4 ms·
Probably want to add a PM (particulate matter) sensor to the mix. I've built a few similar devices using ESP chips and various laser dust sensors, highly recom
by zensavona 8y ago
Probably want to add a PM (particulate matter) sensor to the mix.
I've built a few similar devices using ESP chips and various laser dust sensors, highly recommend the Plantower PMS5003 - laser defraction, PM1-PM10 accuracy, ~$20 and there are good libraries available on GitHub for interacting with it.
Edit: https://twitter.com/zensavona/status/1091949965306257409 https://twitter.com/zensavona/status/1091949965306257409
- luma 8y agoI'm using a very similar stack! I've built 20 devices using the PMS5003, Spec Sensors O3 digital gas sensor, and a cheap GPS module connected to an ESP32. 6 have been mounted in the field (more coming soon!). They report sensor readings via LoRaWAN to a public-facing dashboard visible here: https://graqm.org https://graqm.org Devices being tested at an EPA air quality monitoring station: https://imgur.com/a/joQvj https://imgur.com/a/joQvj Desktop version: https://imgur.com/a/yT1IK https://imgur.com/a/yT1IK