1. You can safely connect a 3.3V i2c device to an Arduino if you call:
cbi(PORTC, 4);
cbi(PORTC, 5);
in your setup() method to disable the pullup resistors on pins A4 and A5.
2. You can include C++ code in Obj-C files only if your ObjC files have the .mm extension rather than the .m extension. This is because the ObjC++ compiler can process C++ files, while the ObjC compiler cannot.
3. The event dispatching system in OF requires a declaration of a ofEvent
4. The ITG3200 magnetometer is very sensitive to have its power interrupted. Even if interrupted for a millisecond it will need to be reset and recalibrated.
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