         delay(50); 
       }
   }
+  if ((upHigh == 0) || (upLow == 0xFFFF)) return;  // If nobody answers then restart loop
 Serial.print("Scan up complete "); 
 Serial.print(upLow);
 Serial.print("-");

        delay(50); 
      }
  }
Serial.print("Scan down complete "); 
Serial.print(downLow);
Serial.print("-");

 frequency = ( ((upLow + downLow) / 2) + ((((upHigh + downHigh) / 2) - ((upLow + downLow)/ 2)) / 2)   );
 Serial.print("Centre frequency offset is ");
 Serial.println(frequency);
 delay(50);
 config.ee_frequency_hi = frequency >> 8;
 config.ee_frequency_lo = frequency & 0x00FF;

