How to Emulate an Xbox Controller with Arduino (XInput) - Parts Not Included
PS2 Remote controller Bluetooth 4.0 module with 51/STM32/Arduino 3 in 1 version controller for Open source toy car robot|tank robot|controller boardcontrol system - AliExpress
Bluetooth HID gamepad using HC-05 module - mitxela.com | Arduino, Bluetooth, Cheap electronics
Arduino] Bluetooth Controller. Communicate with an Arduino using the… | by Alex M. Smith | Medium
Arduino Bluetooth controller (tutorial in comments) : arduino
Arduino Customized Bluetooth Controller - Hackster.io