UsbUart

No longer supported. It might or might not work for your use case.

UsbUart is small (32x20 mm / 1.3x0.8 inch)) USB to 5V TTL UART converter. It has USB plug on one side and female 0.1" header connector on other.

Source

Clone repository:

git clone https://github.com/Medo64/UsbUart.git