echonetlite-mcp

An MCP (Model Context Protocol) server for ECHONETLite home automation — control air conditioners and read sensors via the Model Context Protocol.

ECHONETLite is a Japanese IoT protocol widely used in smart home devices, particularly HVAC systems by major manufacturers like Daikin, Panasonic, Mitsubishi Electric, and Toshiba.

Features

🌡️ Real-time HVAC monitoring — temperature, humidity, operating status
❄️ Full climate control — mode, fan speed, airflow direction, swing
🔍 Network device discovery — find ECHONETLite devices via multicast UDP
⚡ Real-time notifications — async updates from device multicast listeners
📖 MRA enrichment — Machine Readable Index integration for property names, descriptions, and value decoding
🔬 EPC introspection — query property maps (STATMAP/SETMAP/GETMAP) with MRA-based names
🏷️ Human-readable values — raw EPC values decoded to human-friendly format using MRA definitions
🎯 Multi-EPC queries — query multiple EPC codes in a single request
🔧 Generic EOJ support — query any ECHONETLite object by group/class/instance codes
📦 TypeScript-first — full type definitions included
🔌 MCP compatible — works with any MCP client (Claude Desktop, LM Studio, VS Code extensions, etc.)

Prerequisites

Node.js 18+
An ECHONETLite-compatible device on the same local network

Installation

npm install echonetlite-mcp

Or use it as an MCP server directly:

git clone https://github.com/scottyphillips/echonetlite-mcp.git
cd echonetlite-mcp
npm install
npm run build

Configuration

The server defaults to communicating with a device at 192.168.1.6 on UDP port 3610, using multicast address 224.0.23.0:3610 for discovery and notifications.

Setting the Default Device IP

Option A: Environment variable (recommended)

# Windows CMD
set ECHONET_DEFAULT_HOST=192.168.1.10 && node dist/index.js

# PowerShell
$env:ECHONET_DEFAULT_HOST="192.168.1.10"; node dist/index.js

# Linux/macOS
ECHONET_DEFAULT_HOST=192.168.1.10 node dist/index.js

Option B: Edit config.ts

export const DEFAULT_HOST = '192.168.1.10';  // Change to your device IP

Per-Tool Override

Every tool accepts an optional host parameter to override the default for that specific call:

{ "name": "get_device_status", "arguments": { "host": "192.168.1.20" } }

Running the Server

# Build first
npm run build

# Run (stdio transport)
node dist/index.js

The server communicates via stdio, making it compatible with any MCP client.

Integration with AI Clients

Claude Desktop

Add to your Claude Desktop MCP configuration (claude_desktop_config.json):

{
  "mcpServers": {
    "echonetlite": {
      "command": "node",
      "args": ["/path/to/echonetlite-mcp/dist/index.js"],
      "env": {
        "ECHONET_DEFAULT_HOST": "192.168.1.6"
      }
    }
  }
}

LM Studio

LM Studio supports MCP servers via stdio transport. Create or edit the MCP config file:

Windows: %APPDATA%\lm-studio\mcp_config.json
macOS/Linux: ~/.config/lm-studio/mcp_config.json

{
  "mcpServers": {
    "echonetlite-mcp": {
      "command": "node",
      "args": ["C:\\path\\to\\echonetlite-mcp\\dist\\index.js"],
      "env": {
        "ECHONET_DEFAULT_HOST": "192.168.1.6"
      }
    }
  }
}

VS Code MCP Extension

Configure in your VS Code MCP extension settings:

{
  "mcp.servers": [
    {
      "name": "echonetlite",
      "command": "node",
      "args": ["/path/to/echonetlite-mcp/dist/index.js"],
      "env": {
        "ECHONET_DEFAULT_HOST": "192.168.1.6"
      }
    }
  ]
}

Available Tools

Device Discovery

| Tool | Description | Parameters | |------|-------------|------------| | discover_devices | Discover all ECHONETLite devices on the local network | timeout (optional) - Discovery timeout in ms (default: 3000) |

HVAC Control

| Tool | Description | Parameters | |------|-------------|------------| | get_device_status | Get full status of the HVAC device | host (optional) - IP address | | set_operation | Turn HVAC ON or OFF | host, operation ("on" / "off") | | set_operating_mode | Set operating mode | host, mode ("auto" / "cool" / "heat" / "dry" / "fan_only") | | set_temperature | Set target temperature | host, temperature (0-50°C) | | set_fan_speed | Set air flow rate | host, speed ("auto" / "level1"-"level8") | | set_airflow_vertical | Set vertical vane position | host, position ("upper" / "upper-central" / "central" / "lower-central" / "lower") | | set_airflow_horizontal | Set horizontal vane position | host, position (28 positions: rc-right, left-lc, lc-center-rc, ...) | | set_swing_mode | Set swing mode function | host, mode ("not-used" / "vert" / "horiz" / "vert-horiz") | | set_auto_direction | Set automatic direction mode | host, mode ("auto" / "non-auto" / "auto-vert" / "auto-horiz") | | set_silent_mode | Set silent operation mode | host, mode ("normal" / "high-speed" / "silent") | | set_power_saving | Set power-saving mode | host, state ("saving" / "normal") |

Sensor Readings

| Tool | Description | Parameters | |------|-------------|------------| | get_temperatures | Get room + outdoor temperatures | host (optional) - IP address | | get_humidity | Get room humidity | host (optional) - IP address |

