How to downgrade Ninebot One / Ninebot Mini / Pro electric unicycle firmware?

ByAdan Flannigan 2019-10-16 952

Ninebot-Segway update the firmware version regularly. In order to fix some bugs and improve the user experience. While you may tired of the new firmware and want to return back the original version. Now, we provide a way for your to downgrade Ninebot One / Ninebot Mini / Pro electric unicycle from version 3.5.1 to 1.2.7 of Ninebot APP.

How to downgrade Ninebot One / Ninebot Mini / Pro electric unicycle firmware 

Configure on the computer

Step 1: Download the package to your PC and unzip the.zip on the partition of the disk where your system in general C is located:

Step 2: Simultaneously press win+R to bring up the window below (Execute)

Step 3: Type cmd and click “OK"

Step 4: In the window that appears, type: ipconfig and confirm.

Step 5: Carefully note IPv4 on a paper e. g. 192.168.0.155 on the example below.

    Also note the default gateway: 192.168.0.1 on the ex. You will need it later to configure your phone.

Then go search following this path C:\9BDgrader\Posadis 0.60.6\Config\ninebot. cn. prm.

Step 5: Right-click on the file ninebot.cn and choose open with, use the notepad application and replace the values of the 3 IP addresses that appear with the IPv4 address of your computer that you noted previously. see example below.

Step 6: Save the file and close notepad.

Step 7: Launch the C:\9BDgrader\Assemble.bat application

Step 8: Enter the number from 1 to 9 which corresponds to the firmware you want to install and confirm.

Wait until the following window appears

Step 9: Confirm by pressing any key.

How to downgrade Ninebot One / Ninebot Mini / Pro electric unicycle firmware

Then you have to start the HTTP server

Step 10: Double click on startwebserver: C:\9BDgrader\startwebserver.bat

If you have a security window accept the execution (see below)

How to downgrade Ninebot One / Ninebot Mini / Pro electric unicycle firmware 

If this window appears: allow the application to access the Internet via the firewall.

If you have disabled your firewall before there will not be this window.

The window below must appear permanently and confirm that the HTTP server is working (no need to go further if you do not see it for more than a second)

Note: I have never been able to see it appear on w10 even if I disable the firewall and antivirus. Under XP it appeared at the first attempt with the firewall disabled. However, Vik's confirmed to me that it works on w10, you have to check that port 80 is open. win+R/cmd/ then type netstat validate and search in the list for the app that uses port 80.

Starting the DNS server

Step 11: Double click on startposadis: C:\9BDgrader\Posadis 0.60.6\ startposadis.bat

Allow if the security window appears:

This window must appear and validate the operation of the DNS server.

Your servers are ready to replace Ninebot

Configure on your mobile phone

Note: the APP Version must be 3.5.1

Step 1: Open the APP, enter your login detail to connect Ninebot One electric unicycle.

Step 2: Configure the phone to communicate with the servers.

Step 3: Open WiFi settings on your mobile phone, long press your local network and choose “Modify network" 

Step 4: Input the WiFi password, and click “advanced options".

Step 5: Click “state" under IP settings and type ype any unused IP-address in your networks ip-range. In my example I’ve changed the last digits from 155 to 120.

Enter the default gateway address that you noted in step 4.

How to downgrade Ninebot One / Ninebot Mini / Pro electric unicycle firmware 

Don't forget to fill in DNS 1 and 2 with the IPv4 address of your computer noted in 4 (it will become your server for the downgrade)

How to downgrade Ninebot One / Ninebot Mini / Pro electric unicycle firmware 

Step 6: Open an internet browser on your phone and type in the address: www.ninebot.cn

● If you open the official Ninebot website you have made a mistake on the DNS server settings.

● If you have a not found page type error it may come from ports 80 or 53 that are blocked by the firewall or antivirus.

disable them and try again.

● If you have You are ready to firmware ninebot one! By MRN76 you are a leader and you are ready for the downgrade!

Step 7: Turn on the Ninebot One electric unicycle and connect it to the app

You have a notification for a new firmware version 1.4.2. (actually it's your downgrade in disguise here 1.2.7)

After completing the firmware downgrade the Ninebot One electric unicycle will restart and the app will ask you to reconnect

Notice: We remind you that these operations are not without risks: something during the flash can go wrong, the higher power could wear the mechanical parts faster and, finally, the safety of the vehicle will decrease significantly. GearBest blog is not responsible for any damage.


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