Raspberry Pi as an SMS Gateway

Today was one of those days where I thought I'd find something useful for my Raspberry Pi to do, rather than sit in a box unloved.

I was thinking how we send a lot of monitoring notifications as emails and how bad email is as a single method notification, especially if what you are monitoring is your connection to the internet... Internet connection goes down, how do you send the notification out?

I had a 3G USB dongle also sitting around doing nothing, so as a test I stuck a Pay+Go simcard in, made sure it had some credit and connected it to my Raspberry Pi.

This is how I got it to send an SMS (Will likely expand this post as I add features).