You have to use an ST-Link to downgrade to DRV255, which means soldering wires to your control board. We don't have an ETA on when a wireless downgrade method might become available.Hello to everyone!
I have bought ninebot E22D few days ago.
I would like to unlock the maximum speed on it. After connecting and activation it upgrades to DRV 2.6.15
I read the topic and answers. As i understand, i should to downgrade the firmware before i can change SN or change region.
I have found this link with edited firwares https://files.scooterhacking.org/firmware/e-series/DRV/
there I found that latest firmware is DRV271 - but it is higher than the latest on my scooter. That's why I thought that this firmware is for E25 or E45? Am i right?
I dosn't have android devicе - only windows laptop. So i don't want to make a mistake and flash first DRV271 from the link above and after downgrade to lower version.
Does anyone have a solution or advice on how to do it right?
That's what happens when you use a D serial number on some of the newer software versions. Unfortunately, the only solution at the moment is to use an ST-Link.PLESE HELP ME !!!!
I have an E22E with external battery . FW DRV 2.7.5 , BLE 2.1.3 , BMS 1.6.0 . All was ok until i "decided" to change the serial number . For a mistake i changed serial number from N2GZ.... to N2GY.... .
NOw the scooter is recognized as a E25D ( 20km/h) from scooterhacking utility and as unknow model from other softwares ....
NOW I am unable to re-change the SN back to N2GZ.... and if i try to downgrade DRV firmware i receive update error !!!
Someone could help me ??
Thanks in advance ...