GSM GPRS A6

why getting garbage output in serial monitor (image attached)?
i trying send data web server using gsm gprs a6, in doing so, getting garbage output in serial monitor.

here code:

#include <softwareserial.h>
softwareserial mygsm(7,8);


void setup()
{
   mygsm.begin(115200); 
   serial.begin(9600); 
   delay(500);

   mygsm.println("at+cipshut");
   delay(1000);
   printserialdata();

   mygsm.println("at+cipmux=0");
   delay(2000);
   printserialdata();
 
   mygsm.println("at+cgatt=1");
   delay(1000);
   printserialdata();
 
 
   mygsm.println("at+cstt=\"internet\",\"\",\"\"");//setting apn,2nd parameter empty works networks
   delay(5000);
   printserialdata();
 
   mygsm.println();
   mygsm.println("at+ciicr");
   delay(6000);
   printserialdata();
 
   mygsm.println("at+cifsr"); //init http request
   delay(2000);
   printserialdata();
 
   mygsm.println("at+cipstart=\"tcp\",\"159.203.180.107\",\"80\"");
   delay(5000);
   printserialdata();
   delay(5000);
 
   mygsm.println("at+cipsend");
   delay(2000);
   printserialdata();
   mygsm.println("data sent gprs gsm a6 using arduino!!!");
   mygsm.write(0x1a);    //0x1a
 

   delay(3000);
   mygsm.println("at+cipclose");
   printserialdata();

   mygsm.println("at+cipshut");
   delay(1000);
   printserialdata();
}


void loop()
{
}


void printserialdata()
{
  while(mygsm.available()!=0)
    serial.write(mygsm.read());
}

you running softwareserial gsm modem @ 115200 baud
i have found in practice softwareserial looses/corrupts information above 38400baud or 57600baud (depends on board)
also serial output 9600 baud tend loose information if gsm 115200baud if i/o buffers fill up  - try serial @ 115200baud
i recommend reducing gsm baud rate or using arduino serial hardware ports sush mega

Arduino Forum > Using Arduino > Networking, Protocols, and Devices (Moderator: fabioc84) > GSM GPRS A6

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