Pico Mcp

MCP for Raspberry Pi Pico W

LED Control via JSON-RPC

The firmware exposes JSON-RPC tools that can be invoked using the tools/call method. Use tools/list to discover available tools: set_location, set_switch_id, and set_switch. These allow you to configure the target switch and toggle the onboard LED.

Example requests:

{ "jsonrpc": "2.0", "method": "tools/call",
  "params": { "name": "set_location", "arguments": { "location": "office" } },
  "id": 1 }

{ "jsonrpc": "2.0", "method": "tools/call",
  "params": { "name": "set_switch_id", "arguments": { "switch_id": "led" } },
  "id": 2 }

{ "jsonrpc": "2.0", "method": "tools/call",
  "params": { "name": "set_switch", "arguments": { "state": "on" } },
  "id": 3 }

Call set_switch with "state": "on" or "off". The LED changes only when the request's location or switch_id matches the previously set values or when both fields are omitted.

How it works

Use the agent mode of Github copilot Chat in Visual Studio Code.

https://github.com/user-attachments/assets/7c040786-b527-4f8a-829e-545591232b0f

Installing the pico-sdk

The following is an excerpt from a previous setup guide.

1. Create a working directory

``bash mkdir -p ~/.pico-sdk/sdk ``

1. Download the latest release (2.1.1) from the official Raspberry Pi repository

``bash cd ~/.pico-sdk/sdk git clone -b 2.1.1 https://github.com/raspberrypi/pico-sdk.git 2.1.1 cd 2.1.1 git submodule update --init ``

1. Set the PICO_SDK_PATH environment variable

``bash export PICO_SDK_PATH=$HOME/.pico-sdk/sdk/2.1.1 ``

After verifying that the repository was cloned and its submodules were checked out, the pico-sdk will be available under ~/.pico-sdk/sdk/2.1.1.

Build Instructions

The commands below automatically fetch the Pico SDK and build the project.

mkdir build
cd build
cmake -E env PICO_SDK_FETCH_FROM_GIT=1 cmake ..
make -j$(nproc)

When the build succeeds, artifacts such as pico_mcp.uf2 are generated in the build directory.

Source & license

This open-source MCP server is cataloged on AgentStack and links to its original source — we do not rehost the code.

• Author: h7ga40
• Source: h7ga40/pico_mcp
• License: MIT

Install and usage instructions live in the source repository linked above.