how to wake up from deep sleep mode using button long press

Hello everyone,

          in one of my project i have to implement button functionalities. using single button, I have to put device into OFF mode and also wake up from OFF mode. i need to perform this two operations with button long press for 5 seconds.

that means, If I press the button for 5 sec then device should turn OFF and same way if I press the button for 5 seconds the device should turn ON. 

I have implemented logic for device turn OFF and its working fine as if press button for 5 seconds the device is turning OFF. 

but I am not sure how to implement button long press to turn ON the Device. 

kindly any one help me to resolve this issue. 

Thank you

Srinivasa M

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