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There are many devices that use infrared remote controls - TV's, DVD players, cameras, power sockets. So getting a Raspberry Pi to be able to send remote control signals opens up many possibilities for projects. Combining the GPIO pins with a web server on the Raspberry Pi means that we can create a web UI to control these devices. Installing LIRC on the Raspberry Pi One of the great things about running a Linux operating system on the Raspberry Pi is that it provides access to a wealth of software projects that can run on the device. One of these is the Linux Infrared Remote Control (LIRC) project that provides a way of receiving and transmitting IR signals from many remote controls. LIRC provides a method of recording signals from a remote control and storing them in a configuration file, so that they can be sent directly from the Raspberry Pi. Installing LIRC on the Raspberry Pi needs the latest firmware to be on the Raspberry Pi. One of the clearest guides I've fou...

The AdaFruit website has an excellent tutorial on connecting a 16x2 LCD display to a Raspberry Pi. That's great, but what if you want to be able to send messages to the display from a web application? In the previous tutorial , we saw how to create a basic Python-based web application using the Flask framework. Let's create a new web application that will interact with the Raspberry Pi. The Goal Using Flask, we will create a simple web application with with a form that allow a user to send a message to the Raspberry Pi using a web browser. This will allow us to control the Raspberry Pi from a PC, tablet or smart phone. When the form is submitted, it will send the message to the LCD via the device's GPIO ports. All the code, including the web application, is in Python and HTML... with some HTML and JQuery Mobile thrown in (just because we can). To the Code We'll be using the same circuit and the AdaFruit_CharLCD.py library, so make sure you have everythin...

One of the great features of the Rev. B RaspberryPi is the built-in Ethernet connection, which opens up many possibilities for web-connected projects. This enables this small device to be able to operate as a web server, ideal for running custom web applications. Since the RaspberryPi can also be connected to a host of other sensors and devices through the GPIO ports, this opens up the possibility of creating web-controlled devices. Choosing a Web Framework Since Python is the main programming language for controlling the RaspberryPi, I thought that the ideal web server for the device is a Python-based web framework. This means that the code for controlling the RaspberryPi's GPIO could be integrated right into the code for the web server. There are a number of Python web frameworks available - so that run some heavy-weight Internet websites. However, the ideal solution is a web framework that is: Easy to install Quick to learn Simple to write Fast and lightweight Even...