Receiving multiple chars at once with Software Serial - bluetooth

Question

I have a Arduino Uno R3 and a Bluetooth Mate.
When linking the Mate to the Arduino Hardware Serial (pin 0,1) I can send multiple characters at once from my connected device but when I try to make the same thing with Software Serial (using pin 4,2 for example) I only get the first character and the rest of the chars are messed up.
My code:
#include <SoftwareSerial.h>  
int bluetoothTx = 4;  
int bluetoothRx = 2;  
SoftwareSerial bluetooth(bluetoothTx, bluetoothRx);
void setup()
{
 Serial.begin(115200);  
 bluetooth.begin(115200);  
}
void loop()
{
 if(bluetooth.available())
 {
   Serial.print((char)bluetooth.read());  
 }
}
For example if I send this chars: abcd from my android device I get this in the serial monitor: a±,ö
This code that uses Hardware Serial (I link my bluetooth to pins 0 and 1) works just fine:
void setup()
{
 Serial.begin(115200);  
}
void loop()
{
 if(Serial.available())
 {
   Serial.print((char)Serial.read());  
 }
}
I even tried changing the baud rate but it didn't helped
If I send the chars one by one it works fine but I would like to be able to send them as a string.

Answer 1

You could try to bufferize the string before printing it.
Look at the following answer: Convert serial.read() into a useable string using Arduino?

Answer 2

As pointed out by #hyperflexed in the comments this is a baudrate related issue.
I had to take the baudrate as low as 9600 to make it work.
This is the code that worked:
#include "SoftwareSerial.h";
int bluetoothTx = 4;
int bluetoothRx = 2;
SoftwareSerial bluetooth(bluetoothTx, bluetoothRx);
void setup()
{
Serial.begin(9600);
delay(500);
bluetooth.begin(115200);
delay(500);
bluetooth.print("$$$");
delay(500);
bluetooth.println("U,9600,N");
delay(500);
bluetooth.begin(9600);
}
void loop()
{
if(bluetooth.available()) {
char toSend = (char)bluetooth.read();
Serial.print(toSend);
}
if(Serial.available()) {
char toSend = (char)Serial.read();
bluetooth.print(toSend);
}
}
For changing the baudrate I had to put some big delays to make sure the commands are executed otherwise it won't work.