We’ve touched on this area before with the software layout and planning post but a lot has happened since then. This includes a GitHub repository where the latest version of our code can be found here. If you fancy having a read through it and reckon you have spotted any problems or know a better way of doing things then let us know and we’ll look into what you’ve spotted.
For the most part it is structured just like the diagram suggests we had it planned. A cool feature of the project is that the code is portable to other platforms, with just a simple rewrite of the lowest level classes – I2C and Quick2Wire. This means that you could implement the TwitALU on completely different hardware – for instance on the BeagleBone Black or even an ARM based mobile phone.
Here we go everyone, as promised, a video of the prototype system working from start to finish! I can recommend viewing it in HD at full screen with a bit of volume for effect. Obviously theres still the final system to create but this is the big turning point in functionality. Let us know what you think in the comments here or on YouTube we’re interested to know what you think of the system as much as the video at this stage.
That’s right It’s finally happened everyone, at 3:31pm on the 23rd July 2013 the following exchange took place on Twitter between myself and the TwitALU system!
Musical references aside my time has, since building as much of the actual system on breadboard as was needed and ordering PCBs, been spent mostly on finding a suitable Python 3 compatible Twitter library and getting it to work.
Job number 1 was finding one I liked the look of. Truth be told, this extended as far as some Googling and finding a list of popular libraries. Then choosing one that was actively maintained, worked with Python 3 and introduced the least interfering with data between me and the actual Twitter REST API 1.1.
Great, we now have a hardware ALU with its most important elements implemented on a metric tonne of breadboard. However, this awesome little machine is missing a crucial component – the interface to Twitter.
Enter the Raspberry Pi (RPi) – everybody’s favourite credit-card sized PC. As good as it is for playing back high-definition video and surfing the web with a connected monitor, its real power is harnessed when it’s used for a different, deeper purpose.