Communicating between the servo controller and a PC
Now that the servo controller is connected ,you can use some software provided by Pololu to control the servos. This is done just to make sure you have everything hooked up correctly, and to set the controller's setting. Unfortunately, the software won't run on the Raspberry Pi; you'll need to do this using your personal computer. First, download the Pololu Software from www.pololu.com/docs/0J40/3.a and install it according to the instructions on the website.
Once it is installed, run the software, and you should see this screen:
You will first need to change the configuration on Serial Settings ...
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