Some unshipped old Code for Philly efforts in this space that would-be hackers might find some useful scraps in:
-
https://codeforphilly.org/projects/Mobile_pollution_and_heat_island_data_collection_and_mapping
- designed a custom low-cost PCB for sensors
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https://github.com/CodeForPhilly/vehicle-mounted-sensors
- prototyped Arduino+LoRaWAN sensor reporting to a map+time dashboard