mitsubishi-comfort

Async Python library for controlling Mitsubishi minisplit systems via the Kumo Cloud V3 API and local HTTP API.

Features

• Cloud discovery -- authenticate with Kumo Cloud to discover devices, retrieve credentials, and fetch device status
• Local control -- communicate directly with minisplit units over your LAN for low-latency operation
• Indoor units -- full control of mode, temperature setpoints, fan speed, and vane direction
• Kumo stations -- read outdoor temperature and signal strength from headless outdoor units
• Async native -- built on aiohttp for use in asyncio applications

Installation

pip install mitsubishi-comfort

Quick start

import asyncio
from mitsubishi_comfort import MitsubishiCloudAccount, IndoorUnit, Mode

async def main():
    # Discover devices via cloud API
    account = MitsubishiCloudAccount("user@example.com", "password")
    await account.login()
    devices = await account.discover_devices()

    # Control a device locally
    info = list(devices.values())[0]
    unit = IndoorUnit(
        name=info.label,
        address=info.address,
        password_b64=info.password,
        crypto_serial_hex=info.crypto_serial,
        serial=info.serial,
    )
    await unit.update_status()
    print(f"Room temp: {unit.status.room_temperature}")

    await unit.set_mode(Mode.COOL)
    await unit.set_cool_setpoint(22.0)

asyncio.run(main())

API overview

Cloud account

MitsubishiCloudAccount(username, password) authenticates with the Kumo Cloud V3 API.

Indoor unit

IndoorUnit controls a minisplit indoor unit over the local HTTP API.

Kumo station

KumoStation reads data from headless outdoor units (no control commands).

Enums

• Mode -- OFF, COOL, HEAT, DRY, FAN, AUTO
• FanSpeed -- SUPER_QUIET, QUIET, LOW, POWERFUL, SUPER_POWERFUL, AUTO
• VaneDirection -- HORIZONTAL, MID_HORIZONTAL, MIDPOINT, MID_VERTICAL, VERTICAL, AUTO, SWING

Network discovery

probe_candidate_ips(devices, candidate_ips) matches device serials to LAN IP addresses by probing with device credentials.

Acknowledgments

This library builds on the protocol work of pykumo by Doug Larrick and contributors, which reverse-engineered the Kumo Cloud service and the local HTTP API used by Mitsubishi WiFi adapters. In particular:

• The local API auth token computation (auth.py) is derived from pykumo's PyKumoBase._token.
• The V3 cloud client (cloud.py), including the Socket.IO credential retrieval flow, is an async adaptation of pykumo's V3 support contributed by Ethan Kiczek.
• The credential-probe approach to matching device serials to LAN addresses (discovery.py) follows pykumo's local discovery design.

mitsubishi-comfort exists as a separate library because it targets asyncio applications (notably Home Assistant), which requires a different architecture than pykumo's synchronous design. If you need a synchronous client, use pykumo.

License

MIT. Portions derived from pykumo, Copyright (c) 2019 dlarrick, also under the MIT license — see the third-party notices in LICENSE.