the COM port of USB GSM modem is not recognized automatically

1
votes

I have a D-Link USB GSM modem and I am developing an application for it using C# SerialPort class and AT commands. Everything, such as sending and receiving messages, works fine. However I have a problem with modem initialization. Each time I connect the modem to a USB port I have to run modem's own connection manager program called D-Link connection manager. Otherwise, neither computer's device manager nor hyperterminal do not recognize it and its COM port. I believe D-Link connection manager creates a virtual COM port for modem. I do not want that my application depends on D-Link connection manager all the time. Does anybody have a suggestion so I can recognize modem's USB COM port (virtual port) automatically? I appreciate your help beforehand.

Since D-Link connection manager cannot be used in Linux OS, this issue will be problematic if I try to use this modem on Linux systems.

PS: This problem does not exist when I use older GSM modems with serial port connection.

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serial-portgsmmodemvirtual-serial-port
Have you tried looking in Windows Device manager to see what is happening when you plug the modem in and run this connection manager? – user1725145
Yes I did. When I connect the modem noting happens in Device Manager; but when I run the connection manager the modem icon plus its COM port will appear. – Yasser Mohseni

1 Answers

1
votes

You should be able to see such a virtual COM port in the device manager. I don't really know about D-Link modems, but I know that for USB connected barcode scanners (Symbol/Motorola or Datalogic), there are special virtual COM port drivers that create such a COM port so that USB connected scanners can be accessed through a COM port.

While this may not be comfortable, it is still necessary, because USB connected devices can not be accessed through COM ports by default.