smarthomeconnect 0.2

The Smart Home Connect home automation framework based on AsyncIO

Smart Home Connect

Smart Home Connect (SHC) is yet another Python home automation framework—in line with Home Assistant, SmartHome.py, SmartHomeNG and probably many more. Its purpose is to connect "smart home" devices via different communication protocols, provide means for creating automation rules/scripts and a web interface for controling the devices via browser. It is currently under development and does not provide a stable API or complete documentation yet.

In contrast to most other home automation frameworks, SHC is completely based on Python's asynchronous coroutines (asyncio) and configured via pure Python scripts instead of YAML files or a fancy web engineering tool. Its configuration is based on instantiating Connectable objects (like state variables, User Interface Buttons, KNX Group Addresses, etc.) and interconnecting them with simple Read/Subscribe patterns. Thus, it is quite simple but really powerful, allowing on-the-fly type conversion, expressions for calculating derived values, handling stateless events, …. Read more about SHC's base concepts in the documentation.

Features

• interfaces
  • KNX bus via KNXD
  • DMX (via Enttec DMX USB Pro and compatible interfaces)
  • HTTP/REST API + websocket API
• websocket-based web user interface (using aiohttp, Jinja2 and Semantic UI)
  • widgets: buttons, text display, text/number inputs, dropdowns, images with placeable buttons etc., …
• configuration of data points/variables and definition of automation rules in plain Python
  • full power of Python + intuitive representation and interconnection of different interfaces
  • type checking and extensible type conversion system
  • connecting objects via Python expressions
• chronological and periodic timers for triggering rules
• Logging/Persistence
  • to MySQL (using aiomysql)

Roadmap

• Log view web widget (line charts, stripe charts, log lists)
• native HTTP API Client
• Logging to Influx-DB
• More web widgets
  • Gauges
• MQTT interface (incl. JSON-over-MQTT)

Getting started

Warning: This project is still under rapid development. Interfaces may change without individual warnings/notifications, even in non-backwards-compatible ways.

0. (Optional) Create a virtual environment to keep your Python package repositories clean:

   python3 -m virtualenv -p python3 venv
   . venv/bin/activate
   

   Read more about virtual environments in the offical Python docs.

1. Install the smarthomeconnect Python distribution from PyPI:

   pip3 install smarthomeconnect
   

2. Create a Python script (let's call it my_home_automation.py) which imports and starts Smart Home Connect:

   #!/usr/bin/env python3
   import shc
   
   # TODO add interfaces and Variables
   
   shc.main()
   

   When running this script (python3 my_home_authomation.py), SHC should start and exit (successfully) immediately, since no interfaces are defined. See the code below for an example with the Web UI and the KNX interface.

3. Read about the basic concepts of SHC and available interfaces in the SHC documentation. Extend your script to create interfaces and Variables, connect connectable objects, define logic handlers and let them be triggered.

Simple Usage Example

import datetime
import shc

# Configure interfaces
knx_connection = shc.interfaces.knx.KNXConnector()
web_interface = shc.web.WebServer("localhost", 8080, "index")

web_index_page = web_interface.page('index')


# Simple On/Off Variable, connected to KNX Group Address (initialized per Group Read telegram),
# with a switch widget in the web user interface
ceiling_lights = shc.Variable(bool, "ceiling lights")\
    .connect(knx_connection.group(shc.interfaces.knx.KNXGAD(1, 2, 3), dpt="1", init=True))

web_index_page.add_item(shc.web.widgets.Switch("Ceiling Lights")
                        .connect(ceiling_lights))


# Store timestamp of last change of the ceiling lights in a Variable (via logic handler) and show
# it in the web user interface
ceiling_lights_last_change = shc.Variable(
    datetime.datetime, "ceiling lights last change",
    initial_value=datetime.datetime.fromtimestamp(0))

@ceiling_lights.trigger
@shc.handler()
async def update_lastchange(_new_value, _source):
    await ceiling_lights_last_change.write(datetime.datetime.now())

web_index_page.add_item(
    shc.web.widgets.TextDisplay(datetime.datetime, "{:%c}", "Last Change of Ceiling Lights")
    .connect(ceiling_lights_last_change))


# close shutters via button in the web user interface (stateless event, so no Variable required) 
web_index_page.add_item(shc.web.widgets.ButtonGroup("Shutters", [
    shc.web.widgets.StatelessButton(shc.interfaces.knx.KNXUpDown.DOWN,
                                    shc.web.widgets.icon("arrow down"))
    .connect(knx_connection.group(shc.interfaces.knx.KNXGAD(3, 2, 1), dpt="1.008"))
]))

# use expression syntax to switch on fan when temperature is over 25 degrees 
temperature = shc.Variable(float, "temperature")\
    .connect(knx_connection.group(shc.interfaces.knx.KNXGAD(0, 0, 1), dpt="9", init=True))
fan = shc.Variable(bool, "fan")\
    .connect(knx_connection.group(shc.interfaces.knx.KNXGAD(0, 0, 2), dpt="1"))\
    .connect(temperature.EX > 25.0)

# Start up SHC
shc.main()

License

Smart Home Connect is published under the terms of the Apache License 2.0.

It's delivered with multiple third party works:

• jQuery (MIT License)
• Fomantic UI CSS framework (MIT License)
• “Prism” – Subtle Patterns by Toptal Designers (Creative Commons BY-SA 3.0)
• iro.js (Mozilla Public License 2.0)

See LICENSE and NOTICE file for further information.

SHC depends on the following Python packages:

• aiohttp and its dependencies (Apache License 2.0, MIT License, Python Software Foundation License, LGPL 2.1, 3-Clause BSD License)
• aiomysql and PyMySQL (MIT License)
• jinja2 and MarkupSafe (BSD-3-Clause License)
• knxdclient (Apache License 2.0)
• pyserial-asyncio & pySerial (BSD-3-Clause License)

Development

Feel free to open an issue on GitHub if you miss a feature or find an unexpected behaviour or bug. Please, consult the documentation on the relevant topic and search the GitHub issues for existing reports of the issue first.

If you want to help with the development of Smart Home Connect, your Pull Requests are always appreciated.

Setting up a dev environment for SHC is simple: Clone the git repository and install the development dependencies, listed in requirements.txt:

git clone https://github.com/mhthies/smarthomeconnect
cd smarthomeconnect
pip3 install -r requirements.txt

You may want to use a virtual environment to avoid messing up your Python packages.

Please make sure that all the unittests are passing, when submitting a Pull Request:

python3 -m unittest

The web tests require Firefox and geckodriver to be installed on your systems.

Additionally, I'd like to keep the test coverage on a high level. To check it, you may want to determine it locally, using the coverage tool:

coverage run -m unittest
coverage html