Detecting Entry into the Home: Solutions and Experiences

Hey everyone, I’ve been thinking a lot about how to accurately detect when someone enters my home. It’s a feature I’ve seen in some smart home setups, but I’m not quite sure how to implement it myself. I know facial recognition cameras are an option, but they can be expensive and privacy concerns come to mind. Are there cheaper alternatives that still work well? I’ve heard about using motion sensors combined with smart locks, but I’m not sure how reliable that is. Maybe someone has a clever workaround or a tested setup they could share? I’d love to hear about your experiences and any tips you have for ensuring this system is both effective and user-friendly. Thanks in advance for your insights!