Motion Sensing CO2 Monitor Case
thingiverse
I wanted to monitor the CO2 levels in my house because I have persistent headaches. Thanks muchly to the Tasmota project for letting me just slap a MH-Z19 on an ESP- WROOM32 and get up and running in a hurry. Feature creep kicked in and I then added a 0.96" OLED display so I wouldn't have to check the website, and a HC-SR501 motion sensor to turn the display off. The back may not fit quite right, since it didn't when I printed it. I modified the design to make the back smaller but it may not fit still, since I didn't test it, but worst case you can cut a small slit in one of the corners to make it fit. * ESP-WROOM32 "development board" $7 * MH-Z19 CO2 sensor (I used the "C" variant, but "B" works just as well) $19 * SSD1306 0.96" OLED display $6 * HC-SR501 motion sensor $2 * 4x M3x10 bolts for ESP32 (8mm length would be better, be careful tightening them down to not get the buttons pressed by them) * 4x M2x4 bolts for the OLED (3mm length would be better, do those exist?) * 2x M2x4 bolts for the motion sensor
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