I know this is a stupid question, but what software do you use to send commands to the servo controller?
The software you use depends on what you are sending the commands from.
If you are using an embedded controller, you would have to write your software in whatever language you have for that device, such as C, BASIC, or assembly language.
If you are using a PC, you can use anything that can access the serial port, including Visual Basic and Java. We do not have any commercially available application made specifically to control servos to recommend, but anything that works with the Mini SSC II should work. However, such software would not give you access to our special features, such as individual speed and range control. You can take a look at one offering at http://www.brookshiresoftware.com.