An sketch for bench testing an arduino board. Testing is done via USB serial interface. The user is prompted for a test to run, such as testing DIO capabilities, ADC, etc. Planned features include more complex tests such as sending/receiving I2C/SPI data. This opens up the possibility of using this sketch as a general debugging tool, as the arduino could be made to send arbitrary I2C/SPI data to another system which is being debugged.