//connect bluetooth RX to Pin 11 and TX to Pin 10
//#define Version2x
#define Version3

#include <SoftwareSerial.h>
SoftwareSerial mySerial(10, 11);
String input;
char output[20];
int l=20;

void setup() {
  Serial.begin(9600);
  Serial.println("Los geht's");
  mySerial.begin(9600); //38400 für hc-05
}
void loop() { // run over and over
  for (int i=1; i<=12; i++){
    switch (i){
      case 1: 
        mySerial.begin(1200);
        break;
      case 2: 
        mySerial.begin(2400);
        break;
      case 3: 
        mySerial.begin(4800);
        break;
      case 4: 
        mySerial.begin(9600);
        break;
      case 5: 
        mySerial.begin(19200);
        break;
      case 6: 
        mySerial.begin(38400);
        break;
      case 7: 
        mySerial.begin(57600);
        break;
      case 8: 
        mySerial.begin(115200);
        break;
      case 9: 
        mySerial.begin(230400);
        break;
      case 10: 
        mySerial.begin(460800);
        break;
      case 11: 
        mySerial.begin(921600);
        break;
      case 12: 
        mySerial.begin(1382400);
        break;
    }
    Serial.println(i);
    delay(500);
    #ifdef Version2x
      mySerial.print("AT");    
      delay (1000);
      if (mySerial.available()) {
        input=mySerial.readString();
        input.toCharArray(output,l);
        Serial.write(output);
        Serial.println();
        delay (100);
  
        mySerial.write("AT+VERSION");
        input=mySerial.readString();
        input.toCharArray(output,l);
        Serial.write(output);
        Serial.println();
        
        mySerial.write("AT+NAMEHC-06");
        input=mySerial.readString();
        input.toCharArray(output,l);
        Serial.write(output);
        Serial.println();
        
        mySerial.write("AT+PIN1234");
        input=mySerial.readString();
        input.toCharArray(output,l);
        Serial.write(output);
        Serial.println();
        
        mySerial.write("AT+BAUD4");
        input=mySerial.readString();
        input.toCharArray(output,l);
        Serial.write(output);
        Serial.println();
      }
    #endif
    #ifdef Version3
      mySerial.println("AT");
      delay (1000);
      if (mySerial.available()) {
        input=mySerial.readString();
        input.toCharArray(output,l);
        Serial.write(output);
        Serial.println();
        delay (100);

        mySerial.println("AT+VERSION");
        input=mySerial.readString();
        input.toCharArray(output,l);
        Serial.write(output);
        Serial.println();
        
        mySerial.println("AT+NAME=HC-06");
        input=mySerial.readString();
        input.toCharArray(output,l);
        Serial.write(output);
        Serial.println();

        mySerial.println("AT+PSWD:\"1234\"");
        input=mySerial.readString();
        input.toCharArray(output,l);
        Serial.write(output);
        Serial.println();

        mySerial.println("AT+UART=9600,0,0");
        input=mySerial.readString();
        input.toCharArray(output,l);
        Serial.write(output);
        Serial.println();
      }
    #endif
  }
}