This project is now in its third generation, having evolved from an intial form that used an older Plantower PM2.5 air quality sensor](https://www.adafruit.com ...

Note for the web site: the purpose of "sqlconnect-example.php" is to maintain privacy of the database access credentials; it should be copied to the web server, renamed to "sqlconnect.php", and then ...

Abstract: In recent years, air quality and environmental protection are getting more and more concern in public, much people are pay attention to air quality of their surroundings. As one of air ...

According to [Dr. Tom Lehrer’s] song Pollution, “Wear a gas mask and a veil. Then you can breathe, long as you don’t inhale!” While the air quality in most of the world hasn’t gotten that bad, there ...