Answer

The baud rate directive is not open to customers，

Currently, only 9600/19200/38400 are supported; 

The changes are as follows：

Baud rates 9600：A5 FF 56 00 00 00 00 FA

Baud rates 19200：A5 FF 56 01 00 00 00 FB

Baud rates 38400：A5 FF 56 02 00 00 00 FC

Save：A5 FF 74 00 00 00 00 18