Debricking UniElec U7623-06

Installing and Using OpenWrt
1

Hello,
during the update to openwrt 21.02.01 I did a lot of mistakes... to make it short: The Router is not Booting at all. Now I'm trying to debrick the router with the SP flash tool like the Wiki describes, but I really don’t now how to get/generate the preloader.bin file for the process.

Can somebody explain me how to make or get the preloader file?

2

http://david.woodhou.se/preloader_iotg7623p1_emmc.bin or maybe http://david.woodhou.se/u7623/preloader_iotg7623p1_emmc.bin

3

I'm also interested in the mistakes. Upgrading from the vendor's 14.04 to 21.02.1 should be simple: use the normal sysupgrade to the 'legacy' image, then sysupgrade again into the full image. If that didn't work, we should fix it.

4

Thanks for the bin Files. I will be back home on Tuesday and directly try to flash the them.

To the mistake I made during the update process: I already had the 19.07. on the router since over one year and everything worked fine. I try to updated with the sysupgrade file 21.02. from the wiki. The flash worked well and I could connect to Luci. The system asked me a lot to convert the old configuration files and the most settings were transferred but the WiFi!! The WiFi didn't show up at all... I guess no wifi modules were regcognized from Linux. Than I wanted to go back to 19.07. but just took the kernel.bin and flashed it due Luci by ignoring all warnings... Bahm that's it no connection to the Router anymore. Also I don't get any signals though the serial pins and PuTTY. Just with SP flash tool something happens when I power up.

So again thanks for the Files and I hope I can now bring it back to live and find out what went wrong wit the WiFi and 21.02. I will definitely give you an update. :+1:

5

Debricking Woks!!!

I used your second link for the .bin file and renamed it:
http://david.woodhou.se/u7623/preloader_iotg7623p1_emmc.bin

and the scatter and the img from the official 21.02.1 release:

https://downloads.openwrt.org/releases/21.02.1/targets/mediatek/mt7623/openwrt-21.02.1-mediatek-mt7623-unielec_u7623-emmc-scatter.txt

https://downloads.openwrt.org/releases/21.02.1/targets/mediatek/mt7623/openwrt-21.02.1-mediatek-mt7623-unielec_u7623-emmc-squashfs-img.gz

Now I can access to Luci and ssh as usual... May its a good idea to rename and upload the .bin file to the official Release path???

BUT: still no WIFI --> I will open a new topic for that. Thanks anyway for your help until now.

6

Yes, we should make the preloader available for download even though it's only a binary.
I'll look at doing that.

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