/*
 Bluetooth BLE Keyboard
 Use an ESP32 as Bluetooth keyboard. The ESP is connected to the sender PC via USB and sends keystrokes by BLE.
  
 Minicom as Key sender:
  minicom -D /dev/ttyUSB0
 
 Hardware:
 ESP32 WROOM  

 Framework
 Arduino ESP32 
 
 Libraries needed:
 https://github.com/HijelHub/HijelHID_BLEKeyboard
 https://github.com/h2zero/NimBLE-Arduino

 Inspired from
 https://class.academany.org/futures/cybersecurity/2026/labs/isafjordur/students/hanndoddi/cyber-road/lapboard/

 2026-08-13 initial version, mchris

*/

#include <HijelHID_BLEKeyboard.h>

HijelHID_BLEKeyboard keyboard;

void setup()
{
    Serial.begin(115200);

    keyboard.begin();

    Serial.println("BLE Keyboard gestartet");
}

void loop()
{
    if (keyboard.isPaired())
    {
        if(Serial.available())
        {
          char c;
          c=Serial.read();
          Serial.write(c); // echo
          keyboard.print(c);
        }
    }

    delay(10);
}