His code listens for serial commands and manipulates the motors accordingly. He wrote a Python script using pyserial which talks to the Arduino.

Serial Servo HATs and Raspberry Pi, Arduino expansion boards 3:15 pm October 2, 2023 By Julian Horsey While building robotics projects, the importance of controllers and motors cannot be overstated.

A bare servo wouldn’t be much fun, so [Outaspaceman] connected a tentacle and a small Swiss army knife. Yes, a knife. The tentacle in question is designed to be a finger puppet.

This means that the servos stops and start very suddenly, moving as fast as they can between positions. In this video I'm going to show you two lines of very simple code to make things smoother.