How IoTClass Works · 6 of 8

Books

How IoTClass Works · 6 of 8

Three resource types, three different jobs: videos for watching a process happen, hands-on labs for building it yourself, and code references for the moment you're actually writing firmware.

Sammy your guide, not a professor

“I used to treat a finished video as the same thing as understanding. It isn't — the lab afterward is where I actually found out what I'd missed.”

Videos

Short clips — more than 25 lecture highlights and walkthroughs across five categories: architecture, data analytics, security, networking, and sensing — embed directly inside the chapters they support, so you meet them in context instead of hunting a separate gallery. Coverage varies by module: some topics have several clips, others have none yet. Watch with a question already in mind, pause when something changes state, and validate what you saw with the chapter's own quiz afterward.

Hands-On Labs

A lab is only worth the time if it produces evidence — a packet trace, a serial log, a working dashboard — not just a finished screen. Guided labs live inside the modules that teach them: the MQTT module carries full ESP32 publisher, dashboard, and TLS labs, and the Energy & Power module has its own hands-on lab on power budgeting. Run one lab at a time, stop at each checkpoint to verify the actual output before moving on, and keep a short notebook of commands, versions, and anything that didn't work as expected.

Sammy says: a lab that "worked" on the first try without a single confusing step is the one worth double-checking. Usually it means a checkpoint got skipped, not that everything actually lined up.

Code Snippets & Quick Reference

Runnable patterns — sensor reads, MQTT publish/subscribe, deep sleep, and the rest — now live as inline code inside the chapters that teach them, the same way the labs do, rather than in one giant standalone library. If you're mid-project and just need a fast lookup — a port number, a pin assignment, a formula — the relevant chapter is the right place to look; there's no separate catalog to keep in sync with it.