See my blog post: Air Pollution Tracking with Node.js, Elastic Stack, and MQTT
As for me, I just wanted to see measurements in my environment because public government data lists only major cities and reports they provide typically have maps with low resolution. So I decided to start a little IoT DIY project with off-the-shelf components to measure the air pollution with a particular matter/dust sensor, tracking the PM10, PM2.5, as well as the PM2.5/PM10 ratio values. I wanted to be able to do this with a mobile device and measure in various locations where I work and live. My office is close to the main street and close to an industrial area, but I recently moved into a new house in a rural town that feels like a “climatic spa” and actually has a health resort. To make it easy for others to put together Internet of Things systems like the one described here I created “Air Pollution Tracker”, so anyone can collect data at their locations, experiment with the setup, and share their data.
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