[SOLVED] how to get specific string?

Code ASM - [expand]
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+CMGR: "REC UNREAD","+628987654321",,"11/07/10,18:25:40+28"

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// LCD module connections
sbit LCD_RS at PORTD6_bit;
sbit LCD_EN at PORTD7_bit;
sbit LCD_D4 at PORTD2_bit;
sbit LCD_D5 at PORTD3_bit;
sbit LCD_D6 at PORTD4_bit;
sbit LCD_D7 at PORTD5_bit;
 
sbit LCD_RS_Direction at DDD6_bit;
sbit LCD_EN_Direction at DDD7_bit;
sbit LCD_D4_Direction at DDD2_bit;
sbit LCD_D5_Direction at DDD3_bit;
sbit LCD_D6_Direction at DDD4_bit;
sbit LCD_D7_Direction at DDD5_bit;
// End LCD module connections
 
char *output;
int res;
char txt_sub[] = "+CMGR: \"REC UNREAD\",\"";
 
void delay() {                  // Function untuk delay
  Delay_ms(10);                // delay 500 mili detik
}
 
void main() {
 
  UART1_Init(9600);               // Initialize UART module at 9600 bps
  delay();                        // Wait for UART module to stabilize
  
  lcd_init();
  lcd_cmd(_lcd_clear);
  lcd_cmd(_lcd_cursor_off);
 
  lcd_out(1,1,"Read Data");
  uart1_write_text("AT+CMGR=1\r\n");
  delay();
 
  while (1) {
  if (UART1_Data_Ready() == 1) {          // if data is received
    UART1_Read_Text(output, "\",,\"", 255);    // reads text until '",,"' is found
    res = strcmp(output,txt_sub);
    uart1_write(res);
    res = '\x0';
    lcd_out(2,1,res);
     }
}
}

Code ASM - [expand]
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lcd_out(2,1,res);

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// LCD module connections
sbit LCD_RS at PORTD6_bit;
sbit LCD_EN at PORTD7_bit;
sbit LCD_D4 at PORTD2_bit;
sbit LCD_D5 at PORTD3_bit;
sbit LCD_D6 at PORTD4_bit;
sbit LCD_D7 at PORTD5_bit;
 
sbit LCD_RS_Direction at DDD6_bit;
sbit LCD_EN_Direction at DDD7_bit;
sbit LCD_D4_Direction at DDD2_bit;
sbit LCD_D5_Direction at DDD3_bit;
sbit LCD_D6_Direction at DDD4_bit;
sbit LCD_D7_Direction at DDD5_bit;
// End LCD module connections
 
char output[255];
char txt_sub[] = "+62";
char *res;
char nomor[20];
char i=0;
char terima;
 
void delay() { // Fungsi untuk delay
Delay_ms(500); // delay 500 mili detik
}
 
void main() {
 
UART1_Init(9600); // Initialize UART module at 9600 bps
delay(); // Wait for UART module to stabilize
 
lcd_init();
lcd_cmd(_lcd_clear);
lcd_cmd(_lcd_cursor_off);
 
lcd_out(1,1,"Read Data");
uart1_write_text("AT+CMGR=1");
UART1_Write(13);UART1_Write(10);
 
  while(1){
    while (terima == 0) {
      if (uart1_data_ready ()){
      UART1_Read_Text(output, "OK", 255);    // reads text until 'OK' is found
      terima = 1;
      }
   }
  lcd_cmd(_lcd_clear);
  lcd_out(1,1,"ada OK");
  terima = 0;
  delay();
  res = strstr(output,txt_sub);
  for(i=0; i<=12; i++)
  nomor[i] = *(res+i);
  nomor[i] = '\x0';
  lcd_out(2,1,nomor);
  }
}