Converting a lightweight access point to an autonomous access point is not an easy task. First off, you must have access to the OS image file for the autonomous access point. To download this software you must have a smartnet support contract for that device. To get this support you must contact the vendor you bought the device through and purchase it. You will need a Cisco web account to log into to download the software. Once you have downloaded the software you need to put it in a location that is shared by a TFTP server.
Boot the access point and connect to it by the console/serial cable.
Commands
debug capwap con cli
conf t
boot manual
reload
set IP_ADDR [IP you would like to use]
set NETMASK [subnet you would like to use]
set DEFAULT_ROUTER [gateway IP]
tftp_init
ether_init
flash_init
tar -xtract tftp://[TFTP_IP]>/[Path to OS image(tar file)] flash:
set BOOT flash:/[image_directory]/[image_name]
“The image is the largest file that was extracted. Looks like this (/ap3g2-k9w7-mx.153-3.JC/ap3g2-k9w7-xx.153-3.JC)
set MANUAL_BOOT no
set
boot