[OpenWrt-Devel] Netgear DM200 Boot Issue/Patch Availability?

Alberto Bursi bobafetthotmail at gmail.com
Tue May 28 08:51:34 PDT 2019


Last attempt I saw was here https://github.com/openwrt/openwrt/pull/1770

but it was rejected.


I have some experience with the bootloader used in this device, I can

provide more complete instructions to do the uboot fix though.

TTL/serial access seems to be easy (there is a header as you see in the 
photo),

and you need an inexpensive "arduino USB-TTL dongle" to connect to this 
device.

Connect the pins as defined in the wiki, open up your serial

communication program (Putty usually)

and set it for 115200 serial speed, others default.

Then boot the device, press a key to stop boot when you see

"Hit any key to stop autoboot: 2  1  0"

It should stop and accept console commands.

then copy-paste this line

setenv sleep 1;nmrp;sf probe 0:3;sf read $loadaddr 0x30000 
0x400000;bootm $loadaddr

This will alter the bootloader configuration that is causing the issue. 
Now it will boot kernels up to 4MB big

Will still be able to boot stock firmware, we are just increasing a size 
limit.

and then save the change by writing

saveenv

and then you can reboot the device by pulling the plug or writing

reset

Now you can install OpenWrt as normal.

-Alberto


On 28/05/19 14:00, Chris wrote:
> Hi folks,
>
> I was wondering if a patch enabling this device was ever released?
>
> http://lists.infradead.org/pipermail/openwrt-devel/2019-January/015556.html
>
> The wiki suggests one can only install/boot into OpenWRT by wiring up 
> a JTAG/serial interface and manually intervene... Which is far beyond 
> my comfort zone.
>
> Am very eagar to make use of this equipment, so any news would be 
> really appreciated.
>
> All the best,
> Chris
>
> _______________________________________________
> openwrt-devel mailing list
> openwrt-devel at lists.openwrt.org
> https://lists.openwrt.org/mailman/listinfo/openwrt-devel
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