prana-api-client 0.4.0

Async API client for Prana heat recovery ventilator.

Prana Local API Client

Prana Local API Client is a small asynchronous Python library to interact with a local HTTP API exposed by a Prana device. It uses aiohttp and provides a simple interface to read device state and send control commands.

Requirements

• Python 3.9+
• aiohttp

Install dependencies:

pip install aiohttp

Overview

Primary class: PranaLocalApiClient

Constructor:

• PranaLocalApiClient(host: str, port: int = 80)

Behavior summary:

• Uses an aiohttp ClientSession. You can provide/retain a session by using the client as an async context manager (async with) or let the client create and close a temporary session for each call.
• Requests use a total timeout of 10 seconds.
• Non-200 HTTP responses raise PranaApiUpdateFailed.
• Network errors and timeouts raise PranaApiCommunicationError.

API (async)

• async def get_state() -> dict[str, Any] | None

  • GET /getState
  • Returns parsed JSON when the server responds with application/json. Returns None for responses without JSON body.

• async def set_speed(speed: int, fan_type: str) -> None

  • POST /setSpeed
  • JSON body: {"speed": speed, "fanType": fan_type}

• async def set_switch(switch_type: str, value: bool) -> None

  • POST /setSwitch
  • JSON body: {"switchType": switch_type, "value": value}

• async def set_brightness(brightness: int) -> None

  • POST /setBrightness
  • JSON body: {"brightness": brightness}

Notes:

• All methods call a shared internal _async_request which handles creating/closing sessions when needed, error handling and JSON parsing.

Exceptions

The library exposes a small exception hierarchy in prana_local_api_client.exceptions:

• PranaApiClientException — base exception class.
• PranaApiCommunicationError — network-level issues (wrapping aiohttp ClientError / timeout).
• PranaApiUpdateFailed(status: int) — HTTP request completed but device returned non-200 status.

Example of catching errors:

from prana_local_api_client.exceptions import PranaApiCommunicationError, PranaApiUpdateFailed

try:
    state = await client.get_state()
except PranaApiUpdateFailed as e:
    # HTTP-level error (server returned non-200)
    print("Device returned error status:", getattr(e, "status", None))
except PranaApiCommunicationError as e:
    # Network/timeout/etc.
    print("Communication error:", e)

Usage examples

Using the client as a context manager (recommended when performing multiple requests):

import asyncio
from prana_local_api_client.prana_api_client import PranaLocalApiClient

async def main():
    async with PranaLocalApiClient("192.168.1.100", 80) as client:
        state = await client.get_state()
        await client.set_speed(3, fan_type="main")
        await client.set_switch("power", True)
        await client.set_brightness(70)

asyncio.run(main())

Using the client without context manager (client will create and close a session per call):

from prana_local_api_client.prana_api_client import PranaLocalApiClient
import asyncio

async def short_run():
    client = PranaLocalApiClient("192.168.1.100")
    # session will be created internally for each call and closed afterwards
    state = await client.get_state()
    print(state)

asyncio.run(short_run())

Logging and debugging

The module uses a logger under its package name. Enable debugging in your application to see detailed logs:

import logging
logging.basicConfig(level=logging.DEBUG)

Timeouts and retries

• Default request timeout is 10 seconds (ClientTimeout(total=10)).
• This library does not implement automatic retries. If you need retries, implement them in your caller code (e.g., with tenacity) or wrap calls in retry logic.

Type hints

The client uses Python 3.9+ type hints (dict[str, Any]). Adjust your type checks accordingly.

Contributing