PiHome – home automation done with Raspberry PI and Python

Presented at PyWaw Summit in Warsaw

Transcript

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
   ●
   Sensors:
   – Current temperature
   – Draw charts
   ●
   History:
   – 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
   ●
   Raspbian
   – with GPIO modules
   – Supervisord
   – Apache + WSGI
   ●
   Pihome-api
   – Python
   – Flask
   – JSON
   ●
   PiHome
   – 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
   ●
   Memcached
   

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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 :-)
    https://github.com/wowo/pihome
    https://github.com/wowo/pihome-api
    wojciech.sznapka@cherrygroup.com
    

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