Now that you can control your servos by using a basic command-line program, let's control them by programming movement in Python. In this section, you'll create a Python program that will let you talk to your servos a bit more intuitively. You'll issue commands that will tell a servo to go to a specific angle and it will go to that angle. You can then add a set of such commands to allow your robot to move forward, backward, or position the claw to any specific location.
Let's start with a simple program that will make your robot's servos turn 90 degrees; this will be somewhere close to the middle of the 180 degree range that you can work within. However, the center, maximum, and minimum values can vary from one servo to another, so you may need to calibrate them. To keep things simple, we will not cover this here. The following screenshot shows the code that is required for turning the servos:
The following is an explanation of the...