Amazon.com: Wishiot Thumb Joystick Module Dual Axis Sensor Game Controller Sensor Joystick Breakout Module Compatible with Arduino PS2 Raspberry Pi (10) : Video Games
Interfacing Joystick with Arduino
Using joystick module with Arduino - Hackster.io
Arduino basics; wiring up the joystick
In-Depth: How 2-Axis Joystick Works? Interface with Arduino & Processing