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Originally Posted by Jose
Does the Kindle Paperwhite 12 use an accelerometer for the double tap to work? Does this mean that it doesn't have an automatic screen rotation option simply because Amazon doesn't want it to or because it needs another component for screen rotation to work?
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We don’t really know yet how Amazon implemented the double tap feature. An accelerometer is a likely candidate but Amazon never advertised the PW or CS as being equipped with one, and indeed the fact that the devices supporting double tap don’t support automatic rotation seem to point to something else being used. Furthermore the double tap is only available on the PW Signature Edition model and the Colorsoft, both of which have extra hardware over the regular PW (wireless charger and light sensor).
Then again it is possible that Amazon just doesn’t want to bring automatic rotation to the Paperwhite/Colorsoft range as they deem the form factor unfit for it. It’s a bit like the Scribe, which does have an accelerometer, but will only allow 180 degree rotations; this is clearly a deliberate software limitation, as the Scribe does support landscape mode, but it can only be activated via the menu.