Aqara contact door lock sensor

thingiverse

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 really know it’s there. So it needs to be battery powered and no cables/boxes sticking out from the door frame.No magnets drilled into the locking bolt - home insurance!I've had these running in my doors for well over a year now and they've worked perfectly - one manages the back garden lighting so I know how well it's working. Time will tell but as there’s no parts to wear apart from the battery I’m not expecting any failures. Left and right side files included, see the attached pictures to see which you'll need for your door orientation, print upright. Pick the biggest magnet you can find for your lock and expoxy it on the end of the bolt. Desolder the reed sensor from the board, place it within the sheath on the 3d print and solder the ends back via cables.