arduino-mcp-server

01 · What it does

• Detect connected boards and ports and infer FQBNs
• Install cores, compile sketches and upload, optionally waiting for a ready signal
• Stateful serial sessions: open, read, expect a pattern, write, close
• safety_preflight checks pin voltage and current, battery charge rate and polarity, and ESP32 flash and boot pins
• Board pin and capability reference you can browse and search

02 · Install

$ npm install -g arduino-mcp-server

1. Needs arduino-cli on your PATH, or ask the server to install it (arduino_cli_doctor, install_arduino_cli)
2. ARDUINO_SKETCH_ROOT restricts sketch paths to one folder
3. Not affiliated with this directory: the hardware-mcp GitHub org is a separate project that happens to share the name

03 · Client config (from README)

{
  "mcpServers": {
    "arduino": {
      "command": "npx",
      "args": ["-y", "arduino-mcp-server"],
      "env": {
        "ARDUINO_CLI_PATH": "arduino-cli",
        "ARDUINO_SKETCH_ROOT": "/path/to/your/sketches"
      }
    }
  }
}

Install steps taken from the project README (its recommended path first). Placeholders are the maintainer's. Not bench-tested by HardwareMCP yet.