Right now I’m struggling with the wake up pin configuration. But I agree only walking up when the door opened would be a lot better.
There are interrupt pins specifically for this kind of thing. If the board is sleeping and that interrupt pin changes state(Door opens) it will wake the board and do whatever automation you create and then go back to sleep. I’m not a big fan of battery powered and all that but, this is a frequent conversation in the forums and you shouldn’t have a hard time finding details on doing this.