![]() ![]() The USB cable's serial port is the same as if the PC had a serial port.Ī development board made to work with a PC should be a DCE device using a straight through cable and not requiring a null modem unless the designer is an idiot. The Programming port behaves like the Unos serial port in that the USB-to-Serial chip resets the board each time you open the serial monitor (or any other serial communication). IBM designed the PC to be a terminal to their big iron so made it a data terminal rather than data circuit-terminating equipment. It is most likely NOT a null modem cable. The PL2303 v408 Driver for Windows 11 problem was immediately solved when I attached a USB-C Adaptor with USB-A Ports to the same computer and connection of the same lead to the CELESTRON NEXSTAR+ & STARSENSE HAND CONTROLLERS. IF that doesn't work Win 10 does a good job of finding the drivers automatically. Try installing the Prolific Driver, the odds are good it will work. ![]() The serial port and Windows was 97% of my tech support issues. If you are having problems, its most very likely a driver issue. Most of these cables use the Prolific PL2303 chip. The title or the driver may give more information. It should be there if the driver is installed. Look in your System => Device Manager for Ports COM and LPT. Download File: PL2303ProlificDriverInstallerv1.12.0.zip. I have never seen a USB-SERIAL cable with null modem. This is the Prolific website read on the driver I installed: PL2303 Windows Driver Download. I manufactured a serial device for 20 years. ![]()
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