🖥️ Track 09 · HMI & Connectivity0%
🖥️ The Suspiciously Fun PLC Series · Track 09

HMI & connectivity:
let the world in.

A PLC that nobody can see or talk to is just a box of blinking lights. This track covers the windows and doors: the operator's HMI screen, how controls bind to variables, and the three ways the outside world reaches in (ADS, OPC UA and MQTT). All three carry the same data, each to a different audience.

The human view

🖥️ the operator panel · 🔔 polling vs subscription: how a screen stays in sync.

The machine view

📡 ADS (Beckhoff's own) · 🌐 OPC UA (the standard) · ☁️ MQTT (to the cloud).

Everything here just reads & writes the variables you've built across Tracks 01–08.