USB Host API may be required on the device — this isn't the same as USB peripheral or thumb drive support. Author has tested CDC-ACM with Arduino UNO, MEGA, mbed. When you connect a CDC-ACM device to Android, please select Menu -> Open Device. You can connect Android to Arduino UNO; if you have an FTDI USB-Serial adapter(FT232RL), any microcomputers can be connected to Android by using this application. * supports CDC-ACM protocol(Arduino, mbed, PSoC etc.)(beta) * supports FTDI chips * Baud rate (1200 - 115200 bps) * Data bits, Parity Check, Stop bits, flow control, break options(not support in CDC-ACM) * Display in character/decimal/hex notation. * send a result by e-mail * send/receive Linefeed code(CR/LF/CR+LF) * font size option Connection Examples: * Android — Arduino UNO * Android — USB-Serial Adapter — Microcomputer * USB-Serial adapter * Sparkfun — FTDI Basic Breakout