![]() The COM-port software interface provides a way for PCs to exchange data with devices for any purpose. The device uses standard USB class drivers included with Windows and other OSes. This article will show how to design and program a USB virtual COM-port device using a general-purpose microcontroller with an embedded or external USB controller. NET's SerialPort class or other COM-port APIs or libraries. But with the right firmware, a USB device can appear as a virtual COM port that applications can access using. Recent PCs often skip RS-232 in favor of USB. The traditional COM port on a PC is an RS-232 serial port on a motherboard or expansion card. ![]() This article originally appeared in Circuit Celler.ĬOM ports have long provided a convenient way for PCs and embedded systems to exchange information. ![]() Create a USB Virtual COM Port Create a USB Virtual COM Port
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