JoyStick Shield Expansion Board

- Add RF nRF24L01 interface
- Add Nokia 5110 LCD interface, which is very convenient for game development.
- Add the interface of the bluetooth module to facilitate bluetooth wireless serial communication.
- Add I2C communication interface to facilitate connection of I2C devices
- At the same time, the JoyStick Shield has 1 PS2 with button cross rocker, 4 round buttons and 2 small buttons. An input extension for the joystick and buttons is provided for the .
- The onboard switch can be switched between 3.3V and 5V.
This module can be used on other 3.3V microcontroller platforms such as STM32