Pic Sim300

putc(26);   //send the msg with a CNTL-Z    

 am new to PIC world and also I am moderate on C/C++. I have already communicated GSM Modem (SIMCOM300) using MS VB6.0 from PC successfully. Now I tried to communicate GSM Modem from PIC16F877A. I can able to send and receive sms, ring tone from/to GSM Modem SIM300 and PIC16F877A. All SMS commands works fine. But, when I issue "AT+CLCC" Command, it also works and also the commands followed by are also executed well, but it didn't come out from the loop. I have to switch-off the power and restart. Then only PIC process the command. Can you pl help me to locate the issue and guide me to solve this problem. I will be very humble and thankful to you if anyone provide help to solve this issue.

PIC16F877AHI-TECH C PRO Compiler (MPLAB v8.63)SIMCOM300 GSM ModemLCD JHD 162A

Code C - [expand]12345678910111213141516171819202122232425262728293031323334353637

Code: #include <stdio.h>#include <htc.h>#include "usart.h"#include "lcd.h"#include "string.h" __CONFIG(HS & WDTDIS & UNPROTECT &  LVPDIS); unsigned char gsmInput[60];unsigned int i=0;unsigned int lenOfGSMInput = 0; bit OK;bit Error;bit Ring; void showGSM_DATA(char GSM_DATA[]){ //to show the GSM OUTPUT after eliminating the chars '\r' and '\n'        if (strcmp(GSM_DATA, "OK") == 0){         OK = 1;    }    else if (strcmp(GSM_DATA, "ERROR") == 0){            Error = 1;    }    else if (strcmp(GSM_DATA, "RING") == 0){               Ring = 1;                GSM_DATA[0] = '\x00';        puts("AT+CLCC");        putch(0x0D);            }    else{

Code C - [expand]

383940414243444546474849505152535455565758596061626364656667686970717273747576777879808182838485868788

        lcd_clear();        lcd_goto(0);        lcd_puts(GSM_DATA);    }  GSM_DATA[0] = '\x00'; } // end function showGSM_DATA void main(int argc, char* argv[]){     unsigned char input;           INTCON=0;   // purpose of disabling the interrupts.        lcd_init(); // initiate LCD        init_comms();   // set up the USART - settings defined in usart.h                        puts("ATE0");    putch(0X0D);        puts("AT+CMGF=1");    putch(0X0D);        while(1){                               input = getch();    // read a response from the GSM                switch(input){                        case '\x0A': // if line feed detected in the GSM output i.e. '\n'                        break;            case '\x0D': // if carriage return detected i.e. '\r'                        gsmInput[i] = '\x00';                                                lenOfGSMInput = strlen(gsmInput);                        if (lenOfGSMInput > 0){                            i = 0;                            lenOfGSMInput = 0;                            showGSM_DATA(gsmInput);                        }                        break;            case '\x3E': // if greater-sign (in order to send SMS)                        break;                    default: // if characters received                gsmInput[i] = input;                i++;                break;        }//end brace for switch    } //end brace for while loop}//end brace for main

I have changed the code but the same result. I worked with hyperterminal also. It works fine. No problem there. I think problem in my code. I sent you the entire code for your review. Pl go thro' my code and try to find out the problem. I need your help. Pl.

For your information:

The following code works fine. (I have enabled Clip using AT+CLIP=1 to avoid AT+CLCC command. Before this, If I disconnect the call after processing AT+CLCC response (+CLCC : 1,1, ..), I cannot receive "NO CARRIER" message. Now I receive "NO CARRIER" because of "AT+CLIP" command)

Just display the GSM_DATA (No data validation):

void showGSM_DATA(char GSM_DATA[]){ //to show the GSM OUTPUT after eliminating the chars '\r' and '\n'

if (strcmp(GSM_DATA, "OK") == 0){ OK = 1;

if (strcmp(NextCmd, "CMGF") == 0){strcpy(NextCmd, "CLIP");puts("AT+CMGF=1");putch(0X0D);

}if (strcmp(NextCmd, "CLIP") == 0){*NextCmd = 0;puts("AT+CLIP=1");putch(0X0D);

}return;}

if (strcmp(GSM_DATA, "ERROR") == 0){Error = 1;*GSM_DATA = 0;return;}

if(strlen(GSM_DATA) > 6){

lcd_clear();lcd_goto(0);lcd_puts(GSM_DATA);}*GSM_DATA = 0;return;

} // end function showGSM_DATA

*** The following also works fine but only one time(Startup Commands like ATE0, AT+CMGF=1, AT+CLIP=1) and Any Phone/SMS received (After Successful Startup

Commands Execution). If I send another SMS/Phone nothing happen. I have to restat the device. GSM Modem working correctly.

