Hello !
Could you please tell me, is SMS the only option you have on the GPS devices attached to those vehicles? Or can they also be configured to send an http request to some URL ? Or do you already have that system in place, receiving the SMS-es and storing them into a database ? I recently complete a very similar project, you can see it in my profile and I can show a demo (and it wasn't my first of this type) ... The rest of the project, apart from receiving and storing the data somewhere, is actually not a big deal, but I need to know about this first part, where data gathering occurs ... So maybe you could tell me more ?
Regards,
Dragos