There was a similar post on HN about four months ago describing an air quality monitor with a slightly different stack:
Build an Air Quality Monitor with InfluxDB, Grafana and Docker on a Raspberry Pi https://news.ycombinator.com/item?id=19506983
Build an Air Quality Monitor with InfluxDB, Grafana and Docker on a Raspberry Pi https://news.ycombinator.com/item?id=19506983
This particular article & comments read like a collection of referral links to Taobao and Ali-Express.