how to use wireshark for all packets coming to my router

edit

Do you have ssh access to your "Router" and can you run tcpdump on the Router? Then you could ssh into it and feed the tcpdump output into your local running wireshark.

There is dozens of tutorials.

for example here is a short one: https://kaischroed.wordpress.com/2013...

If you can't tcpdump packets on your router, the easiest way is to outsource the Wifi from the router (if not spearate anyway already) and put a switch which has a monitor port in between the the WiFi Access Point and the actual router.

hope that helps.