     //some error
     //continue along previous path 
     //lcd.print("don't know");
+    BT.print("don't know");
   }
   }
   else
   {
     //lcd.print("no signal");
+    BT.print("no signal");
     analogWrite(l1_motor, 0);
     analogWrite(l2_motor, 0);
     analogWrite(r1_motor, 0);
     analogWrite(r2_motor, 0);
   }
+
+  BT.println();
+  BT.println();
 }
 
 

  {
    //go east
    //lcd.print("go east");
    analogWrite(l1_motor, 255);
    analogWrite(l2_motor, 0);
    analogWrite(r1_motor, 0);



#include <SoftwareSerial.h>
#define BT_SERIAL_TX_DIO 2
#define BT_SERIAL_RX_DIO 3

SoftwareSerial BT(BT_SERIAL_TX_DIO, BT_SERIAL_RX_DIO);

