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====== Notes ======
===== Basic Installation =====
  * Get raspbian image (typically a ZIP from [[https://www.raspberrypi.org/downloads/raspbian]])
  * Unzip image, write to SD card:<code>dd if=raspbiandownload.img of=/dev/sdX bs=4M conv=fsync</code>
  * Default login is ''pi'' with password ''raspberry''
===== misc =====
  * Change root and pi passwords
  * Enable SSH at boot, use raspi-config in the "Interfacing Options" section
  * Add user, ensure groups, and sudoers
  * Update host name in:
    * ''/etc/hostname''
    * ''/etc/hosts''
  * If necesary, resize root partition, reboot, resize fs
  * Install (via apt-get) some basics:
    *	ksh
    *	htop
    *	xterm
    *	rsync
    *	git
    *	libudev-dev
    *	libusb-1.0-0-dev
    *	libfox-1.6-dev
    *	autotools-dev
    *	autoconf
    *	automake
    *	libtool
    *	xfe (optional)

===== USB Relay =====
  * Make a copy of /var to /home/sys
  * Prune /home/sys/var
  * Set up tmpfs mounts, like (pay attention to mode and size): \\ ''tmpfs /var/log tmpfs defaults,noatime,nosuid,mode=0755,size=100m 0 0''
    * /tmp, no mode, size=100M
    * /var/tmp, no mode, size=30M
    * /var/log, mode=0755, size=100M
    * /var/spool/mqueue, mode=700, gid=12, size=30M
  * Clone source for USB relay control: <code>git clone git://github.com/signal11/hidapi.git
git clone https://github.com/darrylb123/usbrelay.git</code>
  * Build HIDAPI, cd to source dir and:<code>./bootstrap
./configure --prefix=/usr --enable-testgui
make
make install</code>

You need HIDAPI and USBRELAY: \\
<code>git clone git://github.com/signal11/hidapi.git</code>

Check out the readme, and install dependencies before installing. \\
then: <code>git clone https://github.com/darrylb123/usbrelay.git</code>

Then, in usbrelay folder: <code>gcc -o usbrelay usbrelay.c -lhidapi-libusb</code>
Then do: <code>ldconfig</code>

Read more here:
  * http://www.signal11.us/oss/hidapi/
  * https://github.com/darrylb123/usbrelay

To get status: <code>./usbrelay 2>/dev/null</code> \\

To get status in bash script: \\
<code>
$ eval $(sudo ./usbrelay 2>/dev/null)
$ echo $PSUIS_2
</code>
Turn on: <code>/usbrelay EO5ZA_1=1</code>
Turn off: <code>/usbrelay EO5ZA_1=0</code>
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