It displays the Hardware Serial output of the Arduino to AndroidI made I wanted to easily debug at the time of operation and DevelopmentThere is no difficult configuration is requiredAndroid devices must correspond to the USB Host APInd to the USB Host API(Im sorry if it does not work :p )Also, the power supply of Android may not be enough voltage, in which case please supply power to Arduino.Setting* Baud rate* Automatic scrolling* Do not sleep the screenDevelopment environment* Arduino Uno* Arduino Nano* GalaxyS4* GalaxyS6 Edge