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I want to implement a Metal Detector app which will react to a magnetic field in the phones surroundings.
How do I read the magnetic field readings from the magnetometer on the iPhone? Does anyone have sample code for accessing the magnetometer readings directly?
Thanks!
I would recommend you look at the O’Reilly book called iOS Sensor that is coming out. They have an entire chapter (6) on the magnetometer and a sample app.
iOS Sensor Programming
Apple Sample Code for Reading the Raw Values from the Magnetometer