Electronics > Repair

Unable to access UART in WAP300N

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dc101:

--- Quote from: mrmuzzio on May 28, 2021, 09:19:38 pm ---I was wondering if you tried the other modes of the router, besides AP ... since in my unit is the only one working...

Thanks!

--- End quote ---

I tried access point, and media connector mode last night and both worked fine. I didn't try the other modes.

mrmuzzio:

I've tried all modes, but the only one working is AP.

When I try the Media Connector mode, I factory-reset, set the mode and save.
Then I can not longer connect to the web interface to do the wireless survery...
It seems some settings are saved wrong .... I'll look into it again.

Thanks!

darkspr1te:

--- Quote from: mrmuzzio on May 26, 2021, 09:22:00 pm ---Despite the device seems ok, of the four modes it has, only the AP mode is working.

With the other 3, when I change the mode and hit "save" the AP restarts and I can't go on with the configuration.

Been reading the user guide (https://downloads.linksys.com/downloads/userguide/WAP300N_UG_EN_3425-01640A_Web,0.pdf) and trying different settings but none seems to work...

Luckly the reset button is still functional, so you can return easy to the Factory Settings...

--- End quote ---
I see this often with random chinese wall wart repeaters, often you have to make sure you are on manual ip for you and the router via cable, then switch modes (media mode, repeater etc) , you should still be able to ping the unit.
as for uart, yes it could be disabled in uboot, how ever if you have ssh access you should be able to output to the uart if it's seen in /dev/
also hackaday has many router hacking articles from uart attacks to patching initrd and initramfs to patch in features and tools.

https://hackaday.com/2020/10/07/hacking-a-netgear-router/
https://hackaday.com/2011/10/20/ram-upgrade-for-wrt300n-router/

darkspr1te

dc101:
That's a good point, I believe the IP scheme changes depending on what configuration you're in.

As far as SSH, no such luck. I ran an nmap scan as soon as I hooked up the AP and the only services I discovered was http and upnp. No ftp, telnet or ssh :(

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