I used a HA supervised install with GPIO pins to watch hard wired door contact sensors, zigbee contact sensors for windows and zigbee motion sensors. HA for alarm control, alert notification and picture captures. At one point I used noonlight for 24/7 monitoring, but haven’t used that in a while. A wall mounted cell phone provides a fixed location access to the GUI and cellular backup for controller communications. It’s been working well for about three years now.