I found a very interesting article at heise.de ( https://www.heise.de/ratgeber/Aerosol-Ampel-bauen-ESP8266-warnt-vor-Aerosolen-Feinstaub-und-Gestank-5021456.html ) and on GIT ( https://github.com/pinae/AeVOC )

I really like electronics and 3D-Printig. But i don't like working with wood. So I designed a case for this.

I used PLA but my PLA is very brittle so my closure broke at the second attempt :-( (You can see it on he pictures)

On the backside (i know, that the edges are not nice. 0,3 mm was no good choice):

• one hole for the powersupply
• one square hole for the DHT22 so it can measure outside of the case ( https://www.amazon.de/gp/product/B06XF4TNT9/ref=ppx_yo_dt_b_asin_title_o08_s00?ie=UTF8&psc=1 )
• many holes for airflow

On the front:

• square hole for the OLED
• square hole for the 8x8 LED Grid ( https://www.amazon.de/gp/product/B078HYP681/ref=ppx_yo_dt_b_asin_title_o08_s00?ie=UTF8&psc=1 )

On the left

• one hole for the USB so you can flash the ESP8266 without opening the case

Inside:

• small chamber for the SDS011. I use its small Airflow to cool down the LED Grid ( https://www.amazon.de/gp/product/B07911ZY9W/ref=ppx_yo_dt_b_asin_title_o07_s00?ie=UTF8&psc=1 )
• place for a Buck-VCC-Controller ( https://www.amazon.de/gp/product/B07YWLCTLK/ref=ppx_yo_dt_b_asin_title_o09_s00?ie=UTF8&psc=1 )
• place for the ESP8266 ( https://www.amazon.de/gp/product/B06Y1ZPNMS/ref=ppx_yo_dt_b_asin_title_o09_s00?ie=UTF8&psc=1 )
• place for the CCS811