Here you can see data collected by my two Raspberry Pi 3 and a Wemos D1 Mini.

Raspberry Pi / D1 Mini – “weather station”
> multi chart
> single charts
> matlab visualization
> system stats

Data is read in 5 minute intervals by a cronjob, then rendered via the thingspeak API.

To measure temperature, humidity and air pressure, I am using a BME280.

My python script on github and the javascript for the multi chart