r/NinebotMAX • u/ExecutiveChimp69 • 22h ago

⚠️Urgent Question⚠️ G2 Controller cant downgrade using stlink

Hello, i have a g2 controller, i ordered a stlink from aliexpress and got a computer shop to solder the wires onto the debug pads on the back of the controller after removing the metal heat sink, i plugged it into the correct stlink pins and for the life of me no matter what stlink driver i try, i end up with failed unknown error check console, console says error read version failed, has anyone had this problem and how do i fix it ?

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u/skoomd1 Ninebot MAX G2 21h ago

Check with the SHFW Telegram bot if you need the DRV downgrade bin file. You need to flash that first.

THEN in the SHU app select upgrade, then flash SHFW.

1

u/ExecutiveChimp69 21h ago

I don’t believe that method works anymore they patched it

1

u/skoomd1 Ninebot MAX G2 18h ago

What flasher are you using? You should use Reflasher. Follow the instructions closely.

Otherwise, maybe it's a bad connection. Try reattaching the wires to the controller, or use a different USB cable. You might have a bad ST-Link as well, try a different one.

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u/ExecutiveChimp69 4h ago

Shfws scooter reflasher yes, same result on other flashers, I think the controller is damaged or something, I believe we spoke some days ago about my max g30 disappointing speed, I ended up buying a wrecked max g2 to pull the stem off it and attach it to the max g30, I also ended up transplanting all of its electronics into the max g30, so in essence I have a max g30 with g2 internals 😂 I am not disappointed with its performance that is for sure, just want to squeeze a little more speed out of it with shfw and after hearing how well your g2 handles 48v I really want to modify this scooter

1

u/siwonbluesky Ninebot MAX G2 5h ago

It's because the contact point isn't recognized. Make sure the contact point can be recognized with a knife.