SIM8200G-EVB_User Guidelines_V1.01
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If you need to modify the data frame format, please refer to the instruction AT + ICF. Common data
frame format settings are as follows
：
Table 9: UART common data frame format settings
UART format
Setting instructions
8 Data bit 1 Stop bit No parity
AT+ICF
、
AT+ICF=2
、
AT+ICF=2,2
8 Data bit 1 Stop bit odd check
AT+ICF=1,0
8 Data bit 1 Stop bit even check
AT+ICF=1,1
7 Data bit 1 Stop bit No parity
AT+ICF=4
、
AT+ICF=4,2
7 Data bit 1 Stop bit No parity
AT+ICF=3,0
7 Data bit 1 Stop bit even check
AT+ICF=3,1
2) Set the serial port baud rate
SIM8200G supports a variety of common baud rates. The standard factory default baud rate is 115200,
and it supports automatic baud rate adaptation. There are two methods to modify the baud rate. For
temporary modification and long-term modification, please refer to the instruction AT + IPR for
temporary modification. Please refer to AT + IPREX for long-term modification of the baud rate. The
serial port baud rate is modified for a long time, and the baud rate will be saved locally, so it will continue
to take effect after the next boot. The temporary modification of the serial port baud rate will be
invalidated after restart. The baud rate will be restored to the locally saved baud rate.
Table 10: UART baud rate support
UART baud rate support
Supported rate
Serial communication baud rate 300,600,1200,2400,4800,9600,19200,38400,57600,115200,
230400,460800,921600
Serial port adaptive baud rate
9600,19200,38400,57600,115200
2) Common baud rate instructions for serial ports
：
Table 11: UART common baud rate operations
UART common baud rate
operations
Related instructions
Query the current boot baud rate
AT+IPREX?
Query the current baud rate
AT+IPR?
Query module supports baud rate
AT+IPR=?
、
AT+IPREX=?
Set the boot default baud rate to 9600
AT+IPREX=9600
Set temporary baud rate to 9600
AT+IPR=9600
Set auto baud rate matching
AT+IPREX=0
Set temporary baud rate to match
automatically
AT+IPR=0
3) Set serial data flow control The serial port of SIM8200G adopts RTS / CTS flow control mode, but the
