DVR firmware help

HAccord8

I unintentionally tried to downgrade my DVR 2k that came with firmware V0.0.21 to v0.0.20 and it does not getting detect any more and LED keeps on flashing now. I found the v0.0.21 from DuduOS Telegram channel but that did not fix the issue. It detects the camera but says no firmware installed with black screen.

Firmware that it came with

After trying to downgrade v0.020 and then try to update to v0.0.21

I used two different memory cards one 64 GB, one 16 gb sandisk ulta with fat32 formatted and file on root folder

Please tell me how to fix it

FW_CarDvr_335_0.0.21_F_DUDUAUTO

DUDU-Meng

HAccord8
You can try upgrading to version 21 again, and test it by swapping out several SD cards and repeating the process.

DUDU-Meng

HAccord8
The V21 version you downloaded should be fine. Please try to see if you can downgrade back to V20.
If neither works, then there might be an issue, and there may be no solution.

Christian_S

HAccord8

Hello, could you please share 0.21 fw version here? I cannot find it on forum.

Thank you

HAccord8

DUDU-Meng yea i tried with the version i found on telegram and no luck.

Can you send me the version here, i can try again with it?

HAccord8

@DUDU-Meng the version i found on TG is this v0.0.21 and it did not work and the v20 which first broke it that is not good either. If you can attach the v21 here i will appreciate it

HAccord8

@DUDU-Meng can you provide me the firmware that works please? Or otherwise i will return and reorder and waste all money on returning etc, which i dont wanna do.

DUDU-Meng

HAccord8
The firmware I have here is the same as the one you have.

HAccord8

Christian_S no it was faulty firmware given to me by someone on TG channel and it broke my DVR. Better not install it.

DUDU-Meng

HAccord8 Version V21 updates the card-writing driver and is upgrade-only. Downgrading after upgrading to V21 may cause issues with the card-writing driver.