AT commands
This week, I spent a few days trying to write a program that can receive and send SMS using the D-LINK DWM-156 3.75G HSUPA USB Modem I bought from Challenger at $79.00. Tried out GSMComm and it is a great library, but sadly, the library is not compatible with my lousy D-LINK modem. Yeah, quite unhappy with this modem. Since I bought it a few days ago, its performance has been quite below on par; I often got a 'NO SIM CARD' message when my SIM card was evidently never removed from the adapter all along. Also, when I tried to flash my firmware, the installation tool adamantly REFUSED to recognise my device. In desperation, I called the D-LINK technical support. After spending nearly an hour with 4 different support staff, my conclusion is that the D-LINK hotline was just manned by some staff who would ask you for a few keywords that they would key in their knowledge base, and if those keywords were found in their search, they just repeat the instructions from what they