How to flash the firmware and authorization code to the device? Where can I download the flashing software?

Enter the Tuya PMS register an account, and log in. Click Download Software to download the Tuya Cloud Module Burning Authorization Platform.

For more details about the Procedure, please see: https://developer.tuya.com/en/docs/iot/overview-of-download-firmware-and-authorization?id=Ka4zcqfo0eb5u#title-4-Procedure