Just I add substring function. Thats all:

if(strlen(GSM_DATA) > 6){

substring(0,14,GSM_DATA);

}

void substring(size_t start, size_t stop, char src[]){

int j = 0;

if (start >= stop){//return substringOfInput;return;}

for(i = start;i < stop; i++){substringOfInput[j] = src[i];j++;}

substringOfInput[j] = '\x00';lcd_clear();lcd_goto(0);lcd_puts(substringOfInput);*src=0;*substringOfInput=0;j=0;return;} 

Can you pl help me?

Hi seadolphine,

I found the bug I made in the code inside "substring" function. I already declared "i" as global variable. I removed and also change the code line

void substring(size_t start, size_t stop, char src[]){

int j = 0;

if (start >= stop){//return substringOfInput;return;}

for(i = start;i < stop; i++){substringOfInput[j] = src[i];j++;

}

substringOfInput[j] = '\x00';lcd_clear();lcd_goto(0);lcd_puts(substringOfInput);*src=0;*substringOfInput=0;j=0;return;}

to

for(int i = start;i < stop; i++){

Now everything works fine. Great Thanks.

#include<16f877a.h>#include"pic1.h"#include"lcd.h"char ch;void main(){lcdinit();rc3=0;printf("AT\n\r");while(1){ch=getch();printc(ch);delay_ms(200);}}

Sample code

// RX DATA

#INT_RDAvoid READ_RS232(){char c;c=getc(GSM);//fprintf(DEBUG"%c",c);buffer[buffer_index] = c;

buffer_index++;setup_timer_1(T1_INTERNAL | T1_DIV_BY_8);set_timer1(49910); // Timeout = 50 ms}

casn anyone help me im in the deadlin but my problem is i can communicate my mobile phone to the phone connected to the picsms.JPG

and here is my code

#define TRIGGER PORTD.F1 // set porta/f5 as output

unsigned int index=0,count=0,address=0,addrLength=247,intFlag=0 ;unsigned short intTimer;unsigned char msg[30], mess[20];

void textMode();void phoneMem();void readMsg();void delMsg();void check_message();void SMSProcess();

void interrupt(){intTimer++;PIR1.TMR1IF=0;if(intTimer%10==0){if(intTimer%20==0){intFlag=1;}}}//SMS processingvoid textMode(){ // Set message format as textmode

Usart_Write('A');Usart_Write('T');Usart_Write(0x0D);delay_ms(500);

Usart_Write('A');Usart_Write('T');Usart_Write('+');Usart_Write('C');Usart_Write('M');Usart_Write('G');Usart_Write('F');Usart_Write('=');Usart_Write('1');Usart_Write(0x0D);delay_ms(1000);}void ckpd() { // Received read messageUsart_Write('A');Usart_Write('T');Usart_Write('+');

Usart_Write('C');Usart_Write('K');Usart_Write('P');Usart_Write('D');Usart_Write('=');Usart_Write('1');Usart_Write(0x0D);}

void phoneMem() { // Set preferred message storage as Phone Memory

Usart_Write('A');Usart_Write('T');Usart_Write('+');Usart_Write('C');Usart_Write('P');Usart_Write('M');Usart_Write('S');Usart_Write('=');Usart_Write('"');Usart_Write('M');Usart_Write('E');Usart_Write('"');Usart_Write(0x0D);delay_ms(1000);

}

void readMsg() { // Received read messageUsart_Write('A');Usart_Write('T');Usart_Write('+');Usart_Write('C');Usart_Write('M');Usart_Write('G');Usart_Write('R');Usart_Write('=');Usart_Write('1');Usart_Write(0x0D);}

void delMsg() { // Delete message for preferred message memoryUsart_Write('A');Usart_Write('T');Usart_Write('+');Usart_Write('C');Usart_Write('M');Usart_Write('G');Usart_Write('D');Usart_Write('=');

