PyCoway

PyCoway is a typed asyncio client for Coway AIRMEGA devices, covering cloud authentication, purifier status, and remote control through Coway IoCare.

Features

• Async API built on aiohttp
• Typed dataclass models for purifier state
• Device control: power, fan speed, light, timers, modes, button lock, and more
• Air-quality readings: PM2.5, PM10, CO2, VOC, AQI
• Filter health monitoring: pre-filter, MAX2, and odor filter with detailed supply info
• Unified data from three API sources: IoT JSON, legacy REST, and HTML scrape
• Automatic token and session management
• Full test coverage with GitHub Actions CI
• Automated semantic version bumping, GitHub releases, and PyPI publishing

Requirements

• Python 3.11 or newer
• A Coway IoCare account with at least one registered purifier

Installation

pip install pycoway

For local development:

git clone https://github.com/Antonio112009/pycoway.git
cd pycoway
pip install -e ".[dev]"

Quick Start

import asyncio

from pycoway import CowayClient


async def main() -> None:
    async with CowayClient("email@example.com", "password") as client:
        await client.login()
        data = await client.async_get_purifiers_data()

        for device_id, purifier in data.purifiers.items():
            print(f"{purifier.device_attr.name} ({device_id})")
            print(f"  Power: {'On' if purifier.is_on else 'Off'}")
            print(f"  Fan Speed: {purifier.fan_speed}")
            print(f"  PM2.5: {purifier.particulate_matter_2_5}")
            print(f"  AQI: {purifier.air_quality_index}")


asyncio.run(main())

Skipping Password Change Prompt

Coway requires users to change their password every 60 days. If the password hasn't been updated within that window, the API returns a password-change form instead of completing login, causing a PasswordExpired exception.

To skip this prompt and continue logging in without changing your password, set skip_password_change to True before calling login():

client = CowayClient("email@example.com", "password", skip_password_change=True)
await client.login()

Note: This does not disable the Coway password policy — it simply submits the "change next time" option on the password-change page so login can proceed.

Device Control

Every control method accepts the device_attr from a CowayPurifier instance:

import asyncio

from pycoway import CowayClient, LightMode


async def control_first_purifier() -> None:
    async with CowayClient("email@example.com", "password") as client:
        await client.login()
        data = await client.async_get_purifiers_data()

        purifier = next(iter(data.purifiers.values()))
        attr = purifier.device_attr

        await client.async_set_power(attr, is_on=True)
        await client.async_set_auto_mode(attr)
        await client.async_set_fan_speed(attr, speed="2")
        await client.async_set_light(attr, light_on=True)
        await client.async_set_light_mode(attr, LightMode.AQI_OFF)
        await client.async_set_timer(attr, time="120")


asyncio.run(control_first_purifier())

Available Control Methods

Method	Parameters	Description
async_set_power()	is_on: bool	Turn purifier on or off
async_set_auto_mode()	—	Switch to auto mode
async_set_night_mode()	—	Switch to night mode
async_set_eco_mode()	—	Switch to eco mode (AP-1512HHS only)
async_set_rapid_mode()	—	Switch to rapid mode (250s only)
async_set_fan_speed()	speed: str	Set fan speed: "1", "2", or "3"
async_set_light()	light_on: bool	Toggle light on/off (not for 250s)
async_set_light_mode()	light_mode: LightMode	Set light mode for advanced models
async_set_timer()	time: str	Off timer in minutes: "0", "60", "120", "240", "480"
async_set_smart_mode_sensitivity()	sensitivity: str	"1" sensitive, "2" moderate, "3" insensitive
async_set_button_lock()	value: str	"1" lock, "0" unlock
async_change_prefilter_setting()	value: int	Wash frequency: 2, 3, or 4 weeks

Data Model

async_get_purifiers_data() returns a PurifierData dataclass containing a purifiers dictionary keyed by device ID.

