This is an integrated USB-to-Serial (RS232) converter based on Prolific PL2303HX chip. A low-cost and convenient tool for debugging and serial communication. Compatible with Adafruit’s same product.

• Cable length: 3 feet (1 meter).
• Wiring: Red->+5V supply, Black->Ground, Green->TX, White->RX. Connect TX to the RXD pin of your target device (such as microcontroller), RX to the your device’s TXD, and ground to ground. Usually you do not need to connect the +5V supply pin, as long as your target device is powered.
• No driver needed on Linux. Windows and Mac drivers can be downloaded here. The device will report as a Serial COM port. You can then use Arduino’s serial monitor, putty, gtkterm, or any of your favorite serial monitors to talk to it.