[SOLVED] Cannot flash R7800 NiP Edition

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gobkriiz
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Joined: 03 Nov 2021
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PostPosted: Fri Jan 07, 2022 18:45    Post subject: [SOLVED] Cannot flash R7800 NiP Edition Reply with quote
I have come by a second hand R7800 Ninjas in Pyjamas (NiP) Edition, apparently a Nordic model, which I would like to flash with DD WRT but the router’s Web UI will not accept DD WRT ”factory-to-ddwrt.img” files. The Web UI first displays the ”Checking firmware” message, followed by ”Wrong firmware” (or something along those lines).

I have downgraded the Netgear firmware to one of the earliest R7800 releases (v1.0.0.28 ) and tried to flash with DD WRT r47618 and r47942 to no avail. I have not opened the case, but all the markings on the back (R7800, X4S) indicate that the device is no different than any regular R7800. Factory R7800 Netgear firmware can be used to upgrade or downgrade the firmware.

Does anyone have an idea whether it is possible to flash this device with DD WRT? I was considering trying the TFTP method, but I have no idea whether this could brick the router permanently.

Thanks!


Last edited by gobkriiz on Sat Jan 08, 2022 0:58; edited 1 time in total
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Alozaros
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PostPosted: Fri Jan 07, 2022 18:50    Post subject: Reply with quote
read R7800 install guide:

https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=320614

try Kong factory file: (must be logged to see it)
https://forum.dd-wrt.com/phpBB2/download.php?id=44456

try flashing via TFTP...it always works!!

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egc
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Joined: 18 Mar 2014
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Location: Netherlands

PostPosted: Fri Jan 07, 2022 18:58    Post subject: Reply with quote
Use a non chromium based browser and incognito mode.

See forum guidelines point 12c.

The install guide also has some information about it.

You can also use nmrpflash.

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Routers:Netgear R7000, R6400v1, R6400v2, EA6900 (XvortexCFE), E2000, E1200v1, WRT54GS v1.
Install guide R6400v2, R6700v3,XR300:https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=316399
Install guide R7800/XR500: https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=320614
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gobkriiz
DD-WRT Novice


Joined: 03 Nov 2021
Posts: 11

PostPosted: Fri Jan 07, 2022 19:13    Post subject: Reply with quote
Thanks for the prompt response Alozaros and egc.

I forgot to mention that I tried to upgrade by following the egc's installation guide and by using Firefox.

I will try nmrpflash or / and TFTP.
kernel-panic69
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Joined: 08 May 2018
Posts: 14125
Location: Texas, USA

PostPosted: Fri Jan 07, 2022 19:50    Post subject: Reply with quote
Seems this model is only available in specific markets; no confirmation that there is any differences in stock firmware version that prevents flashing DD-WRT, but could be something in the bootloader(?). TFTP or nmrpflash should flash it successfully, though. Caveat Emptor and YMMV and all that stuff.

https://www.snbforums.com/threads/r7800-nip-edition.32569/

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ArjenR49
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PostPosted: Fri Jan 07, 2022 20:20    Post subject: Reply with quote
I have had an R7800 NiP edition router for more than a year. Bought by mail order from Denmark together with a coffee mug with NiP logo Wink

I have never even used it with the stock firmware. Installed dd-wrt right away and never had a problem with it that would have had anything to do with it being a special edition. AFaIK it's just the logo that's different. At the time I got it, local shops had stopped selling R7800's.

I have had a 'normal' R7800 for much longer. Both behave the same way. The old one is in a remote location now.
It's great to have identical routers, especially R7800's.
gobkriiz
DD-WRT Novice


Joined: 03 Nov 2021
Posts: 11

PostPosted: Sat Jan 08, 2022 0:59    Post subject: Reply with quote
Thanks for all the input everyone.

Paperclip boot + TFTP method worked like a charm. 😊

I followed egc’s installation guide to the point and could not get the factory firmware Web UI to accept the DD WRT ”factory-to-ddwrt.img” file. I tried downgrading / upgrading factory firmware to three different versions.

I also could not get nmrpflash to work. Tried by setting the specific IP and even the Blind-mode. Each method recognized the router and started ”Advertising NMRP server on eth2”, but timed out eventually. I also tried the paperclip boot followed by the blind mode. This method stated that it tried to upload data and hang there indefinitely.
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