Some usb devices have their own drivers and create a virtual serial port which can easily be written to and read from using mscomm (there are many examples here on the UT). Also, bluetooth USB devices do this. What virtual serial port does your device create? It must be a serial port for the MSCOMM control to read the data coming in the port. Once you determine that, look at the many messages regarding using the MSCOMM control here and in downloads.

Try this and see if you capture anything as a test:

Re: Mscomm control Thread #1178407 Message #1178608


>I am writing an application to read data from a GPS logging device using the MSCOMM control. All communication will be initiated by the FoxPro applicaiton which will send a command string then receive and parse data sent from the device.
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>Everything works fine if I type the commands in the command window, but if I transfer the same series of commands to a prg, I cannot capture the input. I stepped through the code and can see the input property flash then it is cleared before the next line of code.
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>I also tried using the MSCOMM ActiveX control (with RThreshold set to 1), but the OnComm event does not fire.
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>Is there anything I can do to capture data sent from the device?
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>Thanks in advance for any advice.