Raspberry Pi Tunnel Dimming

This Raspberry Pi CM4-based tunnel intelligent dimming solution carries on-board edge computing power, enabling stable autonomous operation without cloud dependency — suitable for highway tunnels of all lengths, municipal mountain-crossing tunnels, and various traffic scenarios. The system integrates multi-type sensors for ambient light, traffic flow, outdoor temperature/humidity, and fog density to precisely capture entrance/exit brightness落差, traffic density, and weather changes, then fully automatically adapts luminaire brightness and color temperature parameters — solving the traffic safety hazards of visual glare and dark adaptation at tunnel entrances and exits. Paired with open-source visualization management software, operators can centrally monitor all luminaire operating status, switch circuits, and power loads from a PC or tablet, with independent control for substations, vehicle lanes, and pedestrian walkways, plus automatic fault pop-up alerts. Combining the advantages of localized operational stability, affordable deployment costs, and flexible commissioning, this solution has been proven reliable and deployed in multiple highway tunnel projects nationwide — safeguarding traffic safety while delivering long-term reductions in tunnel lighting electricity costs.