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E-ink local air quality meter

Home device for monitoring local air quality; uses same sensors as PurpleAir device

AKAAKA
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I built this device for someone to use in their home in California, where seasonal wildfires and other allergens are a frequent concern, and where microclimates make local sensing uncommonly useful.
It's a RasPi Zero W that talks over i2c to a Teensy that interfaces with two identical air quality sensors, Honeywell units that are also visible in the PurpleAir hardware that I was trying to best.
The eink display shows a timeseries graph of the last ~3 hours of local data, along with forecast information for the region as supplied by the Open Weather API.

How disappointing - this site used to have an easy-to-fill out BOM and repo area, but that's gone. I guess I'll document this on my own website instead.

JPEG Image - 3.28 MB - 06/07/2021 at 22:01

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JPEG Image - 2.88 MB - 06/07/2021 at 22:01

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