I just bought a used Asus AC2400 and I would like to flash OpenWRT to it.
I wonder if I can flash firmware from Asus AC85P ?
Or there is other solution dedicated for AC2400?
Thanks!
The OpenWrt wiki is down at the moment.
However, a google search returns
RT-AC2400 pppoe on OpenWrt 22.03
RT-AC85p and RT-AC2400 share same FCC ID.
https://wikidevi.wi-cat.ru/ASUS_RT-AC2400
Installation would probably by using SCP and SSH.
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Not unless you want a brick.
I don’t see Asus AC2400 in the https://openwrt.org/toh/views/toh_available_16128 view.
It could be in the full TOH which is having some issues ATM.
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Thanks for your answers!
First is a positive one, second is not that positive!
So, is anything I can checks before attending to flashe OpenWRT on it?
Check the OpenWrt wiki device page for the RT-AC85p.
https://openwrt.org/toh/asus/rt-ac85p
The Debricking instructions will be useful in worse case scenario.
wiki is down at the moment.
@apashi, try this archive.org page.
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I wouldn’t until the TOH issues get resolved and you can review the Device Page.
From what I can see from a forum search, you could possibly use it but really, caution is the better part of valour.
If you posses the know-how to restore OEM from a possible brick, go for it. If not, cool your heels and wait for the wiki to give you the skinny.
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When I'll receive it, I"ll give it a try on OpenWRT with AC85P files.
Cross my finger and pray for the best.
Wiki is back. read the commit.
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Updates:
- WIKI is back but I was not able to find anything specific for Asus AC2400
- I received the router and after button factory RESET, I was able to find the firmware that is running and is the latest official one:
ASUS RT-AC2400 Firmware version 3.0.0.4.382.52516
Version 3.0.0.4.382.52516 16.25 MB 2021/03/09 - I am pretty curios to see if AC85P firmware will work on it, but I also have some doubts about this ending successfully . . . .
As before, I there anything I can double check before flashing?
Is there a way to add Asus AC2400 information in WIKI and dedicated support firmware for it?
You can have me and my router as playground for this topic.
Thanks!
What’s on the label underneath? Retract any MAC address/login info.
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@Some_Dud reported running RT-AC85p 22.05 image on RT-AC2400 in Aug'22 link I previously provided.
Here's a post in Oct'22 by @dividead using RT-AC85p factory.bin on RT-AC2400.
https://forum.openwrt.org/t/issues-with-mounting-usb-drives-and-internet-speed/138541
Just check the FCC ID is the same. MSQ-RTACHV00 (Correction: it is not found on router's label)
Asus is known to assign different model numbers to the same device depending on where device is sold for reasons best known to themselves.
No real need for dedicated support if the RT-AC85p, AC65p and AC2400 are all the same device, other than updating the wiki with a note to say it also works on RT-AC2400 imho.
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Where can I find this FCC ID on my router?
Another thing that I missed mentioning is that I am from Romania, Europe and this router model might be specific for our local market.
My bad. I just examined my spare Asus RT-AC85p and RT-AC57u v1, and there is no FCC ID printed on either of them (UK models) to my surprise. It may be just US models which must show FCC ID.
I updated my previous post. Did you see comment about a second user running RT-AC85p OpenWrt factory.bin image on RT-AC2400?
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Yes, I saw it and that was why I bought this router model.
I also PM the user that did that, but no answer from him until now.
So I take a chance and successfully flashed OpenWRT 23.05.2 on my Asus RT-AC2400, using Asus RT-AC85P files.
Step by step installation:
- downloaded factory and sysupgrade files:
openwrt-23.05.2-ramips-mt7621-asus_rt-ac85p-squashfs-factory.bin openwrt-23.05.2-ramips-mt7621-asus_rt-ac85p-squashfs-sysupgrade.bin - connected my laptop via LAN port to router
- accessed OEM web interface defined admin password and enabled SSH on port 22 (under “Administration” → “System”)
- from Windows comand line I navigate to the folder where above file were saved and copied factory file to router /tmp folder, using this comand:
scp openwrt-23.05.2-ramips-mt7621-asus_rt-ac85p-squashfs-factory.bin admin@192.168.50.1:/tmp - entered admin password when prompted and wait for transfer to finish:
The authenticity of host '192.168.50.1 (192.168.50.1)' can't be established. ECDSA key fingerprint is SHA256:/kOEP8PLvAkcTQgMOuuYkwPkov1iNeUipq4xOVaFLto. This key is not known by any other names Are you sure you want to continue connecting (yes/no/[fingerprint])? Please type 'yes', 'no' or the fingerprint: Warning: Permanently added '192.168.50.1' (ECDSA) to the list of known hosts. admin@192.168.50.1's password: openwrt-23.05.2-ramips-mt7621-asus_rt-ac85p-squashfs-factory.bin 100% 9344KB 3.1MB/s 00:02 - from PuTTY I opened a new SSH session to
192.168.50.1usingport 22 - logged in with admin password and run this command:
mtd-write -i /tmp/openwrt-23.05.2-ramips-mt7621- asus_rt-ac85p-squashfs-factory.bin -d linux - then reboot the router using this command:
reboot - after reboot complet, I installed sysupgrade file via LuCI ("System" → "Backup / Flash Firmware"):
And magic happened! 
The only downside is that router model changed from RT-AC2400 to RT-AC85P, hopefully this can be fixed in the future.
Is there a way to update AC85P page with this information?
Thanks a lot for your support and guidance!
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