All work
Industrial operations · Embedded display control
MQTT-Controlled Industrial LED Displays
Outdoor LED matrix signs driven over MQTT to guide vehicles and operators on site.
Operational· pending verificationPublic summary — client anonymised
Publication draft: status, contribution and technical details require contributor approval. The architecture and implementation notes below are illustrative, not verified accounts of a client deployment.
Context & challenge
Drivers need clear, immediate instructions at operational points — driven by system state, not by a person with a radio.
Objectives
- Display instructions from operational events
- Recover cleanly after power or network loss
Solution approach
- MQTT command topics per sign with retained state
- Message templates mapped from operational events
Architecture
- Operational event
- Rules
- MQTT
- Sign controller
- LED matrix
Simplified and anonymised. No private infrastructure details are published.
Important technical decisions
- Retained messages so a rebooted sign shows the correct state immediately
Operational considerations
- Sunlight readability
- Controller reboot
- Network segmentation on site
Results
Results pending verification. We only publish outcomes that have been confirmed.
Lessons learned
- Physical outputs need a safe default state when the network is gone.