I've got a TP-Link TL-WN722N wifi adapter which I believe allows monitoring/injection to a network (was reassured by the comments of other users). When I follow a guide by Vulnerableuser I can get to the stage where I am sending deauth packets to the target MAC Address via the AP, but I don't seem to see a a WPA Handshake.
My question is, How long should this deauth approach take to successfully receive the handshake? I understand that there isn't a fixed amount of time for this to occur, but what would this time be on average - a few hours, days, weeks!?
I can confirm that there are devices connected to the network being two desktops, one mobile, and one tablet (mobile and tablet being the ones connected via wifi). Since they are all using the same AP and WPA2 Key, this shouldn't have any effect on when a handshake should take place (can someone please confirm this?).
Any insight to this would be a great help.