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# pypck - Asynchronous LCN-PCK library written in Python
[](https://pypi.org/project/pypck/)
[](https://github.com/pre-commit/pre-commit)
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## Overview
**pypck** is an open source library written in Python which allows the connection to the [LCN (local control network) system](https://www.lcn.eu). It uses the vendor protocol LCN-PCK.
To get started an unused license of the coupling software LCN-PCHK and a hardware coupler is necessary.
**pypck** is used by the LCN integration of the [Home Assistant](https://home-assistant.io/) project.
## Example
```python
"""Example for switching an output port of module 10 on and off."""
import asyncio
from pypck.connection import PchkConnectionManager
from pypck.lcn_addr import LcnAddr
async def main():
"""Connect to PCK host, get module object and switch output port on and off."""
async with PchkConnectionManager(
"192.168.2.41",
4114,
username="lcn",
password="lcn",
settings={"SK_NUM_TRIES": 0},
) as pck_client:
module = pck_client.get_device_connection(LcnAddr(0, 10, False))
await module.dim_output(0, 100, 0)
await asyncio.sleep(1)
await module.dim_output(0, 0, 0)
asyncio.run(main())
```
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