CH340G USB serial converter 3.3V / 5V. This chip is the standard USB to serial converter used on compatible Arduino boards. When ever you have a serial port with TTL logic level, you can use this little adapter to make it “USB compatible”.
It works, for example, perfectly with our USB-less Canaduino Uno Bone modules, or with the Bread Board Buddy module.
Just connect RX/TX to the TX/RX pins on the Arduino controller.
Windows 32/64 bit and Mac OS X (10.9 or higher) driver are available for download.