Add support for Xiaomi AX1800 Wifi 6 router

For Developers
86

i think wifi 4 is only for 2ghz N , and if you use 5ghz only go with 5ghz channel A and 5ghz chanel A only 20Mbps max

Screenshot_4

87

i almost forgot, N channel only support 40Mhz bandwith or channel width in 5ghz, so try setting, the AX1800 40mhz

88

Capture winfi 1
Capture winfi 11719×186 127 KB

These are the results in winfi. I can't understand the limitation on the xiaomi..

89

Capture winfi 2
Capture winfi 21619×123 34.9 KB

and from my isp box

90

Have you tried disabling MU-MIMO option and enabling the Wi-Fi 5 compatibility mode from wireless config menu?

91

Didn't see it mentioned but the exact same process to gain permanent ssh/telnet access and be able to permanently change the router's CountryCode for the AX3600 works perfectly on the AX1800 with the same crash_unlock.img and instructions.

Download the crash_unlock.img file from here:

Follow this guide:

92

I tried this too. Think i'm gonna give up...

93

What wireless card is in your laptop?

Also I think maybe you need to do a full reset on the AX1800 and start from scratch.

Before the reset you can achieve permanent ssh to make it easier afterwards.

95

A little bit off, but... FW 1.0.385 was pushed on my router recently. Was anyone in similar situation brave enough to experiment with the SSH hack? I mean if it still works or just bricks the whole thing or... ?

1 Like
96

I did the bdata ssh perm mod a while back so I didn't have to worry about ssh hack access getting blocked.

97

I find my router updated with version 1.0.385 on returning from vacation .. and no more root access

What can I do to find it?

Thanks for your help

98

After Easter I'll order a standby router (a white ax1800 this time, 'cause why not). Before that I can't risk disconnecting from the internet for days in case something goes wrong.

So my best bet is downgrading back to 1.0.378 and do the ssh exploit again. Google for miwifi_rm1800_firmware_ed621_1.0.378.bin to find an old firmware.

For permanent ssh (Gingernut's 'bdata ssh perm mod') the best source I've found so far is this, note the github link with all the scripts that cover the steps of the original chinese article. Again, don't send your S/N to anywhere, the scripts will generate telnet password too.

1 Like
99

I am wondering if my /etc/rc.local still exists or if it was overwritten or destroyed by this update.

I have no tools to find out.

100

You can downgrade to the official 1.0.378 fw and use xqrepack https://github.com/geekman/xqrepack to generate a 1.0.385 rootfs image with ssh enabled and flash to the secondary rootfs partition.
Xqrepack will remove the xiaomi data collection software, so after flashing the rootfs partition the Miwifi app will not work.
Xqrepack is is compatible with the AX1800 firmware image, you must use the --data flag in the ubinize.sh step https://github.com/geekman/xqrepack/issues/1

1 Like
101

I downloaded firmware version 1.0.378 but upon flashing from the web interface, I get a “File verification failed” error. I’m currently running version 1.0.44.
Any advice please?

102

Is yours an international device?

edit: Just checked and 1.0.44 is a Redmi AX5 firmware, 1.0.378 is for the Xiaomi AX1800.

103

@GilDev You can download firmware here : https://xiaomifirmware.net/xiaomi-router-ax1800/

104

During the re-installation of firmware 1.0.378 I unchecked the automatic update option and for now it remains in this version.

When I came back from vacation and the router had made its update automatically, I immediately had problems with the Iphone of the house : loss of wifi calls and especially battery drains.
Since the re-installation of the firmware yesterday, problems with battery have disappeared.
This may sound very strange, but it is so.

105

AX1800 exists today in two forms: black@tower and white@classic. They did it most probably on purpose.
So one fair question: Does the firmware under xiaomifirmware.net fit both?

(I don't think so. I have both devices, just opened the box of the white (standby) one. What I already see from its setup wizard is that it has an international firmware, so MUST differ from the black one. I assume as soon as I'll finish setup it will upgrade itself to the latest FW right away. I'm afraid after downgrading I'll most probably end up with one working and one bricked device...)

EDIT: google images returns the black model for "xiaomi rm1800". But I'm still not 100% sure.

106

Is there a serial connector on the AX1800 like the one on the AX3600, I would like to know it to avoid breaking the case for nothing.
Does anyone have started to adapt openwrt for AX1800 ?