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Strong wake up IOS device from trouble-free sleep

If I enable the proximity sensor on the device using:

[[UIDevice currentDevice] setProximityMonitoringEnabled:true];

Works as expected. However, I have a timer running on a background thread and when I would like the device to wake up. If i call

[[UIDevice currentDevice] setProximityMonitoringEnabled:false];

Until the screen is turned off due to the proximity sensor, the device will not wake up. Instead, I need to move the device again and it will wake up with the sensor disabled.

Is there a way to make the device / screen wake up? Is there an alternative way to save battery power? I believe that just setting the screen brightness to 0.0f does not turn off the backlight.

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You can try this method. Don't know if this works for your case.



- (void)lightenTheScreen
{     
    [[UIApplication sharedApplication] setIdleTimerDisabled:YES];
    [[UIApplication sharedApplication] setIdleTimerDisabled:NO];
}
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