This library allows you to make the ESP32 act as a Bluetooth keyboard and mouse with Arduino.
And support Media Key. This library is  the fork of Blackketter's ESP-BLE-Compo.
But  Blackketter's version can not use Media Key.
- Read Numlock/Capslock/Scrolllock state
 - Add gamepad support
 - Auto-instantiate Keyboard, Mouse objects (like the standard Arduino libraries)
 - Optimize so that only needed classes get created for BLE.
 
- (Make sure you can use the ESP32 with the Arduino IDE. Instructions can be found here.)
 - Download the latest release of this library from the release page.
 - In the Arduino IDE go to "Sketch" -> "Include Library" -> "Add .ZIP Library..." and select the file you just downloaded.
 - You can now go to "File" -> "Examples" -> "ESP32 BLE Combo" and select any of the examples to get started.
 
#include <BleCombo.h>
void setup() {
  Serial.begin(115200);
  Serial.println("Starting work!");
  Keyboard.begin();
  Mouse.begin();
}
void loop() {
  if(Keyboard.isConnected()) {
    Serial.println("Sending 'Hello world'");
    Keyboard.println("Hello World");
    Serial.println("Sending Enter key...");
    Keyboard.write(KEY_RETURN);
    Serial.println("Sending Play/Pause media key...");
    Keyboard.write(KEY_MEDIA_PLAY_PAUSE);
    Serial.println("Sending Ctrl+Alt+Delete...");
    Keyboard.press(KEY_LEFT_CTRL);
    Keyboard.press(KEY_LEFT_ALT);
    Keyboard.press(KEY_DELETE);
    delay(100);
    Keyboard.releaseAll();
    Serial.println("Move mouse pointer up");
    Mouse.move(0,-10);
    
    Serial.println("Scroll Down");
    Mouse.move(0,0,-1);
    Serial.println("Left click");
    Mouse.click(MOUSE_LEFT);
  }
  
  Serial.println("Waiting 2 seconds...");
  delay(2000);
}
This is original fork of @T-kV's excellent ESP32-BLE-Mouse and ESP32-BLE-Keyboard libraries.
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And fork of ESP-BLE-Compo.
But Blackketter's ESP-BLE-Compo version can not use Media Key.