Quick tutorial step-by-step for streaming live video from your Raspberry 3 using the PI Camera to a web browser. Using Motion to deliver the stream to the browser which has a near 5 second latency. Might want to use something like Gstreamer for better performance. Downside with Gstreamer is that […]
Increasing the size of your file system in Ubuntu without loosing the partition data. I did this on a vmware slice. It’s a bit freaky as you are actually deleting the primary partition in the operating system before you can grow it. Start with increasing the VM’s underlying disk space […]
Use Apache Rewrite and htaccess to get Apache rewrite to work and make your urls pretty on Ubuntu. Lets assume that your website root directory is located in /var/www/headstation. Say you want to make this url: wiki.php?tag=home look like: /wiki/home In the website root doc directory, add a .htaccess file […]
DualNicRouting Routing for dual nics in a typical DMZ ensuring that any traffic into a network card, routes out on the same card remembering that /etc/network/interfaces can only have a single gateway configured. Example interface file below with only 1 default gateway. # The loopback network interface auto lo iface […]
SSH into your Ubuntu MySql server and backup the headstation database to headstation_20141207.sql with: mysqldump -u root -p headstation > headstation_20141207.sql Restore with: mysql -u root -p headstation < headstation_20141207.sql Log into mysql and create new db and apply root permissions before you can restore: mysql -u root -p Create […]
Quick steps for installing ModPython on your Ubuntu server and allowing a web browser to browse a python script and return content. Installation Open terminal and type the following command: $ sudo apt-get update $ sudo apt-get install libapache2-mod-python libapache2-mod-python-doc Configure mod_python You need to create directory to host your […]
Quick steps for implementing php unit testing on Ubuntu Apache. Unit test frame work is by https://phpunit.de/ by Sebastian Bergmann. All detailed documentation on that site. Installation is easy by: apt-get update apt-get install phpunit Test the version by: phpunit –version Create a class and some tests for the class. […]
Quick steps to installing with either USB Wifi dongle or with the RPI3 internal wifi. apt-get update apt-get install wirless-tools Run iwconfig to list all connected wireless devices and find which one you want to configure. Mine was wlan0: iwconfig Add device name to /etc/network/interfaces: auto wlan0 iface wlan0 inet […]
Configure Usb GPS Fairly easy to install and get working. Making the start up processes work is the slightly tricky part. I had a Prolific GPS with Usb cable attached. I am doing this on a Raspberry Pi with Rasbian installed. First, check if you have your GPS plugged in […]
Super basic installation of Postgres for development. This installation assumes latest Ubuntu LTS as of October 2014 which is Trusty 14.04. Install Postgres 9.3 through apt-get: apt-get install postgresql-9.3 Set postgress password on operating system as root using passwd cmd and then su to postgres and change in database schema: […]
PostGIS is a spatial database extender for the PostgreSQL Open Source Object-Relational database management system. pgRouting extends the PostGIS/PostgreSQL geospatial database to provide geo-spatial routing and other network analysis functionality. We use these alot as the backend for any web or mobile application. This installation assumes latest Ubuntu LTS as […]
Quick installation of Apache, PHP and WordPress on Ubuntu LTS. I suggest the manual installation of WordPress as it allows for most recent version. Apache and PHP apt-get install apache2 php5 php5-gd php5-mysql Installing WordPress This is a manual install process of WordPress which makes it more functional for clients. […]
Communicate with Raspberry GPIO over UDP and TCP Sockets. Explores using UDP as push stream of changes to inputs and outputs on the Raspberry. TCP Connection enables the remote client to control output state changes from the client software. Code on GIT Hub: https://github.com/matzpersson/raspberry-gpio-sockets.git Companion Swift app on https://github.com/matzpersson/raspberry-swift-gpio-remote.git Installation […]
OpenOPC for Python is a free, open source OPC (OLE for Process Control) toolkit designed for use with the popular Python programming language created by Barry Barnreiter on Windows environments. More information on http://openopc.sourceforge.net/about.html I had a few issues getting it to work. Mostly related to the settings on the […]
The OPC Rest API application is developed in Python and used in conjunction with OpenOPC to connect and report back lists, tags and properties from OPC Servers. The user sends a HTTP API call to the configured server with command parameters and returns a JSON result. It is a http […]
This will enable any *.mp4 videos to be streamed directly rather than loading all the movie prior to playback using Apache on Ubuntu server. Kick installation off with: apt-get update apt-get install apache2-threaded-dev Download the source of the H264 Streaming Module for Apache. cd / mkdir tmp cd /tmp/ wget […]
Quick tutorial for setting up Raspberry as Digital Signage and stream a video to it. It includes setup of a customised splash screen during boot, configuration of a light Windows Manager on Linux and auto-launch of Chrome browser to browse the vide. Kick off installation with: apt-get update apt-get install […]
Quick howto for installing and compiling the OpenAlpr project on a Raspberry Pi. Raspberry needs to have atleast 64bit Ubuntu Trusty for this to work. First, install the prerequisites. sudo apt-get install libopencv-dev libtesseract-dev git cmake build-essential libleptonica-dev sudo apt-get install liblog4cplus-dev libcurl3-dev sudo apt-get install beanstalkd Next, head to […]
