The ST-Link method is usually employed when you need to downgrade or update the DRV firmware to versions not supported by mobile apps. You would connect an ST-Link programmer to your scooter's control board and use specific software to update or downgrade the DRV firmware. prodentim What software t...

Consider flashing the original firmware back onto the scooter. This can help revert any changes made during the custom firmware flashing process. Ensure that you use the correct firmware version for your specific scooter model.
rice purity test