Hey everyone, I’m trying to figure out a way to detect when my roommates leave the house without giving them any devices to carry. I have a Yale Keyless deadbolt that can tell me who enters using their code, but I’m not sure how to track when they leave. I’ve heard about presence sensors and maybe using smart cameras, but I’m not sure which approach would work best. Has anyone else tackled this problem? I’d love to hear your suggestions and experiences! 