First of all, please make sure that your computer has the Silabs CP2102 chip serial port driver installed. Generally, when your computer is connected to the Internet, it will automatically recognize and automatically install the Silabs CP2102chip serial port driver. But in case your computer does not automatically install the serial port driver, you must install it manually. On how to install, you can search on google. Or refer to the following website:
https: //www. silabs. com/developers/usb-to-uart-bridge-vcp-drivers