RP2DAQ board (rp2daq.Rp2daq) — device market

Install

Three ways to run this device. Each one serves its fake backend: no instrument, no simulator install and no upstream checkout.

OpenAI4S (one command)

shell

openai4s lab add labs/filipdominec__rp2daq

Installs the device into the OpenAI4S Lab on its fake backend and starts it. First time? See setup below.

Or, in the workbench, open the Lab tab → Market → Install.

Standalone MHS endpoint

shell

git clone --depth 1 https://github.com/PKU-YuanGroup/OpenMHS.git && cd OpenMHS
PYTHONPATH=MHS/sdk/src python3 -m mhs serve labs/filipdominec__rp2daq --port 7400
# in a second terminal, from the same directory:
PYTHONPATH=MHS/sdk/src python3 -m mhs describe --endpoint http://127.0.0.1:7400

Serves the device as an MHS endpoint on port 7400 from an OpenMHS clone (Python 3.10 or later, standard library only); describe prints what it offers.

Any MCP host (Claude Desktop, Cursor, …)

mcp configuration

{
  "mcpServers": {
    "rp2daq": {
      "command": "python3",
      "args": [
        "-m",
        "mhs",
        "serve",
        "labs/filipdominec__rp2daq",
        "--mcp"
      ],
      "env": {
        "PYTHONPATH": "/path/to/OpenMHS/MHS/sdk/src"
      }
    }
  }
}

Add this server to the host's MCP configuration and replace /path/to/OpenMHS with the path of your OpenMHS clone. The host starts the server and talks to it on stdin and stdout.

What it does

Measures

adc_mean
stepper_position
stepper_moving

Adjusts

gpio_pin
gpio_level

Actions

adc_sample: Capture one ADC block and return the mean raw count
pwm_set: Configure a PWM slice and set the duty value of one GPIO
stepper_init: Initialize one A4988-compatible stepper on two GPIO pins
stepper_move: Move one initialized stepper to an absolute or relative nanostep position
drive_safe_state: Stop every initialized stepper at its current position, zero PWM and drive configured GPIO outputs low

Names as the driver declares them. Units, limits and the safety declaration are in the package's REFERENCE.md.

First-time setup

The OpenAI4S workbench with the OpenMHS lab, from a source checkout:

shell

# OpenAI4S workbench with the OpenMHS lab (source checkout)
git clone --recursive https://github.com/PKU-YuanGroup/OpenAI4S.git
cd OpenAI4S && ./setup.sh && source .venv/bin/activate
openai4s lab add labs/filipdominec__rp2daq
openai4s serve        # open the Lab tab

The standalone endpoint and the MCP server need only an OpenMHS clone and Python 3.10 or later. More in the market's getting-started guide and on the OpenAI4S host page.

Source and evidence

Upstream: filipdominec/rp2daq
Pinned commit: 7744f34811d1
Licence: MIT
Stars: 41
Evidence: contract_checked on the fake backend
Backends: fake, hardware

The driver package MHS/drivers/labs/filipdominec__rp2daq wraps the upstream code at the pinned commit. Its REFERENCE.md documents the full contract: every value, action, unit, limit and the safety declaration.