On: Air Quality Monitors from USD $169 to $6k use the same low-cost PM Modules

[CodesInChaos]

https://github.com/airgradienthq/arduino/blob/master/example...

The current version of the file mentioned in that thread says CC-BY-SA https://github.com/airgradienthq/arduino/blob/master/example...

(Though I don't understand why anybody would use CC-BY-SA for code, instead of a copyleft license designed for code)