AutoVoice Wake up phone with autovoice

Hello,
Is it possible to wake up a phone with autovoice using "Ok google" command ? I have red lot of things about that in forums, but i haven't found task samples... (for the moment, we could consider that phone has not lock)

Thanks a lot for helps !

 

Hello,
Yes, i would like To turn on the screen. I found solution using autovoice continous mode but it uses battery a lot. Is there another way to do that ?
Thank you

 

The loop is looped
I wanted to use Autovoice because "ok Google" doesn't work when the screen is turned off and i haven't found option to make that possible (I presume it was only on android previous version or on specific phone model). So i will still use home button
(not really easy when hands are occuped). Thank you

 

So i think i will make a task for disable savescreen only during time i haven't hands free (with time i will set), it is probably the best way for economise battery, and easy to do with tasker.