Follow the prompts to extract and run the dmg file.
USB to Serial Support Mac How to Install the Driver: Part # SW-1301 and other Prolific based adapters: Very useful USB driver for Windows 98 based computer. If you are having problems with the USB-to-Serial Adapter in Windows that this page does not address, please contact us at or call (800)709-1345 between 7 AM - 6 PM MST. You may have to run the software that came with your device to make it rescan the COM ports.
For more information, try checking out the Hardware Test for the serial basic hookup guide. If you are using the breakout board, you can add a jumper between the Tx and Rx to try and echo a character in a terminal program. Notice that the device will show up as being on the same COM port that it was before (i.e., COM5), but will show up on the new port if you close the Device Manager and open it again. You can also verify if the USB-to-serial converter is working by doing a serial loop back test or echo test. Pull down the scrollbar on the bottom, left side and select COM 1, 2, 3 or 4 (NOTE: Choose one that does not say "in use" next to it).Right click on the "Prolific USB to Serial Port" and click on Properties.How do I change the COM port on my USB to Serial adapter? Double click LPT and COM ports then locate the Prolific USB to Serial Driver and right-click it so you can select Update Driver. Remove and Re-Install all Universal Serial Bus Controllers & USB Devices.
Right-click on your PC Start button and open Device Manager. USB device driver not successfully installed or Windows cannot install USB. If the adapter is installed on COM5, a device with such a limitation will not work until the COM port is reassigned to COM1 - COM4. To correct the error, you will have to download the driver again by following these steps. would not work with a USB to Serial adapter when everything appears to have installed fine is that some devices will only scan a limited number of COM ports.įor instance, it is very common for a PDA to have a limitation of scanning the first four (or sometimes two) COM ports. The most common reason that a device such as a PDA, GPS, cell phone, etc. Troubleshooting The driver is installed properly, but the device is not working: