Alternate case for Xiaomi Motion Sensor Motherboard with CR123 battery holder

thingiverse

This is an alternate case I created for the Xiaomi Mijia Motion Sensor motherboard. I have deployed seven of these alternate sensors around my home and am thoroughly pleased with their performance. To connect the battery, you must remove the terminals from the motherboard and solder on wires, which then run down the back of the main case where you can attach 3D printed positive and negative battery terminals. I simply ran a wire through each of the four pins on the battery terminal, finding this to be plenty sufficient for my CR123 batteries. To fit into the new case, I had to shorten the motion sensor plastic component by a small amount. I also modified my motion sensors to enter debug mode, which detects motion every five seconds. With the larger CR123 battery, battery life should last around 2.5 to three years. Unmodified, the battery life with the CR123 should be approximately five years. The included Panasonic 620mAh capacity 3V CR2450 battery was replaced with a 1500mAh capacity 3V Energizer 123 battery in my alternate case. Note that this model requires printing support structures. XYZprinting branded 3D printer owners are advised to use the .3w file extension, as these files are pre-configured with exact print settings used for production. Those using STL files may need to experiment to find suitable support structures within their 3D printing software. https://community.smartthings.com/t/making-xiaomi-motion-sensor-a-super-motion-sensor/139806 https://data.energizer.com/pdfs/123.pdf https://www.domoticz.com/forum/viewtopic.php?f=75&t=30801