jailbreak - Programmatically put an iOS device to sleep -

I was thinking that there was a way to put an iDevice for programming, tweak to my escape I also Would like to test that if the iPhone is also on, then is there any way (public or private API) that can do this? Even the simulation of the press will be cool. I know that catalyst cydia tweak can do this, just wondering how.

Personal methods SpringBoardServices .framework :

  Zero * SBSSpringBoardServerPort (); Zero SBLockDevice (Zero *);  

Use this device to lock it:

  SB lockdivis (SbSpringbord serverport);