Merge pull request #17 from kolaha99/patch-2

MAX31855: fix sign of readReferenceTemperature function

Author: leonardocavagnis

Diff for: src/utility/THERMOCOUPLE/MAX31855.cpp

@@ -208,15 +208,15 @@ float MAX31855Class::readReferenceTemperature(int type)
 
   // The cold junction reference temperature is stored in the first 11 word's bits
   // sent by the Thermocouple-to-Digital Converter
-  rawword = rawword & 0x7FF;
+  rawword = rawword & 0xFFF;
   // check sign bit  and convert to negative value.
   if (rawword & 0x800) {
     ref = (0xF800 | (rawword & 0x7FF))*0.0625;
   } else {
       // multiply for the LSB value
       ref = rawword * 0.0625f;
   }
-  Serial.println(ref);
+  
   return ref;
 }