Usart_Write('1');Usart_Write(0x0D);delay_ms(500);}

void check_message() { // check message statusif(strcmp(mess,"Unlock")==0){TRIGGER=1; // trigger relaydelay_ms(2000);TRIGGER=0;}}void main() {TRISA=0x3F;ADCON1=0x06;PORTA=0x00;TRISB = 0X00;PORTB=0x00;TRISD=0x00; // Set PORT D as OUPTPUTPORTD=0x00;

Usart_Init(9600);

intTimer = 0;

TRIGGER=0;

INTCON.GIE = 1;INTCON.PEIE= 1;T1CON=0x30;T1CON.TMR1ON=1;PIR1.TMR1IF=0;PIE1.TMR1IE=0;

textMode();phoneMem();

TMR1H=0x00;TMR1L=0x00;

}

int extract_message(){ // extract the message from the cellphoneint x=0,y=0,flag=1;char a;

readMsg();while(x!=10000){

if(Usart_Data_Ready()){y++;a=Usart_Read();if(a=='r'||a=='R'){

flag=0;break;}if(y>=70){if(a!='O' && a!='K' && isalpha(a)){msg[x++]=a;

}

}

x++;

}PIE1.TMR1IE=1;return flag;}

}

hi... gsm man

we can send sms from gsm modem.but cant receive sms and to display it on lcd by pic16f877a..pl help me..we are in deadline.check my code and correct it.

#include <16f877a.h>#include "string.h"#fuses HS, NOWDT, NOPROTECT, NOLVP#use delay(clock=20000000)#use rs232(baud=9600, bits=8, parity=N, xmit=PIN_C6, rcv=PIN_C7, stream=GSM)#define RS PIN_E0#define E PIN_E1

void out_lcd_string(char *string);

char initialize[] = "Initialize....";void clear();void cmd();void lcddata(char value);void LCDInit();void display(char *x);char char_rcvd;void readindex(void);void ledtest(void);byte data[70];int t = 0;int i= 0;

/*void dwr(){//character to LCD display

output_high(RS);output_high(E);output_low(E);delay_ms(2);}

LCDPutchar( int t){delay_ms(25);output_b((unsigned char)t);dwr();delay_ms(25);

}*/

/*#int_rdavoid serial_isr(){char_rcvd = fgetc(GSM);

while(char_rcvd !='\0'){//char_rcvd = fgetc(GSM);data[i]=char_rcvd;i++;}i=0;//data[i] = 0; // return new line shows that all character has been collected

}*/#int_rdavoid serial_isr(){int i= 0;

//char_rcvd = fgetc(GSM);// while (char_rcvd!='\0')while(i!=2){char_rcvd = fgetc(GSM);data[i]=char_rcvd;output_high(PIN_B7);i++;}i=0;t=1;

//data[i] = 0; // return new line shows that all character has been collected

}

void cmd(){//command for lcd display

output_low(RS);output_high(E);output_low(E);delay_ms(2);}

void readindex(void){//while(1)//{delay_ms(1000);

fputc('A',GSM);fputc('T',GSM);fputc('+',GSM);fputc('C',GSM);fputc('M',GSM);

fputc('G',GSM);fputc('f',GSM);fputc('=',GSM);fputc('1',GSM);fputc(0x0D,GSM);//fprintf(GSM, "AT+CMGF = 1\r\n"); //set to GSM to text modedelay_ms(1000);

enable_interrupts(int_rda);

fputc('A',GSM);fputc('T',GSM);fputc('+',GSM);fputc('C',GSM);fputc('M',GSM);fputc('G',GSM);fputc('R',GSM);fputc('=',GSM);fputc('1',GSM);fputc(0x0D,GSM);

//fprintf(GSM, "AT+CMGR = 1\r\n"); //read SMS at location inedex one

while(t!=1){} // wait til interrupt

disable_interrupts(int_rda);

delay_ms(100);

t = 0;

output_high(PIN_B6);out_lcd_string(data); //send SMS string to LCD

}

void out_lcd_string(char *string) //this function will display all string of SMS from GSM{unsigned int i;

for(i =0; i<strlen(string); i++){output_b((int)string[i]);delay_ms(1);output_high(PIN_E1); //enableoutput_high(PIN_E0); //low disabledelay_ms(1);output_low(PIN_E1);delay_ms(1);

