You have a Raspberry Pi Pico W. You have a temperature sensor wired to it. And you have a question that most tutorials never actually answer: once you have that data, what do you do with it?
A local Flask server, an HTML interface in Chromium, file upload, AI processing, and results rendered as a table. All of it running on a Raspberry Pi 3B+. Here is what we built.
Parts 1 and 2 lived in the terminal. Part 3 gets a proper window — file picker, results display, save button — built with Tkinter, which ships with Python on every Raspberry Pi OS install. Zero additional dependencies.
Part 1 used bash and curl. It worked. Part 2 uses Python — and the code gets cleaner, the error handling gets real, and the output lands in a file you can actually use.