ScooterHacking.org

Hi,

Recently, an issue with downgrades from Chinese boards appeared.
It would seem that some scooters with a high DRV version, usually 2.x, can't be downgraded back to OFW.

If it happened to you, could you please write down what happened, what did you try, which model of scooter you have and which DRV version was on it? And more importantly, did you succeed in the end ?

Thanks to all of the people who can give information, it might help in finding a solution

Hello
I got that issue too, the sollution is to disconnect the board from internal battery, connect it again and flash the cfw.

Does not work in case of Error 7 (chunk error)

Does not work in case of Error 7 (chunk error)

Could you please explain more what you mean?

Hi all

I have the same problem. I can't update the DRV after Esmax. Error 7 (chunk error)

Hi all

I have the same problem. I can't update the DRV after Esmax. Error 7 (chunk error)

connect another internal battery, this should work

Hello,
If you get that famous error 7 because of ESMax, connect to your scooter using ES Rollback and select Main controller and 1.3.3
Click on next and generate the bin file
that "recovery.bin" can then be flashed to the main board using ST Link and will unbrick your scooter