Per 协议简述(3): FFE4 now 19 bytes — adds Byte17 fitting status (0=not fitted, 1=fitted) and Byte18 run state (0=IDLE, 1=scanning, 2=treating, FF=fault). Maintains backward compat with 17-byte format.
Per 协议简述(3): FFE4 now 19 bytes — adds Byte17 fitting status (0=not fitted, 1=fitted) and Byte18 run state (0=IDLE, 1=scanning, 2=treating, FF=fault). Maintains backward compat with 17-byte format.