Prolific Usb To Serial Driver !free!

For standard installations, you can download drivers from these reliable sources:

Here’s a concise guide to the (PL2303), covering installation, common issues, and fixes. prolific usb to serial driver

Note: If you choose a port number that says "(in use)", Windows will warn you, but usually allows the change. Ensure the device actually using that port is disconnected first. For standard installations, you can download drivers from

Since the newer drivers reject old chips, the solution is to install an older driver that doesn't have this check mechanism. Since the newer drivers reject old chips, the

Several years ago, Prolific released their PL2303HXD chip. Prior to this, they manufactured the PL2303HXA. The HXA reached "End of Life" (EOL), meaning Prolific stopped manufacturing it.

After install, open , Tera Term , or Arduino IDE → select the COM port → baud rate 9600/115200 → connect. Short TX to RX pins (loopback) – typed characters should echo.