Before you begin logging your fume extractor data, you need to do some setup in Adafruit IO.
First, check out this Learn guide if you've never used Adafruit IO before to see how to get started.
For this project you'll need two feeds: fumes and fan-speed.
On your dashboard page, click on the cog wheel on the right-hand side of the screen. Then click + Create New Block.
Repeat this process for the fan-speed feed. Afterwards, you should have two line chart blocks on your dashboard for both feeds.