Ath10k monitor interface/ Wireless sniffing?

To enable the monitor interface for openwrt im guessig I just need to put this in my config :

option mode 'monitor'
option ifname 'mon0'

Then I guess I can just run cshark and capture the traffic?

Do I have to run a specific version of wpad or candelatech firmware or install anything specal ?

I'm trying to capture auth between an xbox360 and my openwrt router as I have issues getting my Xbox to connect in wireless N mode.

The Xbox connects if I force legacy mode and it was sugested by candelatech that power saving features or block-ack might be causing issues and a packet capture would help diag the issue.

The issue seems to be more widespread and there is a few threads with simular issues on the net with the Xbox and ath10k devices