making the ubnt wifi awesome (uap ac lite) w/ lede (openwrt)

the reasons you would do this:
- you get 802.11r
- you get better roaming
- you get access to some new 5ghz channels

I AM NOT TO BE HELD RESPONSIBLE FOR ANYTHING IN HERE. DO AT YOUR OWN RISK. THANK YOU AND HAVE A LOVELY DAY.

** note that though we're using Lede, it's essentially openwrt minus the drama

lots of info here: https://wiki.openwrt.org/toh/ubiquiti/unifiac

if your AP is already on a unifi network (i.e. not new)
  - make sure that the online uniquiti interface isn't auto-updating it back to the latest version
  - as per https://discuss.cucumberwifi.io/t/openmesh-1750-ac-unifi-ac-lite/258/42, downgrade the ubnt to 3.4.7:

  it's here: https://s3-eu-west-1.amazonaws.com/ps-firmware/_other_/firmware/U7PG2/3.4.7.3284/firmware.bin

  - scp it to root@ubnt_ip_addy /tmp
  - then 'fwupdate.real -m firmware.bin'
  - ok now it's downgraded, time to install lede

ar71xx is the cpu
you'll be installing from trunk, so there'll be some excitement. (no gui for example)

image at:

https://downloads.lede-project.org/snapshots/targets/ar71xx/generic/lede-ar71xx-generic-ubnt-unifiac-lite-squashfs-sysupgrade.bin

- scp it to root@ /tmp. it's the same ip as before since it'll still be on ubnt firmware, just older. if you're updating a fresh uap-ac-lite, the username/password to ssh is ubnt/ubnt
- ssh in and run

mtd -r write /tmp/lede-ar71xx-generic-ubnt-unifiac-lite-squashfs-sysupgrade.bin kernel0

- if it reboots back to the regular ubiquiti firmware, you didnt downgrade (only applicable for non-fresh APs)
- ok now it starts lede. note there will be no web browser because it's on trunk
- scan your network to find out the ipv6 address and ssh in. alternatively change your ip to the 192.168.1.X range and ssh into 192.168.1.1
  for example: ssh root@fe80::822a:a8ff:fe49:2859%en0

- set a password using the 'passwd' command
- before we get the webui up lets clean up a bit more

/etc/init.d/firewall disable
/etc/init.d/firewall stop
opkg remove dnsmasq
reboot

- ssh back in, lets hope stuff still works
- run 'opkg update'
- run 'opkg install luci-ssl'
- now you should be ableto use the web interface at http://10.0.1.37
- ok now go through all settings and set things up right for yourself. i do the following:
  - System>System and change hostname
  - System>Adminsitrator and put your ssh public key
  - System>LED Configuration and add white:dome (unchecked state) and add blue:dome (checked state)
  - Network>Wireless and add your networks. after enabling the 5ghz network, it can take a minute for the interface to actually enable

ok now lets add 802.11r for fancy roaming between devices. back to the terminal

opkg update
opkg remove wpad-mini
opkg install wpad
/etc/init.d/network restart

# mobility domain can be anything, must be same between all aps though
uci set wireless.@wifi-iface[0].ieee80211r='1'
uci set wireless.@wifi-iface[0].mobility_domain='e612'
uci set wireless.@wifi-iface[0].pmk_r1_push='1'

# these numbers are the MAC address of the interface you want 802.11r for
# (based on https://www.reddit.com/r/openwrt/comments/515oea/finally_got_80211r_roaming_working/)
uci set wireless.@wifi-iface[0].nasid='44D9E79239B0'
uci set wireless.@wifi-iface[0].r1_key_holder='44D9E79239B0'

# these should be the same for all your APs. you need a line per AP (for both r0kh and r1kh).
# that last mumbojumbo is a password, change it to something unique for you.
# the pattern should be obvious, basically all your MAC addresses sometimes with : and sometimes not
uci add_list wireless.@wifi-iface[0].r0kh='44:D9:E7:92:39:B0,44D9E79239B0,8a7fcc966ed0691ff2809e1f38c16996'
uci add_list wireless.@wifi-iface[0].r0kh='44:D9:E7:92:3A:00,44D9E7923A00,8a7fcc966ed0691ff2809e1f38c16996'
uci add_list wireless.@wifi-iface[0].r1kh='44:D9:E7:92:39:B0,44:D9:E7:92:39:B0,8a7fcc966ed0691ff2809e1f38c16996'
uci add_list wireless.@wifi-iface[0].r1kh='44:D9:E7:92:3A:00,44:D9:E7:92:3A:00,8a7fcc966ed0691ff2809e1f38c16996'

# kick off bad low signal clients
uci set wireless.@wifi-iface[0].disassoc_low_ack='1'

uci commit wireless
/etc/init.d/network restart