Replacing $5,000 of industrial equipment with a browser tab

Why Your Next Industrial HMI Should Just Be a Browser Tab A standard industrial signal tower setup can cost around $15,000 once you factor in the HMI panel, the physical tower, and the proprietary software licenses that tie them together. I rebuilt that same functionality in a browser tab. The demo runs on your phone’s flashlight to prove the concept. The same Web Serial and WebUSB APIs that control a smartphone torch can also control real PLCs, relay boards, and industrial signal towers. The $15,000 Problem: Vendor Lock-in Industrial Human-Machine Interface (HMI) panels are expensive for reasons that have little to do with hardware. When you buy one, you are not just buying a screen. You are paying for: Proprietary OS: A black box that no one else supports Walled garden: A vendor-specific programming environment License fatigue: Fees per seat, per version, per upgrade The downtime trap: A 6-8 week lead time when a screen breaks And the screen always breaks. When it does, production st