EPC Introspection & MRA Lookup

| Tool | Description | Parameters | |------|-------------|------------| | get_property_maps | Query STATMAP/SETMAP/GETMAP with MRA-based property names and descriptions | host, eojgc, eojcc, eojInstance (all optional) | | query_epc | Query one or more EPC codes from device, returns raw + human-readable decoded values | epcs (required), host, eojgc, eojcc, eojInstance (all optional) | | get_epc_definition | Get MRA definition for EPC codes without querying the device — includes enum values, bitmaps, level ranges | epcs (required), host, eojgc, eojcc, eojInstance (all optional) |

Device Configuration

| Tool | Description | Parameters | |------|-------------|------------| | set_swing_mode | Set air swing/swing mode function | host, mode ("not-used" / "vert" / "horiz" / "vert-horiz") | | set_auto_direction | Set automatic airflow direction mode | host, mode ("auto" / "non-auto" / "auto-vert" / "auto-horiz") | | set_silent_mode | Set silent operation mode | host, mode ("normal" / "high-speed" / "silent") | | set_power_saving | Set power-saving mode | host, state ("saving" / "normal") |

Available Resources

| Resource URI | Description | |-------------|-------------| | device://status | Current HVAC status (updated via async notifications from multicast listener) | | device://capabilities | Device property map (GETMAP, SETMAP, NTFMAP) |

EPC Reference Table

| EPC | Property | Access | Values | |-----|----------|--------|--------| | 0x80 | Operation status | Set/Get | 0x30=ON, 0x31=OFF | | 0x8F | Power-saving operation | Set/Get | Saving/Normal | | 0xA0 | Air flow rate (fan speed) | Set/Get | Auto=0x41, Levels=0x31-0x38 | | 0xA1 | Automatic airflow direction | Set/Get | Auto/Non-auto/Auto-vert/Auto-horiz | | 0xA3 | Air swing mode | Set/Get | Not-used/Vert/Horiz/Vert-horiz | | 0xA4 | Airflow direction (vertical) | Set/Get | Upper/Upper-central/Central/Lower-central/Lower | | 0xA5 | Airflow direction (horizontal) | Set/Get | 28 positions (rc-right, left-lc, center, etc.) | | 0xB0 | Operation mode | Set/Get | Auto=0x41, Cool=0x42, Heat=0x43, Dry=0x44, Fan-only=0x45 | | 0xB1 | Automatic temperature control | Set/Get | — | | 0xB2 | Normal/High-speed/Silent operation | Set/Get | — | | 0xB3 | Set temperature | Set/Get | 0-50°C (signed int) | | 0xB4 | Set humidity in dehumidifying mode | Set/Get | — | | 0xBA | Room relative humidity | Get | Percentage | | 0xBB | Room temperature | Get | -127 to 125°C (signed int) | | 0xBE | Outdoor air temperature | Get | Signed int | | 0xC0 | Ventilation function | Set/Get | — | | 0xC1 | Humidifier function | Set/Get | — | | 0xCC | Special function setting | Set/Get | Clothes dryer, Mite/mold control, etc. | | 0xCF | Air purification mode | Set/Get | — | | 0x9D | STATMAP (access capability) | Get | Property access map | | 0x9E | SETMAP (settable properties) | Get | Settable property map | | 0x9F | GETMAP (readable properties) | Get | Readable property map |

Example Prompts

Try these natural language prompts with your MCP client:

"Turn on my air conditioner" → calls set_operation with operation="on"
"Set temperature to 23 degrees" → calls set_temperature with temperature=23
"Switch to cooling mode" → calls set_operating_mode with mode="cool"
"What are the current temperatures?" → calls get_temperatures
"Find all ECHONET devices on my network" → calls discover_devices
"Set fan speed to level 3" → calls set_fan_speed with speed="level3"
"What EPC codes can I query on this device?" → calls get_property_maps
"Get the current operation status and target temperature" → calls query_epc with epcs=["0x80", "0xB3"]
"What settings are available for operating mode?" → calls get_epc_definition with epcs=["0xB0"]

Project Structure

echonetlite-mcp/
├── src/
│   ├── index.ts              # MCP server entry point & tool definitions
│   ├── echonetlite.ts        # ECHONETLite client wrapper (UDP communication)
│   ├── mra.ts                # MRA (Machine Readable Index) data loader & decoders
│   ├── devices/
│   │   └── homeAirConditioner.ts  # HVAC device handler (status, controls, notifications)
│   ├── types.ts              # TypeScript type definitions
│   └── config.ts             # Configuration constants
├── mra/
│   ├── mraData/              # MRA JSON definition files
│   ├── COPYRIGHT.txt         # MRA copyright information
│   └── ReleaseNote_en.md     # MRA release notes
├── package.json
├── tsconfig.json
├── LICENSE
└── README.md

Development

# Clone and install dependencies
git clone https://github.com/scottyphillips/echonetlite-mcp.git
cd echonetlite-mcp
npm install

# Build TypeScript
npm run build

# Watch mode for development
npm run dev

# Run the server
node dist/index.js

MRA Integration

This server includes MRA (Machine Readable Index) data for rich property metadata:

Property names & descriptions — human-readable labels for each EPC code
Value decoding — raw hex values decoded to meaningful strings/numbers using MRA definitions
Enum/bitmap support — full enumeration of possible values for settable properties
$ref resolution — external definition references are resolved automatically

The MRA data enables tools like query_epc and get_epc_definition to return enriched responses without manual value mapping.

MCP Servers