#include "lcd.h" namespace SerialConstants { extern const byte NOTE_HEADER = 201; extern const byte SUSTAIN_HEADER = 202; extern const byte SETTING_HEADER = 203; extern const byte RESET_HEADER = 204; extern const byte VOLUME_HEADER = 205; } void sendSerialToMain(byte header, byte setting, byte value) { Serial1.write(header); Serial1.write(setting); Serial1.write(value); }