Exercises

You could enhance the system in many ways. Here are some suggestions for building further:

1. In the manual_drive.py file, the handle_instruction function uses a bunch of if statements to handle the instruction. If this list of command handlers exceeds five, you could improve it by using a dictionary (such as menu_modes) and then calling different handler methods.
2. Could you change the touch interface into two circular pads—perhaps so the left controls motor movement and the right changes the camera position?
3. What about creating phone-friendly interfaces for other behaviors to control their parameters?
4. You could embellish the CSS by adding round buttons or putting spacing between the buttons.
5. The menu still uses text buttons. Could you find a way to associate an image with each behavior and make a button grid?
6. Adding a Shutdown menu button will mean you could more gracefully shut down the Pi, where it would start the sudo poweroff command.
...