A few weeks ago I picked up a couple of $100 WiFi cameras from Amazon made by Fujikam.
They can be controlled from any computer, smart phone or tablet. I’m still playing around with the sensitivity adjustment on the motion sensor to cut down on false alerts on my phone.
The one labeled ‘Front yard’ is actually aimed at the front door and porch because I get a lot of crap delivered during the day when no is home. The one labeled ‘kitchen’ is is placed in the one spot where I can pan to see the front door, the back door and the door to the garage.
The first screen cap is from a PC and the other two are from the smart phone app.
In daylight the picture is great.
In low light you lose some resolution.
In pitch black darkness it’s infrared black & white.