– Communities like MHH Auto , Digital-kaos , or Reddit r/CANBus sometimes host legacy updates. However, check MD5 hashes against any official release notes.

: Download the correct protocol box upgrade software (typically an .iap or .can file) and copy it to the root directory of a USB flash drive.

For manual firmware flashing, follow these steps provided by Hiworld Support:

There are two main ways to update: (through the head unit's interface) or Manual (using a USB drive). Method 1: Manual Update (USB Drive)