Below is a minimal step by step guide on installing CodeIgniter 2.1.4. The assumptions are that your using either Ubuntu or Debian, with a GIT + Apache + PHP + MySQL stack available. Step 1: Clone the CodeIgniter repository CodeIgniter is available either as a compressed tarball, or as a git repository. The latter is […]
In Part 1 of Web Application Performance Testing using Apache JMeter I wrote about how to install Apache JMeter and create a test. In this part I am writing about how to monitor server resources, using the PerfMonAgent Server Agent and the PerfMon Metrics Collector Listener plugin. These are particularly useful when trying to measure the impact over […]
Playing with my Raspberry PI and its GPIO over the weekend it occurred to me I would be able to control it in real time from a browser, using Socket.IO and pi-gpio. Here is a link to my Github code for doing so: https://github.com/fgheorghe/jsGPIO. The JSGPIOServer module creates an HTTP server handling Socket.IO events, producing […]
This entry documents how to install and configure the WSO2 API Manager, on Debian Linux 7. WSO2 API Manager is a tool for publishing APIs, with features such as: API Store Publishing and Governing API API Traffic routing Developer Community Govern Complete API Lifecycle Performance monitoring Further details available on the vendor’s website, http://wso2.com/products/api-manager/. A good […]
Here is an example of how to create type safe lists in PHP 7. Influenced by Java Generics, this approach lets your code guarantee the type of data you can store and retrieve from arrays. To change the type of objects stored in the list, update the second line of code. To change it to […]
Short note on how to install PHP Ncurses on Debian. This post assumes root level access. Install pear and the and ncurses development packages: apt-get update apt-get install -y php-pear apt-get install -y php5-dev apt-get install -y ncurses-dev apt-get install -y libncursesw5-dev Install PHP ncurses (hit return on any prompts): sudo pecl install ncurses Edit […]
Having played with the Raspberry PI GPIO interface for over a year, I thought I should explore options for a faster CPU/RAM and a different architecture to enable quicker device control and more complex software. The fastest option for controlling is using a standard PC and a standard CPU architecture. After some research, I found […]
Tiny C program to loop a Micro Servo SG 90 from 0 to 180 degrees and back. Requires servoblaster. #include #include #include #define SERVOBLASTER_DEVICE_PATH “/dev/servoblaster” #define SERVOBLASTER_PIN 2 #define MIN 60 #define MAX 250 #define STEP_INTERVAL_MILLISECONDS 960
Here is a short code snippet for relatively low latency video streaming using a Raspberry PI camera via the HTTP protocol, and viewing it in VLC. This post is inspired by a ‘netcat‘ approach found here. Code for creating an HTTP Video Server: var spawn = require(‘child_process’).spawn, child = spawn(‘/opt/vc/bin/raspivid’, [‘-t’, ‘0’, ‘-w’, ‘300’, ‘-h’, […]
Previously, an entry was written on how to Install Capistrano 3, on Debian. Here is an alternate, quicker way, of installing Capistrano using RVM, on any flavour of Linux – authored by Omar Tamer. This tutorial requires curl, and root level privileges. First stage is to install the ruby version manager, RVM: Step 1: Download […]