Metadata-Version: 2.1
Name: pypck
Version: 0.7.6
Summary: LCN-PCK library
Home-page: https://github.com/alengwenus/pypck
Author: Andre Lengwenus
Author-email: alengwenus@gmail.com
License: UNKNOWN
Description: # pypck - Asynchronous LCN-PCK library written in Python
        
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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_address_conn(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())
        ```
        
        ## pypck REPL in ipython
        
        **pypck** relies heavily on asyncio for talking to the LCN-PCHK software. This
        makes it unusable with the standard python interactive interpreter.
        Fortunately, ipython provides some support for asyncio in its interactive
        interpreter, see
        [ipython autoawait](https://ipython.readthedocs.io/en/stable/interactive/autoawait.html#).
        
        ### Requirements
        
        - **ipython** at least version 7.0 (autoawait support)
        - **pypck**
        
        ### Example session
        
        ```
        Python 3.8.3 (default, Jun  9 2020, 17:39:39)
        Type 'copyright', 'credits' or 'license' for more information
        IPython 7.19.0 -- An enhanced Interactive Python. Type '?' for help.
        
        In [1]: from pypck.connection import PchkConnectionManager
           ...: from pypck.lcn_addr import LcnAddr
           ...: import asyncio
        
        In [2]: connection = PchkConnectionManager(host='localhost', port=4114, username='lcn', password='lcn')
        
        In [3]: await connection.async_connect()
        
        In [4]: module = connection.get_address_conn(LcnAddr(seg_id=0, addr_id=10, is_group=False), request_serials=False)
        
        In [5]: await module.request_serials()
        Out[5]:
        {'hardware_serial': 127977263668,
         'manu': 1,
         'software_serial': 1771023,
         'hardware_type': <HardwareType.UPU: 26>}
        
        In [6]: await module.dim_output(0, 100, 0)
           ...: await asyncio.sleep(1)
           ...: await module.dim_output(0, 0, 0)
        Out[6]: True
        ```
        
        ### Caveats
        
        ipython starts and stops the asyncio event loop for each toplevel command
        sequence. Also it only starts the loop if the toplevel commands includes async
        code (like await or a call to an async function). This can lead to unexpected
        behavior. For example, background tasks run only while ipython is executing
        toplevel commands that started the event loop. Functions that use the event
        loop only internally may fail, e.g. the following would fail:
        
        ```
        In [4]: module = connection.get_address_conn(LcnAddr(seg_id=0, addr_id=10, is_group=False), request_serials=True)
        ---------------------------------------------------------------------------
        RuntimeError                              Traceback (most recent call last)
        <ipython-input-7-cd663974bde2> in <module>
        ----> 1 module = connection.get_address_conn(modaddr)
        
        /pypck/connection.py in get_address_conn(self, addr, request_serials)
            457                 address_conn = ModuleConnection(self, addr)
            458                 if request_serials:
        --> 459                     self.request_serials_task = asyncio.create_task(
            460                         address_conn.request_serials()
            461                     )
        
        /usr/local/lib/python3.8/asyncio/tasks.py in create_task(coro, name)
            379     Return a Task object.
            380     """
        --> 381     loop = events.get_running_loop()
            382     task = loop.create_task(coro)
            383     _set_task_name(task, name)
        
        RuntimeError: no running event loop
        ```
        
        See
        [ipython autoawait internals](https://ipython.readthedocs.io/en/stable/interactive/autoawait.html#internals)
        for details.
        
Platform: UNKNOWN
Classifier: Programming Language :: Python :: 3
Classifier: License :: OSI Approved :: Eclipse Public License 2.0 (EPL-2.0)
Classifier: Operating System :: OS Independent
Classifier: Topic :: Home Automation
Requires-Python: >=3.7
Description-Content-Type: text/markdown
