Elevator Mimic Panel

A wall-mounted panel mirroring elevator controller state with indicator lamps and a seven-segment floor display.

Background

Security staff had no way to see elevator state from the lobby desk.

Controller signals were only available inside the machine room.

An STM32 board polls the controller over Modbus RTU on RS-485 and drives the panel display, with a watchdog and fail-safe indication on link loss.

Electrical noise in the machine room required opto-isolation and shielded cabling.

In the field, EMC problems look exactly like software bugs — measure before you debug.

Real-time monitoring and fault alerting platform for 60+ elevator units across multiple buildings.

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