I'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 h

I'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