Sending AT Command to a USB-Connected GPRS Modem in C#

Question

Can anyone give me a good direction or guide on how I can access a GPRS modem that is connected to a Usb Port. Should I make a USB driver for my program to send AT command to the modem? or Is like a router where in i can access it using an IP address? thanks

Answer 1

If its recognised by windows as a modem then the required drivers should automatically present it as a serial port, just like any other modem & you can communicate with it using its port name & System.IO.Ports.SerialPort. If you want to access the AT/GSM command set there are libraries like GSMComm.