I have been working on a mobile project that needs to know the direction of true north. I am using the Venus GPS from Sparkfun which according to the datasheet does not populate the declination field. The alternative seems to be to try to compute the declination and then use a compass to find magn…

[SOLVED] Obtaining Magnetic Declination

kg4wsv October 21, 2012, 5:01am 4

You only have 2k of data space in the uno so no chance.

Wrong. You have 32kb of program flash and the PROGMEM macro, so if your program will fit in the 30k left, no problem.

-j

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