We're testing a vending machine and need to monitor the pressure switches (these are just simple switches, 4 of them). These triggers would simply be high/low inputs on the GPIO's. We'd like to use a raspberry pi to take the triggers (as they occur) and then send the info via SMS with the Pi's MAC ID. This will allow us to see if the machine has overpressured. We already have the 3G routers so just need the raspberry pi code to monitor the pressure switches and send SMS or email when they're triggered. If this project goes well, I have at least 3 other projects that will be much more challenging and with bigger budgets. This is a guaranteed project for the right applicant. I have also posted this project on Freelancer. Good luck.