Phone Attitude(Device orientation)
#1
I am having trouble finding any sources online about how to obtain the device orientation. If anybody has any knowledge about any libraries or maybe some global value that tracks this.

I am trying to modify this compass app https://gitlab.com/lgtrombetta/compass/ to allow compass to function when in any orientation(not just with your phone flat).
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#2
The accelerometer readings are under /sys/bus/iio/devices/iio:device*/ where * stands for an integer depending on the kernel being used. The correct device is the one having an in_accel_x_raw file (and several other similar files, all giving you accelerometer readings if you cat them).
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#3
I was hoping there might be some kind of global value that has been through a filter combining the gyro and accelerometer. Maybe the one the OS uses for screen rotation?
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