Ok, i've bought a gsm900 in alexan, and what i bought was a gsm shield thinking that it is really just the same only that shield can be placed directly in an arduino. The problem is that, im trying to do a computer system that utilizes gsm module to automatically send sms notifs, but the gsm shield does not have rs 232 port like some of the gsm module available in the internet. And Im thinking would it be possible to connect my gsm shield to an arduino then connect the arduino to the pc, would the at commands coming from my computer system be able to pass through the arduino and send it to the gsm? Or if it is possible how should i do the programming? Im using visual studio 2012 and c# as my language.
Ps. My gsm shield have small male pins namely rx tx gnd and i cant remember the other one, (my gsm shield was with my friend at this time). And i have read that rs 232 are composed of that pins. Correct me if im wrong, can i just buy/creata/modify an rs 232 cable so it can be connected through those pins? I still have very limited knowloedge bout gsm.