#ifndef Compass_h #define Compass_h #if ARDUINO >= 100 #include "Arduino.h" #else #include "WProgram.h" #endif //0x21==0x42>>1, from bildr's code #define HMC6352SlaveAddress 0x21 #define HMC6352ReadAddress 0x41 class Compass{ public: void begin(); float getReading(); private: void _beginTransmission(); void _endTransmission(); }; #endif