void printDouble( double val, byte precision){
 // prints val with number of decimal places determine by precision
 // precision is a number from 0 to 6 indicating the desired decimial places
 // example: lcdPrintDouble( 3.1415, 2); // prints 3.14 (two decimal places)

 if(val < 0.0){
   Serial.print('-');
   val = -val;
 }

 Serial.print (int(val));  //prints the int part
 if( precision > 0) {
   Serial.print("."); // print the decimal point
   unsigned long frac;
   unsigned long mult = 1;
   byte padding = precision -1;
   while(precision--)
      mult *=10;

   if(val >= 0)
frac = (val - int(val)) * mult;
   else
frac = (int(val)- val ) * mult;
   unsigned long frac1 = frac;
   while( frac1 /= 10 )
padding--;
   while(  padding--)
Serial.print("0");
   Serial.println(frac,DEC) ;
 }