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Subject: Re: Initial flashing for TPLink TL WDR3600
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From: Eugene Grosbein <eugen@grosbein.net>
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Date: Fri, 9 Oct 2015 01:43:49 +0700
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On 09.10.2015 00:39, Eugene Grosbein wrote:

> About reflashing.
> 
> I've just built tl-wdr3600.factory.bin using HEAD sources and instructions at
> https://github.com/freebsd/freebsd-wifi-build/wiki/TPLink-TL-WDR3600
> 
> My device has "TFTP auto recovery" described at
> http://wiki.openwrt.org/toh/tp-link/tl-wdr3600#tftp_auto_recovery_in_revision_15
> 
> It sends tftp RRQ "wdr3600v1_tp_recovery.bin" just like that article says.
> Is it possible to reflash the device to FreeBSD using this tftp method?

It seems, no :-(

First, I've tried to supply device's TFTP client with 5.6M of tl-wdr3600.factory.bin
renamed to wdr3600v1_tp_recovery.bin and it downloaded it but rejected -
it rebooted with original firmware.

Than I padded tl-wdr3600.factory.bin to the size 8192512 wih 0xff bytes.
TFTP client downloaded and obviously flashed it but that bricked the device,
as it does not complete boot now and keeps resetting every 3 seconds or so,
blinking its LEDs.

It seems I need TTL cable after all.