Micro USB Android to 1x Serial RS-232 ports with 1.8-m cable (FTDI) The Micro USB to RS-232 cable provides a serial RS-232 high performance UART 16C550 output. It is designed to extend a further serial output for tablet or smartphone with Android operating system via the Micro USB. For easy installation, the FTDI app can be downloaded free of charge to establish communication with the end device.