Installation

This installation guide will lead you through the whole process of installation and starting up your personal Braubar.

Raspberry Pi

A common and small distribution is the raspbian image. Download it and copy it to your sd card. For the copy enshure that the device is not mounted. You need to be root.

dd bs=4M if=/tmp/2016-03-18-raspbian-jessie-lie.img of=/dev/mmcblk0 && sync

syncenshures that all data will be written to the sd card. You can find the appropriate image on https://www.raspberrypi.org/downloads/

After you finished with sync, mount your sd card under /mnt

Open /mnt/boot/config.txt and add the following lines at the end

# rotate display
lcd_rotate=2

For IP settings modify /mnt/etc/dhcpdc.conf to configure your network settings.

interface eth0
static ip_address=192.168.3.100
static routers=192.168.3.1
static domain_server=8.8.8.8

Adjust IP settings to your needs. Now unmount your sd card and get your Pi running. Afterwards you need to get access to the Pi, my favorite is ssh.

Open raspi-conf and select entry Expand Filesystem to expand the image to the full size of your sd card and reboot. Othervise there is not enough space left.

Debian and Packages

The following software will be installed:

  • supervisor
  • python3
  • pip
  • iceweasel
  • xinit
  • matchbox

Debian 8: After boot run a update and then install the required software

apt-get update && apt-get install supervisor python3 python3-pip iceweasel xinit matchbox

X Window System

create .xinitrc file in home folder

matchbox-window-manager &
exec /usr/bin/iceweasel http://localhost:5000

To start iceweasel in fullscreen mode it is neccesary to start it one, enter fullscreen mode and exit. Then it it will be saved in your profile. Another option is to create your own profile, but I won’t handle that here.

Auto Login

Edit file at /etc/systemd/system/getty.target.wants/getty@tty1.service and change ExecStart= line in section [Service] to this

ExecStart=-/sbin/agetty -a pi %I $TERM

To get X with iceweasel started automatically add the following snippet to the end of ~/.bash_login

[[ -z $DISPLAY && $(tty) == /dev/tty1 ]] && exec startx

Since we have no window manager which runs in systemd it is neccesary to set multi-user.target as default

systemctl set-default multi-user.target

But be careful, now you can’t login to anything other than the iceweasel application. Except you do a remote login.

Braubar installation

Download braubar-pi to you Pi

wget https://github.com/braubar/braubar-pi/archive/master.zip

and unzip it e.g. to your home folder

unzip master.zip && rm master.zip && cd braubar-pi-master

to install the needed python requirements run as root

pip3 install -r requirements.txt

Install and configure dnsmasq

If there is a DHCP Server already running then please change IP settings and ignore this section.

First install dnsmasq on your system.

apt-get install dnsmasq

There is a preconfigured file for dnsmasq for Braubar. $BRAUBAR_HOME/install/dnsmasq.conf

mv /etc/dnsmasq.conf /etc/dnsmasq.conf.bak
ln -s /home/pi/braubar-pi-master/install/dnsmasq.conf /etc/dnsmasq.conf

Config Braubar start with Supervisor

Adjust paths to your configuration!

Create link to config in /etc/supervisor/conf.d/braubar.conf

ln -s $BRAUBAR_HOME/install/braubar.conf /etc/supervisor/conf.d/braubar.conf

[program:braubar]
command=/home/pi/braubar-pi-master/bin/braubar
directory=/home/pi/braubar-pi-master/bin
loglevel=warning
process_name=%(program_name)s
autostart=true
autorestart=unexpected
startsecs=10
startretries=3
stopasgroup=true
redirect_stderr=false
stdout_logfile=/home/pi/braubar-pi-master/log/braubar.log
stdout_logfile_maxbytes=1MB
stdout_logfile_backups=10
stdout_capture_maxbytes=1MB
stdout_events_enabled=false
stderr_logfile=/home/pi/braubar-pi-master/log/braubar.err
stderr_logfile_maxbytes=1MB
stderr_logfile_backups=10
stderr_capture_maxbytes=1MB
stderr_events_enabled=false
serverurl=AUTO

reread and restart supervisr and show status supervisorctl reread && supervisorctl reload && supervisorctl status

control log in /var/log/supervisor/supervisor.log

Arduino

In Braubar the Arduino acts as a temperature sensor.

Geting started

It is required to have an running Arduino environment. Then you can either upload the program to your Arduino within Arduino Studio or with the shipped Makefile, which is recommended. Before running Make you shoud have a look at the Makefile to ensuhre your Serial Port is mapped to the right device. To upload the compiled program to your Arduino run:

make clean && make && make upload

After running successfully it will request an IP from your DHCP server and start sending broadcast packages all over your local network. To avoid broadcasting, please enter the desired IP for IPAddress server in braubar_temp.ino file. Also it is possible to change the port from 50505 to your wish.

Functionality

It sends a package every second with the current temperature value, the id of the sensor and a start and end sequence consistion of 0xF0FF and a end sequence with the same sync bits.