Each CowayPurifier includes:

Device Identity

Field	Type	Description
device_attr	DeviceAttributes	Device ID, model, name, place ID
mcu_version	str | None	Firmware version
network_status	bool | None	Network connectivity

Control State

Field	Type	Description
is_on	bool | None	Power state
auto_mode	bool | None	Auto mode
eco_mode	bool | None	Eco mode
night_mode	bool | None	Night mode
rapid_mode	bool | None	Rapid mode
fan_speed	int | None	Fan speed level
light_on	bool | None	Light state
light_mode	int | None	Device-specific light mode
button_lock	int | None	Button lock state
smart_mode_sensitivity	int | None	Smart mode sensitivity level
timer	str | None	Configured off timer
timer_remaining	int | None	Remaining timer (minutes)

Air Quality

Field	Type	Description
particulate_matter_2_5	int | None	PM2.5 (μg/m³)
particulate_matter_10	int | None	PM10 (μg/m³)
carbon_dioxide	int | None	CO₂ (ppm)
volatile_organic_compounds	int | None	VOC level
air_quality_index	int | None	AQI value
aq_grade	int | None	Air quality grade
lux_sensor	int | None	Ambient light sensor

Filter Health

Field	Type	Description
pre_filter_pct	int | None	Pre-filter remaining (%)
pre_filter_change_frequency	int | None	Wash frequency (weeks)
max2_pct	int | None	MAX2 filter remaining (%)
odor_filter_pct	int | None	Odor filter remaining (%)
filters	list[FilterInfo] | None	Detailed info for each filter/supply

FilterInfo

Each FilterInfo object in the filters list provides detailed supply data from the IoCare API:

Field	Type	Description
name	str | None	Filter name (e.g. "Pre-Filter", "Max2 Filter")
filter_remain	int | None	Filter life remaining (%)
filter_remain_status	str | None	Status: INITIAL, AVAILABLE, or REPLACE
replace_cycle	int | None	Replacement cycle value
replace_cycle_unit	str | None	Cycle unit: W (weeks) or M (months)
last_date	str | None	Last filter change date
next_date	str | None	Next recommended change date
pollutants	list[str]	Pollutants the filter targets (e.g. "Pollen", "VOCs")
description	str | None	What the filter removes
pre_filter	bool	Whether this is a pre-filter
server_reset	bool	Whether the filter can be reset remotely

For the complete schema, see src/pycoway/devices/models.py.

Data Sources

async_get_purifiers_data() combines three API sources automatically:

Source	Base URL	Provides
IoT JSON API	iocareapi.iot.coway.com	Device status, sensors, timer, air quality
Legacy REST API	iocare2.coway.com/api/proxy	Rich filter data (descriptions, pollutants, dates)
HTML Scrape	iocare2.coway.com/en	MCU firmware version, lux sensor

Exceptions

All exceptions inherit from CowayError:

from pycoway import AuthError, CowayError, PasswordExpired

Exception	Description
CowayError	Base exception for all library errors
AuthError	Authentication failed
PasswordExpired	Coway requires a password change
ServerMaintenance	Coway API is under maintenance
RateLimited	Coway temporarily blocked the account
NoPlaces	No places configured in the IoCare account
NoPurifiers	No air purifiers found

Migrating from cowayaio

If you're switching from the original cowayaio package:

pip uninstall cowayaio
pip install pycoway

Update your imports:

# Before
from cowayaio import CowayClient

# After
from pycoway import CowayClient

Development

git clone https://github.com/Antonio112009/pycoway.git
cd pycoway
pip install -e ".[dev]"
pytest
ruff check .
ruff format --check .

Feature work should branch from development, and pull requests merge into development first. See CONTRIBUTING.md for the full workflow.

Release Flow

• PRs from development to main trigger the release workflow when merged
• The workflow bumps src/pycoway/__version__.py
• PRs to main must have exactly one version label: patch, minor, or major
• A git tag and GitHub release are created automatically
• The package is published to PyPI automatically

Project Structure

src/pycoway/
├── __init__.py            # Public API exports
├── __version__.py         # Version string
├── client.py              # Public CowayClient entry point
├── constants.py           # API constants, sensor codes, IAQ field mapping
├── exceptions.py          # Public exception hierarchy
├── py.typed               # PEP 561 marker
├── account/
│   ├── auth.py            # Authentication (login, token refresh)
│   └── maintenance.py     # Server maintenance checks
├── devices/
│   ├── control.py         # Purifier control commands
│   ├── data.py            # Data fetching (legacy HTML + IoT JSON API)
│   ├── models.py          # Dataclasses (CowayPurifier, FilterInfo, PurifierData)
│   └── parser.py          # HTML/JSON response parsing and normalisation
└── transport/
    └── http.py            # HTTP base client with session management

License

MIT, originally authored by RobertD502