If your head unit supports online protocol updates, you will see an or Cloud Download button next to the Hiworld selection. Click Update .

Using a free tool like or BUSMaster :

If you have downloaded the update package manually, follow these steps to flash the firmware into your Hiworld decoder. Prerequisites

: Most modern Android head units (like TEYES ) have a "CanBus Update" app or setting that downloads the files directly via Wi-Fi.