D1 Mini Lite + PIR (HC-SR501) Enclosure by alanjames1987 on Thingiverse: https://www.thingiverse.com/thing:3366814

Summary:
An enclosure to hold a D1 Mini Lite and HC-SR501 PIR sensor.The HC-SR501 can give a lot of false positives because of signals from the ESP8266. This enclosure can make that worse because the D1 Mini antenna sits right below the HC-SR501. For this reason you shouldn't use this enclosure as a motion sensor to control things like lights, but it works very well for triggering cameras to record security footage or other things where a false positive wouldn't be unwelcome.For light motion sensors I've heard the AM312 is a better sensor but I haven't tested it yet.