This DIY enclosure for AirGradient Basic DIY indoor air quality monitor was inspired by my Ecobee thermostat. It features a baffle to separate the PM sensor fan intake and exhaust and it features a separate enclosure to isolate the temperature sensor from the heat generating electronics. There are two different face plate designs, plain and ‘fancy’. There is also a mounting adapter that can be used with 3M command strips to hang the enclosure without screws. Use 4 each M2 x 4mm heat set inserts for the board and an M3 x 4mm long heat set insert for the sensor locations.

I generally followed the instructions and self-sourced the components as described in the AirGradient Basic DIY instructions located here: https://www.airgradient.com/documentation/diy/

Notes:

Just in case I needed to swap the Wemos D1 Mini in the future, I deviated from the AirGradient DIY instructions by mounting the Wemos to a header soldered to the AirGradient Board. This raises the oled screen up higher than ‘normal’ by the height of the header, which is accommodated by this enclosure. This installation method unfortunately makes the Wemos a very unstable platform for plugging and unplugging power. I zip tied it down to keep it from moving.

The separate side enclosure for the temperature sensor doesn't work as well as I had hoped. The temperature still seems to read high by a few degrees due the the nearby electronics generating heat.

I had some trouble with the heat set inserts not lining up with the AG board holes despite using the exact measurements of the board from the AirGradient files. I think this is due to the 3D print shrinking. I just pushed the inserts out a little when installing. You may be able to adjust for this by printing it a little larger to compensate.

I printed out the command strip adapter in two mirrored halves so it didn't need supports. Seems to work fine that way.

The fancy faceplate is inspired by the LePotato case lid found here: https://www.printables.com/model/406587-libre-computer-aml-s905x-cc-le-potato-case-lid0

The design was created with Onshape. Should you wish to modify it you can either use the attached step files, or you can find the original CAD models here: https://cad.onshape.com/documents/06122a530881d632f28dff64/w/7e9adb6b18455a884ff6900c/e/49ca1881b2c03d642776e946?renderMode=0&uiState=67d5b13f3a2bef3a30ea20c4