Android Mode - Serial Communication - Andruino - Processing 2.x and 3.x Forum
microcontroller - USB communication between Android phone and MCU while continuously charging the phone - Electrical Engineering Stack Exchange
ProjectProto: Android-Arduino Communication via USB OTG
Android+Arduino serial(USB) communication. Source code+APP. Robot car project#11 - YouTube
Make the USB Connection on Your Android Phone Default to File Transfer Mode « Android :: Gadget Hacks
USB Communication between Android and Arduino - The Engineering Projects
CQRobot RS485 or RS422 to USB Serial Communication Port Converter Adapter Cable. with FTDI FT232 Chipset, 300-921600bps Rate, 2.2 Meters, for Win7 / Win8 / Win10, ME, Linux, MAC, SCM, Android, etc. :
Make the USB Connection on Your Android Phone Default to File Transfer Mode « Android :: Gadget Hacks