Grosan Flaviu Gheorghe (Page 2)

Grosan Flaviu Gheorghe

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Part 2: Real-Time Browser to Browser Communication, Adding Application Specific Events

In the previous part of this article, I wrote an introduction to Node.js and Socket.Io; presenting a basic server and client communication model. In this entry I am writing an extension to the Server and Client JavaScript objects, to allow for Application Specific Events. This provides the basic

Installing CodeIgniter - Step by step guide

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

Web Application Performance Testing using Apache JMeter, Part 2: Monitor Server Resources

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

Control your Raspberry PI GPIO in Real Time via the Browser using NodeJS, Socket.IO and pi-gpio

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

Service Oriented Architecture: Install and configure WSO2 API Manager on Debian

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

PHP 7 Type Safe Arrays

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

How to install PHP Ncurses on Debian

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)

Numato Lab 32 Channel USB Gpio NodeJS Module

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

Micro Servo SG 90 - 0 to 180 Degrees Loop

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

Node.JS Low Latency Rapsberry PI Camera Streaming via HTTP and VLC

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'