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PiHome – home automation done with Raspberry PI and Python

PiHome – home automation done with Raspberry PI and Python

Presented at PyWaw Summit in Warsaw

Wojciech Sznapka

May 26, 2015

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  1. PiHome – home automation
    done with Raspberry PI and Python
    Wojciech Sznapka
    Head of Development @ Cherry Poland
    Twitter: @sznapka
    PyWaw Summit. Warsaw 2015

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  3. Features

    Steering (switches):
    – Floor heating steering (on / off / delayed)
    – Hot water pump steering
    – Lights

    – Current temperature
    – Draw charts

    – switches state
    – temperatures

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  4. Hardware

    Raspberry PI B

    Switches module (230V) controlled via Ethernet
    (ready-made board)

    Dallas ds18b20 one wire temperature sensors

    Bread-board and bunch of wires

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  8. Software

    – with GPIO modules
    – Supervisord
    – Apache + WSGI

    – Python
    – Flask
    – JSON

    – AngularJS as a SPA frontend
    – Twitter Bootstrap
    – optimized for mobile
    – Grunt, Bower, Yeoman

    CLI tasks
    – Queue consumers
    – Celery tasks

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  9. Software

    RabbitMQ – relay “store” requests (failover)

    Celery - “delayed” on / off

    MongoDB (hosted at compose.io) – history of
    sensors and switches


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  11. Future

    Predict time when user wants to use hot water*

    More switches (door, window blinds)

    Connect to alarm to know where users are (PIR sensors)
    * Machine learning

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  12. Lesson learned

    Don't rely much on WiFi (have fallback / queue)

    Don't play around with higher voltages unless
    you're pretty sure what're you doing...

    Be prepared for frequent and random restarts

    There plenty of ready made components, soldering
    is often last thing, if you want to get things fast

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  13. Thanks :-)
    [email protected]

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