}}

void lcddata(char value){output_b(value); //put the value on the pinsoutput_high(PIN_E0); //rs highoutput_high(PIN_E1); // enable pins H-L pulsedelay_ms(15);output_low(PIN_E1); //enable pins}

void LCDInit(){output_b(0x38);cmd();output_b(0x10);cmd();output_b(0x0f);cmd();output_b(0x06);cmd();output_b(0x01);cmd();}

void clear(){output_b(0x01);cmd();output_b(0x80);cmd();

}

void display(char *x) //this function will display a string of character{int i = 0;

for(i = 0; i<strlen(x); i++)lcddata(x[i]);

}

void main(){clear();delay_ms(300);LCDInit();delay_ms(200);

//setup_adc_ports(NO_ANALOGS);//setup_adc(ADC_OFF);//setup_psp(PSP_DISABLED);//setup_spi(FALSE);//setup_wdt(WDT_OFF);//setup_timer_1(T1_DISABLED);

//setup_timer_2(T2_DISABLED,0,1);enable_interrupts(global);enable_interrupts(int_rda);

//cmd(); // display on, cursor on//delay_ms(200);//setup_oscillator(False);/*output_low(PIN_B7);output_low(PIN_B6);output_low(PIN_B5); // goes low for GSM modem*/

/*poweron();

delay_ms(200);

delay_ms(500);lcdcmd(0x38); // init LCD 2 lines 5x7 matrixdelay_ms(200);lcdcmd(0x0e); // display on, cursor ondelay_ms(200);lcdcmd(0x01); // clear LCDdelay_ms(200);lcdcmd(0x80); //shift cursordelay_ms(200);*/

display( initialize ); //display initialize on LCDdelay_ms(300);

readindex();delay_ms(200);while(1){//out_lcd_string(data);//delay_ms(200);

//}

/*void lcdcmd(int value1){output_low(PIN_E0); //rs lowoutput_low(PIN_E1); //enableoutput_d(value1) ; //put the value on the pinsoutput_high(PIN_E1); //strobe the enable pins H-L pulsedelay_ms(15);output_low(PIN_E1); //enable}*/

/*void clear_lcd(void){

output_low(PIN_E1); //enable bitoutput_low(PIN_E0); // Rs= 0output_d(0x01); //clear displayoutput_high(PIN_E1); // H-L pulsedelay_ms(1);output_low(PIN_E1); // H-L pulse}*/

/*void poweron(void){

output_low(PIN_B5);output_high(PIN_B5);delay_ms(2000);output_low(PIN_B5);

}*/

}

}

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Re: How to get SMS delivery notification by GPRS modem (SIM300)

+CDS : <length> <CR> <LF><pdu> (PDU mode) or +CDS : <fo>,<mr>, [<ra>] , [<tora>], <scts>,<dt>,<st> (Text mode)2: SMS-STATUS-REPORTs are stored and routed using the unsolicited result code :+CDSI: “SR”,<index>

#include <16F877.h>                                       // Defines chip #include <stdio.h>                                       // this gets the printf() definition #include <string.h>                                       // string handling library #use delay(clock=4000000)                                 // tells compiler clock speed #fuses hs, noprotect, nowdt, nolvp, nobrownout                  // sets the fuses #use rs232(baud=9600,xmit=PIN_C6, rcv=PIN_C7, stream=GSM, ERRORS)   // sets the rs232 up #byte PORTD = 8                                          // portd is located at file 8 #bit   injector1 = PORTD.0                                 // portd1 is injector1 #bit   injector2 = PORTD.1                                 // portd2 is injector2 #bit   injector3 = PORTD.2                                 // portd3 is injector3 #bit   injector4 = PORTD.3                                 // portd4 is injector4 #bit   lift_pump = PORTD.4                                 // portd5 is lift pump 

. const int CR=0x0d; const int CZ=0x1A; const int LF=0x0A; 

char response[8]; char reply[20]; char result[2]; 

int read_message; int send_message; int delete_message; int receive_message; int shutdown; 

void main(void) { set_tris_d(0xE0); 

}; 

void send_message() 

