brew-controller

A brewing controller based on a Raspberry PI developed in Java

Setup Raspberry Pi

• install dietpi (set static ip)
• dietpi-config
  • location/timezone/keyboard
  • change password
• rename user dietpi:
  • usermod -l pi dietpi
  • usermod -d /home/pi -m pi
  • usermod -aG sudo pi
  • usermod -aG adm pi
• dietpi-software:
  • openssh instead of dropbear
  • sqlite
  • jdk
  • wiringpi
• install jetty 9
  • sudo apt-get install jetty9
  • sudo systemctl enable jetty9
  • make database-path writable for jetty (see also: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=933857)
    • usermod -aG adm pi
    • copy /lib/systemd/system/jetty9.service /etc/systemd/system
    • pico /etc/systemd/system/jetty9.service
      • add ReadWritePaths=/opt/sqlite/databases/
    • copy and expand jetty_lib_ext.tar to <jetty9_home>/lib/ext
    • systemctl daemon-reload
    • systemctl restart jetty9
    • ln -s /usr/share/jetty9/ ~./jetty
• create database location and make it writable
• configure database location inside environment.properties (i.e. /usr/local/etc)
• create symlink to environment.properties at
  • /usr/share/jetty9/
  • /root

Password less login from Client-PC

• cd ~/.ssh
• ssh-keygen -t rsa -m PEM
• ssh-copy-id -i id_rsa.pub pi@<pi_ip_address>

Add Application

• copy and adjust sample config files to pi
• mvn clean install
• exec target "load-to-pi" from brew-controller/uploadToPi.xml (first adjust keyfile!)
• exec target "load-to-pi" from brew-server/uploadWarToPi.xml (first adjust keyfile!)

Start Application

• ssh pi@<pi_ip_address>
• sudo java -jar brew-controller.jar -brew
• Go to http://<pi_ip_address>:8080/brew-server/app/

Debugging Application

• sudo java -agentlib:jdwp=transport=dt_socket,server=y,suspend=y,address=8000 -jar brew-controller.jar -brew

ToDO

• switch to pi4j v2 (v1 is a little bit buggy)
• update DietPi