   float firstVolt = (firstVal/1024.0)*5;
   float secondVolt = (secondVal/1024.0)*5;
   double current = (firstVolt - secondVolt)/smallR;
+  if(current < 0) {
+    current = 0;
+  }
   double power = current*current*(bigR+smallR+20);
  
   bmp.getEvent(&eventP);

  {
    heading = 360 + heading; 
  }
  Serial.print("{");
  
  Serial.print("\"current\": ");  

  Serial.print(heading);
  Serial.print("]");
  Serial.print(", ");
  
  Serial.print("\"accelerometer\": ");
  Serial.print("[");
  Serial.print(eventA.acceleration.x);
