I'm looking into 2-3 wireless cameras and some movement trigger sensor for home security. Besides security, we are getting a dog and I want to see what she is doing when we are away. If anyone has good ideas, links to equipment they used, or just want to share their experience with HASS in regards to home security, it will be appreciated. Link to some good project is also great :) (I only played with is and connected few sensors I made with ESP32s)

For any camera that provides an rtsp stream, you can use frigate[1], which has some excellent detection algorithms (it differentiate between people, dogs, ...). It also has hooks to integrate with HASS. I use it with a LaView system to monitor my external cameras and get notifications (including push to my iphone) through HASS.

[1] https://github.com/blakeblackshear/frigate