PM2.5 is a pollution sensor base with affordable price and high performance. Integrated with PMSA003 and SHT20, makes it possible to measure the ambient quality of air, temperature, and humility all at one device.
Much discussion and research have taken place within academic and government environmental organizations as to how accurate such sensors are and whether they have a place in the enforcing of environmental regulation, or even providing an indication of air quality trends to citizens.
With M5Stack product series, the system makes it much easier to deploy the measurement node all around the city and make it possible to build a complete ecosystem from regulation enforcement to citizen indication.
With regards to PMSA003, it is a digital universal particulate concentration sensor designed by using the principle of laser scattering method. It is capable of continuous acquisition and computing the number of suspended particles in per unit volume which is also the particulate concentration distribution. Then turn it into mass concentration and output through digital GPIO.
SHT20 is a Humidity and temperature sensor IC.
PM2.5 Air Quality Kit (PMSA003 + SHT20)
The M5stack with pm2.5 sensor makes the job out of the box. Software support is based on github and the environment visual studio code (not arduino devkit). Information on building such programming environment is too limited. Thus there is no out of the box, easy way to compile and modify the script for example to build a small api.