Andy Burns has brought this to us :
It's not that simple to "sniff" wifi traffic, you're looking at e.g. linux
with a wifi dongle in monitor mode, unless you can "rig" an extra access
point to force the device through ethernet and sniff it there on a switch
with mirror port, in short if you knew how to force it to do any of those you
wouldn't be asking here ...

Yes, I thought it might not be that easy, just asking if I might be
missing a simple way to more quickly confirm it was running.