@rosepetal/node-red-dashboard-2-system-monitor

System monitor widget for Node-RED Dashboard 2 (Linux-focused, NVIDIA GPU support).

What it shows

• CPU: per-core usage bars, average usage, tasks, threads, load average, uptime.
• Memory: RAM and swap usage bars with used/total values.
• Disk: mountpoint, filesystem, usage bar, used/total bytes, read/s, write/s.
• Network: interface state, link capacity, down/s, up/s, RX total, TX total.
• GPU (NVIDIA): utilization, VRAM usage, temperature, power, fan, p-state, GPU process VRAM.
• Processes: htop-style table with PID, user, VIRT, RES, SHR, CPU, state type, command.

Design goals

• Display-only widget (no inputs/outputs).
• Non-blocking sampling with async reads.
• Delta-based rates for CPU, disk, network, and process CPU.
• Process table is filtered to the union of top 50 processes by VIRT, RES, SHR, and CPU for efficiency.

Requirements

• Node.js (same version supported by your Node-RED runtime)
• Node-RED >= 1.0.0
• Node-RED Dashboard 2 (@flowfuse/node-red-dashboard)
• Linux with /proc and /sys/class/net
• Optional for GPU: nvidia-smi available in PATH

Install

npm install @rosepetal/node-red-dashboard-2-system-monitor

Or install from the Node-RED Palette Manager using the same package name.

Node configuration

The widget appears as system-monitor in the dashboard category.

Config fields:

• Group: Dashboard 2 group where the widget is rendered.
• Size: standard Dashboard 2 widget size.
• Update interval (ms): refresh period (minimum effective value is 250 ms, default 1000 ms).

Notes

• GPU section is auto-disabled when NVIDIA tooling is not available.
• Network interface filtering ignores typical virtual/internal interfaces (loopback, docker, veth, etc.).
• Disk section excludes pseudo filesystems.

Development

npm install
npm run build
npm run dev

License

Apache-2.0