Dcp

Abstract

1. Introduction

A reference Bridge translates DCP ↔ MCP, so any MCP-compatible LLM works out of the box. DCP is the last mile to physical hardware.

hallucinated or adversarial calls are stopped before any byte reaches a device. DCP catches all six categories at the wire layer; the others catch what their existing schema happens to cover.

MCP is excellent for SaaS tools, but assumes JSON-RPC over WebSocket and runtime tool discovery. On an MCU with 32 KB of RAM, that's a non-starter.

2. Objective

Device Context Protocol — bridge LLM agents to physical devices. Sub-50-byte frames, 27.6KB flash / 0.6KB RAM measured on ESP32, capability-scoped and safe by design. Complementary to MCP. Paper: arXiv:2605.26159

This project demonstrates how Python, Arduino, ESP32 can be applied to a real-world Internet of Things (IoT) problem.

4. Technology Stack

• 13/13 round-trip tests pass on each board (tools/test_uart_roundtrip.py)
• 88/88 Python unit & conformance tests pass
• Full lamp firmware: 295 KB flash, 22.7 KB globals on WROOM-32 — most
• The DCP layer itself measures 27.6 KB of flash and 0.6 KB of RAM
• The S3 run also exercises DCP over a native-USB CDC link rather

5. System Requirements

General requirements for this technology stack — check the README for exact versions.

• Python 3.8 or later
• pip / virtualenv for dependencies
• VS Code, PyCharm or Jupyter Notebook
• Git (to clone the repository)

6. Installation & Setup

git clone https://github.com/device-context-protocol/dcp.git
cd dcp

# As a user — install from PyPI:
pip install "pydcp[mcp,serial]"            # or [mcp,serial,mqtt,ble] for all transports
dcp inspect examples/lamp_manifest.yaml    # parsed manifest summary
dcp serve   examples/lamp_manifest.yaml --simulator

# As a contributor — editable install from source:
git clone https://github.com/device-context-protocol/dcp.git
cd dcp
pip install -e ".[mcp,serial,mqtt,ble,dev]"
pytest                                     # all 88 tests
python examples/lamp_demo.py               # in-process bridge ↔ fake lamp

Full setup instructions are in the project README.

7. Future Enhancements

Suggested extensions you can add to make this your own project.

• Add a mobile dashboard using Blynk or Firebase
• Store readings in a cloud database for history charts
• Add alerts via SMS / Telegram when thresholds are crossed

8. Viva / Review Questions

Common questions examiners ask for projects in this domain.

1. Which microcontroller / board and sensors are used and why?
2. How does the device send data (Wi-Fi, MQTT, HTTP, Bluetooth)?
3. Where is the sensor data stored and visualised?
4. How is power consumption managed?
5. How would you secure the device and its communication?

9. Source Code & License

This project is developed by device-context-protocol and published on GitHub under the MIT License. Please follow the license terms and credit the original author when you use or modify this code.