This is a software/hardware development tool that allows the user to send strings on an interface (parallel,serial, network or other), specified in hexadecimal or strings or a combination of these. The strings can be retrieved/stored from/to a file.
This is both hardware (PIC microcontroller) and software (windows .exe) project.
You can use it to test I2C, SPI,1WIRE, servo with a simple script editor that runs on windows PC and communicate over USB with PIC and your test circuit.