joulia-controller

Controller for the electric brewing hardware.

Quickstart

Install Raspbian on a fresh SD card, and boot your Raspberry Pi.

Enable SSH (optional), for installing remotely. Make sure the password for the main account is changed to a secure password. Enable I2C and SPI.

Install Anaconda (Miniconda), using the default options (installing to /home/pi/miniconda):

wget http://repo.continuum.io/miniconda/Miniconda3-latest-Linux-armv7l.sh
bash Miniconda3-latest-Linux-arm71.sh

Answer all questions posed.

Clone the source: git clone https://github.com/willjschmitt/joulia-controller.git

Create a conda environment and install the dependencies:

cd joulia-controller
/home/pi/miniconda3/bin/conda create --name joulia-controller python=3
source /home/pi/miniconda3/bin/activate joulia-controller
pip install -r requirements.txt

Create a log directory for joulia and change the owner to pi:

sudo mkdir /var/log/joulia
sudo chown pi:pi /var/log/joulia

Automatic Startup

To automatically, launch the software on startup, install the contents from crontab into the root cron table using:

sudo crontab -e

In the crontab, you must update the environment variables in angle brackets per the definitions:

• JOULIA_WEBSERVER_HOST - The webserver this controller should stream data to (usually joulia.io)
• JOULIA_WEBSERVER_AUTHTOKEN - The authtoken provided in your dashboard on joulia.io, used to authenticate the controller and identify controller information.

Manual Startup

Run the controller:

cd joulia-controller
source /home/pi/miniconda3/bin/activate joulia-controller
export JOULIA_WEBSERVER_HOST=joulia.io
export JOULIA_WEBSERVER_AUTHTOKEN=<insert token>
python main.py

Connections to Hardware

This project is meant to be run on a Raspberry Pi and makes use of the GPIO pins.

Analog Measurement

Make sure I2C is appropriately turned on on the Raspberry Pi. Install the Arduino I2C Analog Reader software onto the Arduino, so it can communicate the temperature measurements to the Raspberry Pi.

Digital Control

Connect the Solid State Relay input gate for the Boil Kettle to Pin 0 on the Raspberry Pi. Connect the Solid State Relay input gate for the Main Pump to Pin 1 on the Raspberry Pi.

Related Projects

This project is part of the series of projects for the Joulia Brewing System:

• joulia-webserver - Remote webserver to log data and allow for livestreaming of data to other clients and receive commands from other clients.
• joulia-controller - This project.
• joulia-fermentation - Planned project to control the fementation operations.

Licensing

Copyright 2016 William Schmitt. All Rights Reserved.

The intention is to make this project open-sourced, but at this moment is maintained under personal copyright until a few things can be worked through.