GPRS Shield V2

[julian4]

Hi,
I am interested in the GPRS V2 Shield because of the PCB antenna, less holes in project box.
But I cannot seem to find any libraries or example code on the wiki.
And is there an RTC onboard as it looks like a battery holder near the sim holder.

Would appreciate a bit of guidance from someone in the know ???

Thanks and kind regards,

jB

[Jacket_Chen]

yeah, we don’t have a library for GPRS , just having some codes on wiki , however, we just provide a basic program , but you can add any functions to it.

As for a RTC , we have not used it at all , But the specification says it has a RTC backup.

[Bruce.Qin]

Hi julian4,
The wiki page contain demo code. You can reference it to use SMS, call and Internet. You need to reference the SIM900 manual to use RTC function. Thanks!

[julian4]

Hi,

Thanks for the replies.
I could not find any demo code on the wiki, so will have a look again.
Kind regards,

jB

[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
}

[julian4]

Hi,

Thanks again, just as well I have ordered one now, just to test your code (grin).

I want to make an SMSC so hope all goes well.

Kind regards,

jB