A project based on C++ that uses a Raspberry Pi 4B Rev. 1.2 board to move a micro servo with a joystick. For GPIO pin mapping, I used WiringPi (Made by Gordon Henderson under GNU-LGPL) to simplify. Link: http://wiringpi.com/

WiringPi Note: The author has discontinued public releases of WiringPi. The last update was 2.52 for the Raspberry Pi 4B. Although WiringPi is preinstalled on Raspbian systems, the code for installation is as follows:

sudo apt-get install wiringpi

Use:

gpio -v

to check if your version is 2.52.

For more details visit http://wiringpi.com/download-and-install/

To upgrade, visit http://wiringpi.com/wiringpi-updated-to-2-52-for-the-raspberry-pi-4b/

A C library for the ADC Device is required. It needs to be installed through the terminal. The folder is included in the repository. Opening a terminal in the folder location or using "cd" to access it, run the code to build:

sudo bash
sh ./build.sh 

Hardware components used:

• (1) 5 pin Joystick
• (1) Tower Pro Micro Servo 9g
• (1) ADC Module (PCF8591)
• (3) 10K Resistors
• (1) Breadboard
• (21) Jumper Cables
• Raspberry Pi 4B Rev. 1.2

When compiling the code, run the following commands in terminal at the location of the file:

sudo bash
g++ ServoJoystick.cpp -o ServoJoystick -lwiringPi -lADCDevice
./ServoJoystick

This project was possible through an electronics kit I purchased from Freenove that provided me with all of the components I used. If interested, it is the "Freenove Ultrasonic Starter Kit for Raspberry Pi" (FNK0024).