SIM900 - Receive SMS problem

[thedoctor46]

Hello everybody,

I have a very strange problem with my SIM900. I can send an SMS from my Arduino but I can not receive.

Here are the codes:

https://drive.google.com/file/d/0B5RP5NsysFygMHRZQThrdURXc0E/view

I have done everything from that tutorial. Also, I have tried to use hardvare serial instead of software serial, but doesn't help.

I have also tried this code:

Code: [Select]

#include <SoftwareSerial.h>

SoftwareSerial GPRS(7, 8);

unsigned char buffer[64];  // buffer array for data receive over serial port
int count=0;               // counter for buffer array

void setup()
{
  GPRS.begin(19200);
  Serial.begin(19200);
}

void loop()
{
  if (GPRS.available())
  {
    while(GPRS.available())
    {
      buffer[count++]=GPRS.read();
      if(count == 64)break;
    }
    Serial.write(buffer,count);
    clearBufferArray();
    count = 0;
  }
  if (Serial.available())
    GPRS.write(Serial.read());
}

void clearBufferArray()
{
  for (int i=0; i<count;i++)
  {
    buffer[i]=NULL;
  }
}

and to test AT commands, but nothing happends.

Can someone help me?

[paulcastor30]

Can you give the hardware you used so sir? So that you can be helped.