I’m trying to get started with a least one camera for my front porch to play with before buying others. I need a camera that will alert me when someone steps onto my porch and set off an audible alarm inside my home. Even better if it could make a light flash, hard of hearing folks. I can’t figure out if BI can do this or is it the camera that does this. Or combination of both. Or can’t be done. So a single camera recommandation would be appreciate. $100 range or less would be best for me. Thanks