You may try to change the channel width into 40MHz, by the way, how about the speed if you connect a computer to the tp-link router by cable?

How about the wireless link speed between your router and the wireless client? usually 2.4G signal has much more wifi interference than 5G signal especially when there are too many 2.4G signals...

What is the exact model number? AV500 is not model actually, and is there any change on the lights when it stops working?

Do you see the system led turns off when you reset it? only so, that means the reset is successful, so you may try again: with the camera powered on, press and hold the WPS/RESET button for more than...

By default, the password is also admin, so did you create a new one? or you can also try to factory reset it: with it powered on, press and hold the reset for about 10s

there is an ethernet port on the camera, so you can connect them with an ethernet cable, not so sure why you asked it