The End to end operation feature is made for door locks where a key turn does not turn the Danalock. We call this kind of cylinder a not synchronized cylinder.
By turning the key the Danalock does not move and therefore the Danalock does not change state.
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By activating the End to end operation feature and calibrating the lock, you simply tell the Danalock to operate the lock in the direction you asked for regardless of the status of the lock. (Locked/Unlocked)
HomeKit: On the Danalock V3 HomeKit, activate this feature by giving 6 clicks with a paperclip in the small hole on top of the lock.
See a list of all click commands here.
Note: As a result of activating this feature, the status (Locked or unlocked) in the Danalock app will not show. This is due to the fact that we don't know for sure what the correct status is of the lock cylinder.