Draft for review. Columns are devices and their tracks, rows are knowledge areas. Every box holds one or more paths, and a path is an ordered set of courses. The colour is the path's status, the badges are the hardware it uses. Click a path to see its courses and support; the paths it builds on get a dashed outline.
Every path builds on the learner's machine with ter-cli. Coming for all of them: coding in the browser, sim86 (which boards it covers is to be decided) and remote boards (onMCU, µFerris bench). Click a path for its full detail.
In purple: the content exists in the book, the blog or learn-stm32f4-rs and only needs turning into courses.