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void function(char *buffer, uint32_t size){
  char *p=(char*)malloc(compareSize); //compareSize is the size of the text to be compared
  #define TXTCOMPARE1 (char*)"Sample Text 1"
  #define TXTCOMPARE2 (char*)"Sample Text 2"
  #define TXTCOMPARE3 (char*)"Sample Text 3"
  switch(intCompare){
    case COMPARE1 :
      p = strstr(buffer,TXTCOMPARE1); break;
    case COMPARE2 :
      p = strstr(buffer,TXTCOMPARE2); break;
    case COMPARE3 :
      p = strstr(buffer,TXTCOMPARE3); break;
  }
  if(p!=NULL) { Serial.println("Success!"); }
  else { Serial.println("No match"); }
    memset(&p,0,sizeof(p);
}

void function(char *buffer, uint32_t size){
  char *p=(char*)malloc(compareSize); //compareSize is the size of the text to be compared
  #define TXTCOMPARE1 (char*)"Sample Text 1"
  #define TXTCOMPARE2 (char*)"Sample Text 2"
  #define TXTCOMPARE3 (char*)"Sample Text 3"
  switch(intCompare){
    case COMPARE1 :
      p = strstr(buffer,TXTCOMPARE1); break;
    case COMPARE2 :
      p = strstr(buffer,TXTCOMPARE2); break;
    case COMPARE3 :
      p = strstr(buffer,TXTCOMPARE3); break;
  }
  if(p!=NULL) { Serial.println("Success!"); }
  else { Serial.println("No match"); }
    memset(&p,0,sizeof(p);
}

//using the same p declaration as above
p = strstr(buffer,TXTCOMPARE1);
if(p != NULL) { Serial.print("Success:"); }
else { Serial.print("No Match"); }

//using the same p declaration as above
p = strstr(buffer,TXTCOMPARE1);
if(p != NULL) { Serial.print("Success:"); }
else { Serial.print("No Match"); }