reduce timeout value on modbus

kraftsensor.c

@@ -34,9 +34,9 @@ void do_kraftsensor(){
 
     /* read 2 16bit values and merge to 32bit signed integer */
     readReg(1,0,2);
-    if(wait_receive(2, m_data, 100)){
+    if(wait_receive(2, m_data, 10)){
         kraftsensor_valid = 0;
-        //printf("modbus error\n\r");
+        printf("modbus error\n\r");
     }
     else{
         kraftsensor_valid = 1;