There’s a tool for this. Read the section Complete guide: getting the Device ID and Local Key with TinyTuya here.
Protocol notes, for anyone extending this or hitting something similar Transport: TCP port 6668, protocol version 3.3, AES-128-ECB encrypted payloads, CRC32 frame checksums. Crypto is hand-implemented in pure Lua (
lockbox) since the Edge Driver sandbox has no native crypto.
Yep, it’s complicated…