How Ruby Makes Better Beer

Transcript

1. How Ruby Makes Better Beer Andrew Nordman cadwallion @cadwallion 1

   Thursday, March 7, 13

2. = 2 Thursday, March 7, 13

3. = 3 Thursday, March 7, 13

4. + 4 Thursday, March 7, 13

5. 5 Thursday, March 7, 13

6. • Started Homebrewing in 2010 • Founded Company in 2012

   • “Nano” Brewery Scale • Licensing in Progress 6 Thursday, March 7, 13

7. 7 Craft Brewing is a blend of Art and Science

   + = http://goo.gl/O7Qdc http://goo.gl/Z8oag Thursday, March 7, 13

8. Why Raspberry Pi? • Raspberry Pi is extremely cost-effective •

   Arduino ethernet shields are expensive • I like Ruby 8 Thursday, March 7, 13

9. Grain to Glass • Creating a Recipe • Brew a

   Batch (Hot-Side Brewing) • Fermenting (Cold-Side Brewing) 9 Thursday, March 7, 13

10. Creating a Recipe • Pick a style or key characteristics

    • Pick ingredients to match • Plan Fermentation • Plan Carbonation • Use BeerSmith! 10 http://goo.gl/Kdlji Thursday, March 7, 13

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 11 Thursday, March 7, 13

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 12 Thursday, March 7, 13

13. Brewscribe • https://github.com/cadwallion/brewscribe • Imports BeerSmith/BeerXML Files 13 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" Thursday, March 7, 13

14. Brewing a Batch 14 Thursday, March 7, 13

15. Mashing Process 15 Thursday, March 7, 13

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! 16 Thursday, March 7, 13

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 17 Thursday, March 7, 13

18. Temper • https://github.com/cadwallion/temper • PID-based Anger Temperature Management 18 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 Thursday, March 7, 13

19. Brewby Integration • Uses PWM to handle Boil Process •

    Loads Recipe from BrewLab (or .bsmx on Pi) • Sends sensor data to BrewLab 19 Thursday, March 7, 13

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 20 Thursday, March 7, 13

21. 21 Thursday, March 7, 13

22. Operation • Start Strike Water • Start Mash • Start

    Lauter • Start Boil via Manual Power Level • Pump to Chiller 22 Thursday, March 7, 13

23. Fermentation • Keep beer at Specific Temperature • Log and

    Monitor Temperature • AUTOMATE! 23 http://goo.gl/DaVyE Thursday, March 7, 13

24. Problems with Raspberry Pi • Linux kernel isn’t ‘real-time’ •

    Limited number of GPIO • Single PWM Timer GPIO • Single 1-Wire GPIO 24 Thursday, March 7, 13

25. Arduino! • Raspberry Pi handles networking, GUI, etc • Arduino

    handles low-level hardware interface • Raspberry Pi interfaces Arduino via I2C • Requires logic-level shifter 25 Thursday, March 7, 13

26. YeastyMon • Raspberry Pi + Arduino Uno • Up to

    6 Temperature Sensors • Passive Monitoring Mode or Active Control • Interfaces with BrewLab to send fermentation data 26 Thursday, March 7, 13

27. Future • Add Support for Solenoid Valves • Switch Brewby

    to I2C • Large-scale Brewby Panels (100A+) • Open BrewLab to Public • Release BrewLab API Gem 27 Thursday, March 7, 13