PioneerPOS G24-LC 用户手册

This command is responsible for setting and saving the request baud rate. This numeric 
extended-format parameter specifies the data rate at which the G24-L accepts commands. 
Specifying a value of 9 disables the function and allows operation only at rates automatically 
detectable by the G24-L. The specified rate takes effect following the issuing of any result 
code(s) associated with the current command line.

The <rate> value specified is the rate in bits per second at which the terminal-G24-L interface 
operates, for example, 19200 or 115200. The rates supported by the G24-L are 
manufacturer-specific. However, the +IPR parameter permits setting any rate supported by the 
G24-L during online operation.

The UART is configured to rates of 300, 600, 1200, 4800, 9600, 19200, 38400, 57600, 115200, 
230400, 460800 bits per second according to the parameters of the +IPR command.

Using AT+IPR=<rate> with a <rate> value other than 9 and 0 disables the auto baud rate 
detection feature. The entered baud rate is stored in the G24-L and is restored after power up.

+IPR is similar to +CBAUD, but with the ability to save.