Ryan Malloy
acec4b29ba
Write tools now prompt the user via MCP elicitation before modifying OTP EPROM. Falls back to no confirmation if the client doesn't support elicitation. lock_device always requires confirmation — refuses without it. New tool: setup_udev_rule - Auto-generates symlink name from product string - Installs rule to /usr/lib/udev/rules.d/ - Elicits user permission before sudo operations
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