In my experience, remote controlled toys and robot arms are best controlled using a haptic device, such as a joysticks. But how can one write a program, that makes use of a joystick? For only 5€ I got an old but fancy-looking Saitek joystick on the flee market. It registers under Linux without problems. Now what?
Quick googling turned up this site. So I started by running jstest-gtk:
The first thing to do, is to select the joystick, click „Properties“ and perform a calibration:
Wow, after the calibration the joystick already appears usable: