TL-WR2543ND v1 - ART partition lost during recovery

Installing and Using OpenWrt
1

TL-WR2543ND v1 - ART partition lost during recovery.
Can anyone share their art.bin dump from /dev/mtd5?
dd if=/dev/mtd5 of=/tmp/art.bin

Thanks in advance.
Edgardo Lang.

2

ART is device specific, it's generated based on calibration tests at multiple frequencies/ temperatures for the component variations of your specific device during manufacturing. It's not possible to recover this (without six figure measuring equipment and NDA'ed tools from QCA).

Unless you have a backup from your own device, it's dead, Jim.

3

Think youre exaggerating, will work just fine with dump from other device of exact same model

4

I am not - and I am familiar what actually is inside ART (and that it really differs between every device). Will the wireless come up with a wrong ART, probably, but it can never operate in a regulatory compliant way anymore, center frequencies will be off, tx power off-spec and all of that will drift based on the temperature. Performance and range will be affected, clients may not even manage to properly tune into this mis-tuned AP - and operating the device would be illegal.

Would you advise someone with -15 dpt on the left eye and +15 dpt on the right one, who has forgotten their glasses and hearing aid to parallel park your car with its slightly wonky clutch on a steep hill?

5

From experience - there is no noticible difference after cloning. WiFi comes up, clients connect, speed, range, stability looks the same. +15dpt and -15dpt.. No dont think so :slightly_smiling_face:

6

Hi,
Without getting into any arguments, and although I agree with SLH that RF devices should be individually parameterized due to the inherent variations in electronic components, connector losses, antenna intermodulation, and a very long list of other factors, I seriously doubt that router manufacturers calibrate each unit individually before packaging a few hundred milliwatts for sale. This isn't even done with radio transceivers that handle hundreds of watts, and I know a lot about that.

I believe they are parameterized in batches of components, obtaining more than sufficient results for their intended function. Therefore, and here I agree with pwsxc, I think that an ART of the same model and version should, in theory, work reasonably well.

Regards,
Edgardo
LU9DLJ

7

Let's keep in mind, we're talking about a 14 year old 8/64 device with non-concurrent 'dual-band'. Even the 8/128 concurrent dual-band tl-wdr3600 sells for 5-10 EUR/ USD on the various used markets, in fully working- and specs compliant condition.