{ 

fprintf(GSM,"AT\r\n"); delay_ms(500);                     // checks are they communicating fgets(GSM);                     //gets the responce and dump it 

fprintf(GSM,"AT+CMGF=1\r\n");          // sends an at command to set messages to text mode delay_ms(500);                     //sends a carriage return fgets(GSM);                     //gets the responce and dump it 

fprintf(GSM,"AT+CMGS=\"07749960685\"\r\n"); // sents the following text to this number delay_ms(500); fgets(GSM);                     //gets the responce and dump it 

fprintf(GSM,"Shutdown Procedure Complete. Contact Authorities");       // the text that will actually be sent delay_ms(100); 

fputc(CZ,GSM);                         // sends carriage return gets(response,GSM);                        // gets the confirmation reply 

while(1) { } 

void receive_message() {    char msg_coding1[80];    char msg_coding2[80];    signed int8 result; 

   fgets(GSM);    fprintf(GSM,msg_coding1);    result = stricmp(msg_coding1, msg_coding2);       if(result=0)                     //if stricmp return 0 ==true          read_message(); 

      else if(result=-1)                  // if stricmp returns -1 == false          main(); 

      else (result=1)                     // if stricmp returns 1 == false          main();     }; 

void read_message() { 

   char text_code1[6];    char text_code2 = stop    char text_code3 = start    signed int8 result; 

   fprintf(GSM,"+CMTI: "SM",1");      //sends the command to read the message at location 1    delay_ms(500)                  //wait 500ms        fgets(GSM);                     //gets the first line of text message and dumps it    delay_ms(500)                  //wait 500ms        fgets(GSM);                     // gets the second line and dumps it    delay_ms(500)                  //wait 500ms        fgets(GSM);                     //gets the 3rd line which is line we want    delay_ms(500)                  //wait 500ms        fputs(GSM,text_code);            // puts the string in file called text_code    delay_ms(500) 

   fgets(GSM);                     // gets the blank line        result1 = stricmp(text_code1, text_code2);    result2   = stricmp(text_code1, text_code3);              if(result1=0 && result2=-1||1)                     //if result1 is true carry out shut down          shutdown();                                 //procedure 

      else if(result1 = 1||-1 && result2 = 0)                  // if result2 is true carry out startup          main(); 

      else (result=1||-1 && result2= 1||-1)                     // if stricmp returns 1 == false          delete_message();    fgets(GSM);                     //gets the carriage return and dumps it 

   delay_ms(500)                  //wait 500ms     }; 

//this function deletes the message in location 1 void delete_message(void) {    fprintf(GSM="AT+CMGD=1");            //deletes the text message at location1 so next command can be dealt with    delay_ms(500)    gets(response,GSM);                  // gets the ok response    main }; 

// this function carries out the shut down procedure void shutdown(void) {    injector1= 0;                        // switch off injector 1    delay_ms(500);    injector2= 0;                        // switch off injector 2    delay_ms(10000);                     // wait ten seconds    delay_ms(10000);                     // wait ten seconds    delay_ms(10000);                     // wait ten seconds    delay_ms(10000);                     // wait ten seconds    delay_ms(10000);                     // wait ten seconds    delay_ms(10000);                     // wait ten seconds (1 minute)    lift_pump=0;                        // turn the life pump in tank off //once the pump has been deactivated the engine will have no fuel and so the car will come to a //halt,    receive_message();                     // calls cool down period where it waits for the                                     // command to turn the car back on }; 

How to test your GSM device/SIM card using Hyperterminal

To test if your GSM device, phone or GSM modem can work with VisualGSM, you can use Window's hyperterminal.

1). Start Hyperterminal as shown below:-

 2). Connect your GSM device to a COM port, e.g. COM port 1. Ensure that there is sufficient COM ports in the first place. For IrDA or infrared connection, please ensure that your IrDA port is mapped to a serial port, e.g. COM4 is commonly used by IrDA. Some mobile devices can only be connected via IrDA, e.g. Nokia 8210.

(Note: IrDA is used by only VisualGSM Lite. If you are using IrDA on Win2k, you may need to install a patch. You can download the patch from Lite download page.)

 3). Enter a name for the connection, e.g. test.

 4). Select COM port 1, if you device is connected to COM 1. If you are not sure, you can try the other COM ports.

 5). Click restore default. If you are using a mobile phone via data cable, you may need to change the baud rate to 19200 Bits per second.

 6). Go to File - Properties.

 7). Click on Settings tab, select ASCII Setup. Ensure that "Append line feeds to incoming line ends", "Wrap lines that exceed terminal width", and "Send line ends with line feeds" are checked.

 8.) Test your connection by issuing AT, and AT+CPIN. If you get OK and +CPIN: READY as response, then your device is ready for use with VisualGSM Enterprise. If you cannot get the response as shown below, please check with other ports, and baud rate combinations.