Ryan Malloy
ff12b9450f
Native library calls during startup interfered with FastMCP's stdio transport initialization. Library is now loaded lazily on first tool call instead.
CP210x MCP Server
MCP server for customizing Silicon Labs CP210x USB-UART bridge devices. Allows reading and writing USB descriptor strings, power configuration, and more.
Features
- List connected CP210x devices
- Read/write USB product string (device name)
- Read/write manufacturer string
- Read/write serial number
- Configure max power draw
- Set self-powered/bus-powered mode
- Reset device (USB re-enumeration)
- Lock device (permanent - prevents further changes)
Requirements
- Linux x86_64
libcp210xmanufacturing.so- Install via AUR package or build from source
Installation
Install the library (Arch Linux)
cd aur/cp210xmanufacturing
makepkg -si
Or build from source:
cd AN721SW/Linux/LibrarySourcePackages/cp210xmanufacturing
make LIB_ARCH=64
sudo make install
sudo ldconfig
Install the MCP server
# With uv (recommended)
uv tool install .
# Or with pip
pip install .
Usage
Add to Claude Code
claude mcp add cp210x -- uvx cp210x-mcp
Available Tools
| Tool | Description |
|---|---|
list_devices |
List connected CP210x devices |
get_device_info |
Get detailed device information |
set_product_string |
Set USB product string (device name) |
set_manufacturer_string |
Set USB manufacturer string |
set_serial_number |
Set USB serial number |
set_max_power |
Set max USB power draw (mA) |
set_self_powered |
Set self-powered vs bus-powered |
reset_device |
Reset device (USB re-enumeration) |
lock_device |
PERMANENTLY lock device config |
Example
# In Claude Code conversation:
> What CP210x devices are connected?
> Change the product name of device 0 to "My Custom Device"
Relationship to mcserial
This MCP server complements mcserial which handles serial port communication. Use this server for device customization (changing USB descriptors) and mcserial for serial communication (sending/receiving data over UART).
License
MIT