This is a 2-part indoor housing for the WeatherDuino Air Quality Monitor III with Sensorion SPS30 for particle measurement, MH-Z19 for Co2 measurement and 1.3 inch OLED.
You can find information about the WeaaterDuino here: https://www.meteocercal.info/forum/Thread-Air-Quality-Monitor-III-Overview
The SPS 30 is inserted into the front half of the housing and covered with the cover part. The OLED is simply plugged in and sits firmly. I used this Oled: https://www.amazon.de/gp/product/B078J78R45/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1
The AQM board is attached between the two halves of the housing with 4 M3x10 screws.
This case is a functional prototype, I'll be using an outdoor case myself, so I haven't tested the wall bracket. I'm leaving the case as a work in progress, please leave your impressions, tips or hints for changes that should be made.