I made the below graph by manually setting the height of 125 very thin rectangle shapes based on the formula $bi(level, r#m)$ where I changed # for each one by 20 minutes. The result is a relatively smooth-looking graph but the cost is a ton of work.

My idea would be for a graphing module to be added to KLWP where you can make temperature/battery/etc. graphs with a customizable interval and range.

Thanks for your time!