OK, fessing up right up front: I’m a “noob”, so please be patient with the following really stupid questions:
- I see T-mobile has unlocked GSM cards for free, but I assume that won’t do me any good if I don’t have a T-mobile account, or is there a way to just communicate locally between GPRS shield and a nearby phone?
- Is the simple solution here to buy an unlocked GSM with some account that has a limited number of hours or whatever (I don’t want to add an entire new “phone” to my existing plan while I’m just experimenting)
- In the GPRS shield Wiki it talks about installing sscom32E. My guess is that this is simply a serial line terminal program and I can just use Zmodem instead, is this correct, or is there something special about sscom32e that makes it better for interacting with the GPRS?
If I can get past these basics, I am really interested in building the phone!!
I really like your comment about the size thing too, maybe skip the pcb and use point to point wiring and some really old-fashioned enclosure. 