//////   Name und Passwort des   HC-05  Bluetooth-Moduls aendern   ///////////
//
//You can send  AT Commands to the HC-05 from the Arduino IDE Serial Monitor while the Arduino is running the attached Arduino program.
//
//    WIRING:
//
//    HC-05 GND --- Arduino GND Pin
//    HC-05 VCC (5V) --- Arduino 5V
//    HC-05 TX --- Arduino Pin 10 (soft RX)
//    HC-05 RX --- Arduino Pin 11 (soft TX)
//    HC-05 Key/EN (PIN 34) --- Arduino Pin 9 
//
// alles ausser VCC anschließen, Arduino mit Programmm an USB anschliessen, dann Knopf auf BT-Modul drücken und gleichzeitig VCC an BT-Modul anschliessen
//
// Seriellen Monitor oeffnen, dann AT-Befehle eingeben
//
//    To return HC-05 to  default settings: "AT+ORGL"
//    To get version of your HC-05 enter: "AT+VERSION?"
//    To change device name from the default HC-05 to let's say MYBLUE enter: "AT+NAME=MYBLUE"
//    To change default security code from 1234 to 2987 enter: "AT+PSWD=2987"
//    To change HC-05 baud rate from default 9600 to 115200, 1 stop bit, 0 parity enter: "AT+UART=115200,1,0" 



#include <SoftwareSerial.h>

SoftwareSerial BTSerial(10, 11); // RX | TX

void setup()
{
  pinMode(9, OUTPUT);  // this pin will pull the HC-05 pin 34 (key pin) HIGH to switch module to AT mode
  digitalWrite(9, HIGH);
  Serial.begin(9600);
  Serial.println("Enter AT commands:");
  BTSerial.begin(38400);  // HC-05 default speed in AT command more
}

void loop()
{

  // Keep reading from HC-05 and send to Arduino Serial Monitor
  if (BTSerial.available())
    Serial.write(BTSerial.read());

  // Keep reading from Arduino Serial Monitor and send to HC-05
  if (Serial.available())
    BTSerial.write(Serial.read());
}