This is the workshop. The other parts of the site tell you what to measure and why; this is where you actually build the thing — the code that runs on a cheap sensor, and the standard ways to get its reading to a place you own. None of it is exotic. A few dollars of parts, an afternoon, and a pattern you can repeat.
What's here.
- Connectivity — how a reading gets from a sensor to an endpoint that keeps it, and the honest options for doing it: a tiny chip pushing straight to the cloud, a Home Assistant hub, and more. Start here.
- The Sketch Library — the actual code (sketches) for common sensors, with parts, wiring, and the push method. Filling in over time.
The Collect layer.
This section is the engineering side of Collect·Have·Use, turned into things you can copy and flash. Collecting is the commodity part — cheap, capable, and getting cheaper — which is exactly why a grower can do it without a vendor. The appropriate rule applies here too: build the smallest thing that gets the reading you need to a place you own. The value is in what you do with the reading later; the job here is just to get it flowing, cheaply and reliably.
Where to start.
If you are new to this, read Connectivity first — it frames the whole picture and helps you pick the path that fits before you buy a part. If you already know your path and just want the code, head to the Sketch Library. And if you are not sure a build is even for you, the Monitoring stack lays out the buy-versus-build choice without any wiring.