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Arduino MCP server for CLI setup, board detection, compile/upload, serial monitoring, and pin refs.
About
Arduino MCP server for CLI setup, board detection, compile/upload, serial monitoring, and pin refs.
Security Report
7.0
Moderate7.0Low RiskValid MCP server (2 strong, 3 medium validity signals). 3 known CVEs in dependencies (0 critical, 3 high severity) Package registry verified. Imported from the Official MCP Registry.
3 files analyzed · 4 issues found
Security scores are indicators to help you make informed decisions, not guarantees. Always review permissions before connecting any MCP server.
Permissions Required
This plugin requests these system permissions. Most are normal for its category.
What You'll Need
Set these up before or after installing:
Optional path to arduino-cli binary. Defaults to arduino-cli on PATH.
Environment variable: ARDUINO_CLI_PATH
Optional absolute path restricting sketch operations to this directory.
Environment variable: ARDUINO_SKETCH_ROOT
How to Install
Add this to your MCP configuration file:
{
"mcpServers": {
"io-github-hardware-mcp-arduino-mcp-server": {
"env": {
"ARDUINO_CLI_PATH": "your-arduino-cli-path-here",
"ARDUINO_SKETCH_ROOT": "your-arduino-sketch-root-here"
},
"args": [
"-y",
"arduino-mcp-server"
],
"command": "npx"
}
}
}Documentation
View on GitHubFrom the project's GitHub README.
arduino-mcp-server
Give your AI assistant full control over Arduino — compile, upload, monitor serial, and verify wiring safety, all through natural language.
Part of the HardwareMCP ecosystem — open-source MCP servers that bridge AI to physical hardware.
What this does
AI assistants can control Jira, GitHub, and databases. They can't talk to a microcontroller — until now.
arduino-mcp-server wraps arduino-cli into an MCP server so your AI can:
- Detect connected boards and ports automatically
- Compile and upload sketches without touching the terminal
- Monitor serial output with stateful sessions (open, read, expect, write, close)
- Run electrical safety checks before sending commands to hardware
- Manage dependencies — cores, libraries, and CLI installation
Quick Start
Install:
npm install -g arduino-mcp-server
Add to Claude Desktop (claude_desktop_config.json):
{
"mcpServers": {
"arduino": {
"command": "npx",
"args": ["-y", "arduino-mcp-server"],
"env": {
"ARDUINO_CLI_PATH": "arduino-cli",
"ARDUINO_SKETCH_ROOT": "/path/to/your/sketches"
}
}
}
}
Requires arduino-cli on your PATH, or let the server install it for you.
What you can say
Bootstrap from scratch:
"Check if Arduino CLI is installed and set everything up for an Arduino Uno."
Compile and upload:
"Compile my Blink sketch and upload it to the Uno on COM6."
Serial monitoring:
"Open serial on COM6 at 115200 and wait until the device prints READY."
Safety-first workflows:
"Run a safety preflight for an Arduino Uno with 5V on pin 13 at 25mA before I send commands."
Tools
| Tool | What it does |
|---|---|
arduino_cli_doctor | Check Arduino CLI installation and version |
install_arduino_cli | Guide through arduino-cli installation |
detect_hardware | Detect connected boards and infer FQBNs |
list_connected_boards | List all connected Arduino boards |
list_serial_ports | List available serial ports |
ensure_core_installed | Check/install board cores |
compile_sketch | Compile a sketch for a target board |
upload_sketch | Upload compiled sketch to a board |
upload_and_wait_ready | Upload and wait for device ready signal |
serial_open_session | Open a stateful serial session |
serial_read | Read buffered serial data |
serial_expect | Wait for a pattern in serial output |
serial_write | Send data over serial |
serial_close_session | Close a serial session |
serial_list_sessions | List active serial sessions |
read_serial_snapshot | Quick one-shot serial read |
safety_preflight | Electrical safety check before hardware ops |
get_board_details | Get pin/capability details for a board |
list_supported_boards | List all boards arduino-cli supports |
list_board_reference | Browse board pin reference |
search_board_reference | Search board reference by keyword |
Resources:
arduino://boards/reference— structured board pin/capability reference
Prompts:
arduino-cli-bootstrap-policy— policy for arduino-cli setup behaviorarduino-setup-assistant— guided Arduino environment setup
Configuration
| Variable | Default | Description |
|---|---|---|
ARDUINO_CLI_PATH | arduino-cli | Path to arduino-cli binary |
ARDUINO_SKETCH_ROOT | (none) | Restrict sketch paths to this directory |
Development
git clone https://github.com/hardware-mcp/arduino-mcp-server
cd arduino-mcp-server
npm install
npm run typecheck
npm run build
npm run dev
Part of HardwareMCP
This server is part of the HardwareMCP ecosystem — a collection of MCP servers that give AI assistants real control over physical hardware.
License
MIT — see LICENSE.
Support
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