Hi sir,

As i tried, code entering the loop only if the RCIF flag is raised,with below code, the code enters the loop, and the data from rcreg is transfered to an array(checked using led blinking),but as i tried to test the +CMTI format to check for the new messages,like in the  second part of code.but as soon as it receives a message the +cmti response must be send to the controller, i.e RCREG, but it is not happening.suggestions pls.

I am not sure, whether the +CMTI response is sent to controller or not. and my other doubt is whether the +CMTI response comes under the ECHO feature, because i have disabled the echo feature, will it be a reason for this??

while(!RCIF)
{
  RB2=1;                     //LED, which keeps blinking, loop working good.
  delay(2000);
  RB2=0;
  delay(2000);

  for(i=0;i<10;i++)
  {
    x[i]=RCREG;
  }

  if(x[0]=='+'|| x[1]=='+'||x[2]=='+'||x[3]=='+')     //+CMTI: "SM",1
  {
    RB1=1;                                 // testing this like x[0]!='+', then it works, so array is working good.
    delay(2000);
    RB1=0;
    delay(2000);
  }
  else continue;
}

Hi sir,

I just want to read only the new messages, as i test the gsm module with the hyperterminal, we get the indication for the new message in

the form of +CMTI: “SM”,1,  and my doubt is how to use this in c code, so that the loop must wait until this response is received from the gsm module,

where after that,  comparing the required bit,mode of motor operation can be decided.

sorry sir, my mistake… finally i got what required… no conversion was needed to display data from gsm on lcd. i got what exactly i got on hyperterminal now…
but as per the code below… loop is not getting repeated continuosly. i just mentioning last three bits for reference..

while(1)
{
  UART_Write_Text("AT+CMGR=1");
  UART_Write(0x0D);
  UART_Write(0x0A);

  for(i=0;i<67;i++)
  {
    x[i]=UART_Read();
  }

  Lcd4_Clear();
  Lcd4_Set_Cursor(1,1);
  lcd4_putch(x[63]);  // data corresponding bit
  lcd4_putch(x[64]);
  lcd4_putch(x[65]);
}

Hi sir,

As i copy data from RCREG to an array, i tried to convert the data to an ascii by adding 0x30 and 0x40 and print it on lcd. but i get

random alphabets and symbols which doesnt match with what i get it on hyperterminal.is that due to baud rate???

code used:

Lcd4_Clear();
Lcd4_Set_Cursor(1,0);
lcd4_putch((x[0]+0x30));  // if its giving unknown char ,add 0x40 to x[0] and try(HEX to ascii)
lcd4_putch((x[1]+0x30));
lcd4_putch((x[2]+0x30));
lcd4_putch((x[3]+0x30));

hi,

I must thank the forum for helpful suggestions posted. now the module has worked somewhat good, now by sending command AT i could see OK printed on the lcd screen. now to read the first msg using AT+CMGR=1; i receive data along with delivery OK and info s of the CMGR pattern, and my DOUBT is

1. how to disable the delivery message and

2. how to print only <data> out of RCREG format.
+CMGR:<stat>,<oa>,[<alpha>],<scts>[,<tooa>,<fo>,<pid>,<dcs>,<sca>,
<tosca>,<length>]<CR><LF><data>

First of all… thanks for your response sir.

As i tested the code with the hyperterminal…i could see the AT command printed on the terminal and as i press a key on the keyboard that gets printed on the lcd screan… so serial comm is of no problem.but when i interface pic with the gsm module. instead of getting OK i getback same command what i send(AT) on the lcd screan. suggestions pls.