#include <SoftwareSerial.h>  
void setup() {
  Serial.begin(115200);
}
void loop() {
char buffer[]="what12";
char returnChar[4]; 
char * ptr = strchr(buffer, '1'); 
strncpy(returnChar, ptr, 4);
 Serial.println(returnChar);

  if (strstr(returnChar,'what')) {
      Serial.println(" hit -what-");
  }
}