Serial to USB converter with GPS error

I recently created a program to log GPS information from a Garmin GPS18 antenna. The GPS uses a serial port on the docking station of my laptop for communication and USB for power. In order to deploy this application to a field location, I need to use a USB to Serial converter since the laptop itself does not have a serial port. The program runs fine using the dockingstation and it's serial port, however, when trying to use the USB to Serial converter it routinely errors out. The typical error is -1073807523, "VISA Read in GPS18_read.vi". I have also seen an error that read something like "Property node (argument 8) in VISA configure Serial Port (Instr).via - > GPS18_read.vi".
For troubleshooting, I have used "PuTTYtel" and verified that I can read the GPS18 out via the USB to Serial converter, without problems. Serial settings used are 19200 baud, 8 data bits, 1 stop bit, no parity, and no flow control. But, when trying to read using the LabView vi, it throws the previously mentioned errors. Any suggestions would be appreciated!
Solved!
Go to Solution.

Maybe a power issue? How are you connecting the two USB devices to the laptop? A USB device can be high power or low power. If you connect a passive style 'slim' laptop USB hub and connect the two devices to that, you may be power limited on the port.
Also, is the laptop running on battery? Power conservation modes may be trying to shut down your USB port...
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Serial to USB converter with GPS error

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