GPRS Shield V2

[Jacket_Chen]

Maybe this is just a simple demo:

#include <SoftwareSerial.h>

SoftwareSerial GPRS(7, 8);
unsigned char buffer[64]; // buffer array for data recieve over serial port
int count = 0; // counter for buffer array

void setup()
{
GPRS.begin(19200); // the GPRS baud rate
Serial.begin(19200); // the Serial port of Arduino baud rate.
}

void loop()
{
if (GPRS.available()) // if date is comming from softwareserial port ==> data is comming from gprs shield
{
while (GPRS.available()) // reading data into char array
{
buffer[count++] = GPRS.read(); // writing data into array
if (count == 64)
break;
}
Serial.write(buffer, count); // if no data transmission ends, write buffer to hardware serial port
clearBufferArray(); // call clearBufferArray function to clear the storaged data from the array
count = 0; // set counter of while loop to zero
}
if (Serial.available()) // if data is available on hardwareserial port ==> data is comming from PC or notebook
GPRS.write(Serial.read()); // write it to the GPRS shield
}

void clearBufferArray() // function to clear buffer array
{
for (int i=0; i < count; i++)
{
buffer[i] = NULL;
} // clear all index of array with command NULL
}