums and have had a few requests for the files so uploading here.

I must have printed the 3d mount about 20 times before I got one that fit perfectly and didn’t obstruct the lock but this is my solution. I'm by no means a designer and I was getting a bit tired towards the end so excuse the design but once in the door it works perfectly for me.

Goals for me are:

- UK smart locks are still pretty poor and bulky, especially if you have a lift to lock multipoint system. I don’t need to lock the door, I just want to know it’s locked when out/going to bed.
- Easy access to replace the battery in the device.
- Longevity and reliability. Springs lose their “spring” and switches have finite lifespans.
- No alterations to the door and the device must not be visible when the door is closed. You shouldn’t re