Node-RED Real-Time Sensor Dashboard

I already have temperature, motion, humidity and EC/pH sensors streaming data on my network; what I need now is a clean, responsive Node-RED dashboard that presents those readings in real time. Your job is to build the flow, handle the data parsing, and design a front-end that makes the numbers easy to read on desktop, tablet and phone.

I expect dynamic charts that update without a page reload, large value tiles for at-a-glance status and visual cues (colour changes or icons) whenever a reading crosses a preset threshold. Historical data should be retained so I can scroll back through the past 24 h, and the whole layout must be simple enough for me to tweak later through the Node-RED editor.

If MQTT, HTTP or WebSocket nodes are needed to pull in the sensor payloads, please wire them in and annotate the flow so I know exactly where each sensor enters the pipeline. Any additional npm modules you rely on should be listed in a quick README.

Deliverables:
• Exported, well-commented flow.json (or .flow) ready to import
• Custom CSS or template nodes used for the dashboard look-and-feel
• A brief setup note covering required nodes, ports and credentials

I will run the final solution on a Raspberry Pi 4 with Node-RED v3, so please keep the implementation lightweight and avoid anything that would tax limited hardware.