I currently have a Raspberry Pi 3, a hall effect sensor https://grobotronics.com/hall-sensor-board.html
and a magnet attached to a bicycle's wheel. I'd like to make a RPM vs Time chart that shows the gradual decrease of the wheel's speed (in RPM). but I don't know where to start because I'm still a beginner. I would either do this through node-red or make a python script that logs the RPM value every 2 seconds or so and then I could manually make the chart in Excel. Is there anyone who could help me out a bit?