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myBrew

QT-based Beer Brewing Controller and Monitoring

UI

- The main user interface is intended to be touchscreen friendly, but needs some more work to evaluate button sizes - There are tabs for displays relevant to each step of the brewing process.

File Structure

  • Base directory of repo includes source code and project files for the QT IDE-based GUI for myBrew
  • Subdirectories include helper-function Python apps for database interactions, Raspberry Pi GPIO interaction, PID & PWM Controller libraries
  • The QT GUI and Python-based processing apps are linked via an sqlite database to allow for multi-service data access which also enables datalogging for post-brew session data review.

Hardware

  • System is designed to run on a Raspberry Pi, should support any version after Rasbperry Pi 1 B
  • GPIO control of heating elements is wired to 40A-capable Solid State Relays which are wired to 120VAC residential power circuits.
  • Pulse Width Modulation (PWM) is done using Raspberry Pi PWM library. This enables gradual heating needed to implement PID algorithm.