Cool idea, but not possible. Even is sleep mode power is still drained at almost the same rate and also the back buttons cannot be used as an interrupt to wake the gun up. Only the trigger is on an external interrupt. Also the password would have to be hard coded by me and couldn't be changed by the user. I can think of a way to add a password like you said with a relatively small ammount of code though. I just think it would be easier to chain your gun to a tree because all you would have to do to clear the password is reflash the gun.Originally Posted by Jotsy