Okay, here’s part of my setup - I have a motion sensor set to turn on basement lights when motion is detected, then after 5 minutes some of them to turn off, after 15 minutes others turn off. Contact sensor for open/close doors I get alerts that door was open/closed. Also use an contact sensor in mailbox, when door opens I get alert and have a light come on, other members in house know when mail has arrived. I have also tested sensors on dryer, to alert cycle complete. For hearing impaired the sounds may not be heard. I have lights flash when doorbell is pushed, again a hearing impaired person may not hear the doorbell ring. I have tested many other ideas as well. Both indoors and outdoors. For visually impaired, I have an Alexa announcement, ‘you’ve got mail’ on one of my echo dots. Contact sensor used to turn on light when closet door opens. Just a few basic things to do with motion/contact sensors, other than a camera motion sensor. I could use cameras for some things but not all.