Standalone here refers to the AP, a standalone device, but it is still LWAPP and needs a controller.
Getting to the cisco web site, wireless download section, does not show any IOS standalone code for the 1522... which is logical, the 1522 is to be a mesh AP, which implies AWPP, which implies LWAPP... I am afraid that you will need a controller...
Transferring Crash file from standby: Login to the Active WLC in HA.
From CLI: (Cisco Controller) >transfer upload datatype crash (Cisco
Controller) >transfer upload filename (Cisco
Controller) >transfer upload mode tftp (Cisco Controller) >transfer
This is the start of a display filter cross reference between Wireshark
and OmniPeek. The 1st installment is a table of advanced filters. More
filters will be added as time allows. It is a living doc, so check back
for changes every so often Please feel f...