Turn Guided Access on and off with a keyboard

We have an ipad that is in a protective case that removes the ability for a user to get to the on/off and volume buttons. We want to use the ipad in a kiosk and turn on Guided Access. However, getting the ipad in and out of the kiosk is time consuming (on purpose) and its impossible to get to the buttons without removing the ipad from the kiosk. We have a bluetooth keyboard (from apple) connected to the ipad. is there a way we can enable and disable Guided Access using the keyboard so we dont have to get to the on/off button?