Does the Iphone 1/2 have a compass inside?

Question

Can one be simulated by periodicly syncing with GPS and in the meen while working with the accelerometer? I know for example that the N95 accelerometer is invarient to rotation on the Y axis (while beeing face up/down).

Answer 1

The original iPhone and the iPhone 3G use GPS to calculate the heading, however the iPhone 3GS now has a 3-dimensional magnetometer compass in it.

This can only be done taking two GPS coordinates (while moving) and determining the direction from point A to B.

Answer 2

iPhone doesn't have a built in compass; but there is one created in software. It's called Compass Free , and unsurprisingly perhaps, it's free.

Answer 3

额外信息：IPHONE 1没有GPS或指南针。