How Ruby Makes Better Beer

Ruby on Ales 2013 talk on using Ruby and the Raspberry Pi to automate, monitor, and design craft beer recipes.

Transcript

1. How Ruby Makes
   Better Beer
   Andrew Nordman
   cadwallion @cadwallion
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2. =
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3. =
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4. +
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5. 5
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6. • Started Homebrewing in 2010
   • Founded Company in 2012
   • “Nano” Brewery Scale
   • Licensing in Progress
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7. 7
   Craft Brewing is a blend of Art and
   Science
   + =
   http://goo.gl/O7Qdc http://goo.gl/Z8oag
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8. Why Raspberry Pi?
   • Raspberry Pi is extremely cost-effective
   • Arduino ethernet shields are expensive
   • I like Ruby
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9. Grain to Glass
   • Creating a Recipe
   • Brew a Batch (Hot-Side Brewing)
   • Fermenting (Cold-Side Brewing)
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10. Creating a Recipe
    • Pick a style or key characteristics
    • Pick ingredients to match
    • Plan Fermentation
    • Plan Carbonation
    • Use BeerSmith!
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    http://goo.gl/Kdlji
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11. Batch Notes / Brew Log
    • Treat your recipes like applications
    • Treat your equipment like servers
    • Log Everything about a Batch
    • Feed Batch Notes back to Recipe
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12. BrewLab
    • Picks up where BeerSmith leaves off
    • Imports BeerSmith Recipes
    • Associates Batches with Recipes
    • Stores Times, Temperatures, and Notes
    • API to Integrate with Brewing Equipment
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13. Brewscribe
    • https://github.com/cadwallion/brewscribe
    • Imports BeerSmith/BeerXML Files
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    document  =  Brewscribe.import  File.read  './spec/support/recipe.bsmx'
    recipe  =  document.recipes.first
    recipe.ingredients.class  #  =>  Brewscribe::IngredientList
    recipe.ingredients.grains.class  #  =>  Array
    recipe.ingredients.grains.first.class  #  =>  Brewscribe::Grain
    recipe.ingredients.grains.first.name  #  =>  "Pale  Malt  (2  Row)  US"
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14. Brewing a Batch
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15. Mashing Process
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16. Boiling Process
    • Reduction of sweet wort for concentration
    • Periodic addition of hops for bitterness
    • Periodic addition of flavorings
    • 60-120 minutes at hard boil
    • AUTOMATE!
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17. Brewby
    • Runs on MRI 1.9, porting to mruby
    • Handles HERMS/RIMS
    • Small expansion board for relay/sensor
    connectors
    • Touchscreen GUI
    • Raspberry Pi GPIO
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18. Temper
    • https://github.com/cadwallion/temper
    • PID-based Anger Temperature Management
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    require  'temper'
    temper  =  Temper::PID.new(interval:  1000,  minimum:  0,  maximum:  1000,  direction:  :direct)
    temper.tune(9.0,  25.0,  6.0)      #  Set  Kp,  Ki,  and  Kd
    temper.setpoint  =  100.0              #  Set  target  temperature  (Degrees  Fahrenheit)
    while  input  =  read_sensor()      #  Replace  read_sensor  with  your  external  system
       output  =  temper.control(input)
       #  output  is  a  value  between  minimum  and  maximum.  This  can  be  used  for  thresholds  or
       #  PWM-­‐based  control
    end
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19. Brewby Integration
    • Uses PWM to handle Boil Process
    • Loads Recipe from BrewLab (or .bsmx on Pi)
    • Sends sensor data to BrewLab
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20. Hardware
    • 5500W Water Heater Element
    • DS18B20 Temperature Sensor
    • 40A Solid State Relay
    • Raspberry Pi
    • 240V/30A Mains Power
    • Handles up to 20 Gallon Batches
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22. Operation
    • Start Strike Water
    • Start Mash
    • Start Lauter
    • Start Boil via Manual Power Level
    • Pump to Chiller
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23. Fermentation
    • Keep beer at Specific Temperature
    • Log and Monitor Temperature
    • AUTOMATE!
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24. Problems with
    Raspberry Pi
    • Linux kernel isn’t ‘real-time’
    • Limited number of GPIO
    • Single PWM Timer GPIO
    • Single 1-Wire GPIO
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25. Arduino!
    • Raspberry Pi handles networking, GUI, etc
    • Arduino handles low-level hardware
    interface
    • Raspberry Pi interfaces Arduino via I2C
    • Requires logic-level shifter
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26. YeastyMon
    • Raspberry Pi + Arduino Uno
    • Up to 6 Temperature Sensors
    • Passive Monitoring Mode or Active Control
    • Interfaces with BrewLab to send
    fermentation data
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27. Future
    • Add Support for Solenoid Valves
    • Switch Brewby to I2C
    • Large-scale Brewby Panels (100A+)
    • Open BrewLab to Public
    • Release BrewLab API Gem
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