Unable to flash the stable image file for my Linksys WRT3200ACM

I have attempted to flash my WRT3200ACM with the "lede-17.01.4-mvebu-linksys-wrt3200acm-squashfs-factory.img" file. I have downloaded the file a couple of different times and validated both of the files checksums prior to attempting to flash my router. I've attempted to start the flash process via several different browsers. Specifically the Edge browser, the Brave browser and the Epic browser (the later two are chromium based browsers). The specific error being returned (obtained by viewing the details of the process) is "Fail - JCGI return: error - Request Entity Too Large". I've renamed the file too, in case the file name caused an issue with the process. Specifically, I shrunk the file name to simply "factory.img".

Any thoughts on this particular error? Or, has anybody else experienced this issue?

If this is a newer WRT3200ACM, Linksys has switched to Winbond, which is causing various issues.

There is no current stable version that supports Winbond.

Is there a way for me to determine if my router is using Winbond?

If you don't have a serial connection, probably all you have to go by is DoM, if >= ~17-12-11 probably has new flash; but would fully expect a stable build to not be a problem unless due to this being the cause. The resolution is to be had, but currently you will have to build it yourself, or take a community build.

Threads related to issues flashing WRT3200ACM and Winbond chip...


The error message is indicating the firmware is too large for the flash, which at face value, seems to be incorrect...



You might try using TFTP to flash.

I am having this issue with a newly purchased router, using openwrt-19.07.1-mvebu-cortexa9-linksys_wrt3200acm-squashfs-factory.img.

This thread is the latest I can find with google, and it is two years old - sorry for the necro.
Is there a solution so I can use openwrt on my 3200
Thanks :slight_smile:

Something more recent

Thanks for the link.
I cannot see how it relates to my issue though. Possibly I was not clear.
When I attempt to install the image - the router refuses with an image too large error. as mentioned earlier in this thread. I have no problem with stock images or partitions.

I assume this is not a common issue as google throws up almost nothing.

This too large issue is a red herring I think. If you can get away from the image currently in place(that you are trying to flash from_, you can probably flash to the one you want. Try another image, any image, such as the latest OEM if that is not what is currently running.

I am currently running latest OEM.
I will look into how to follow your advice.
Thanks again.

Meanwhile if anyone reading this has been through this process any tips appreciated.

I found the problem. A very strange issue.

It was failing because I had a USB storage device attached to the router.

I removed it and then the flash proceeded ok.

This post was helpful.


Thanks for the replys and the headsup about the red herring.

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