VERIZON dsl router:
used arduino UNO as serial usb converter after frying my uart usb board.
Serial is 4pin J6, from left to right with ports and power jack on top: TX, RX, Ground, vcc
flashed image: openwrt-15.05.1-brcm63xx-smp-96328avng-16M-flash-generic-squashfs-cfe.bin
useful urls:
http://patrakov.blogspot.com/2012/02/recovering-bricked-d-link-router.html
https://wiki.openwrt.org/doc/techref/bootloader/cfe#bcm63xx_cfe
**** TO unbung LUCI after trying to set the router’s ip to 192.168.1.2
(reflash the router?)
from ssh or serial console:
uci network revert
uci system revert
uci commit
or uci network.lan.ipaddr=’192.168.1.1′; uci commit
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need to make LAN4 the WAN: http://oksigenasu.blogspot.it/2014/10/struggling-with-tl-mr-3240-with-dead.html
or more simply: https://forum.openwrt.org/viewtopic.php?id=57305
need / want to enable gpio and usb