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 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