Hi, guys your help would be appreciated, i have TL-WA855RE V1 in which i have previously installed openwrt firmware but due to low ram, it wasn't able to save configuration so after trying installing other version of openwrt my TL-WA855RE V1 got bricked and it was just flashing green light when connected to power, so i opened TL-WA855RE V1 to see inside and i found a flash chip "25q32csig" so some body told me that we can flash this chip using CH341A flash programmer as i successfully flashed my pc bios chip so i am little familiar with it , so give a go and downloaded the the firmware of TL-WA855RE V1 from there official website and unzip it and found a bin file which i then flash on that 25q32csig flash chip but after flashing the TL-WA855RE V1 it look like dead no led flashing no, no radio signal, not accessible via ethernet cable.
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Now the question i want to ask from experts here is that the procedure i did was ok or i did any mistake?
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The factory bin file is not a direct image ready to copy 1:1 to the flash. It has headers which need to be stripped out, and the space between the bootloader and the firmware padded out to be even 64k blocks.
If you no longer have the ART data (the last 64k of the flash) either in the flash chip or as a backup, that can't be replaced it is unit specific and not part of the factory or OpenWrt distributions. Without a valid ART the wifi radio cannot work.
Mk24 thank for information. I didn't backed up the data of the flash chip, so there is anyway I can get this data?
Hence this data is individual for each device...no.
Just bin your device, its dead.
Not exactly true, the calibration data is repeated on TL-WA855RE V1 sold in the same region, the only difference is MAC address which might be embedded there and which is easily replaceable.
@khattak I think You also wiped the bootloader, so the only options are buying same device and copying flash memory contents (and altering MAC in ART partition), or waiting for someone to post flash memory dump of the same device and copying flash memory contents (and altering MAC in ART partition).
You can bring it back to semi workable state by downloading vendor GPL archive, compiling U-Boot bootloader from that archive and writing it to beginning of the flash. Then running TP-LINK TFTP recovery should bring back whole firmware, except calibration data, which means no wifi.
Thanks you for the information, I really didn't know that it's my bad luck.