Bluetooth communication between two 8-bit AVR mega MCU's and transfer data

The project needs two firmware for a transmitter and receiver system and simulate the same on hardware Refer to the attached general schema and the components used Transmitter module To the right on the jpeg has an SD card that contains folders with txt and bmp files inside them, a MPU6050 gyro module and HC05. Gyromodule replaces the conventional 4 switch buttons, instead it uses the right, left, forward and back tilt to activate the functions of 4 buttons to control scroll up, scroll down, enter/open and exit/close functions. The data is then transmitted to the receiver module Receiver Module The list of folders, files, txt and bmp files display will be received by the paired HC05 and displayed on the receiver module