SIM8200G-EVB_User Guidelines_V1.01
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full-featured serial port of SIM8200G works by common serial mode by default. If we need to set the
working mode of serial flow control, please refer to AT + IFC.
Serial flow control configuration instruction setting method
：
Table 12: UART flow control method
UART flow control method
Setting instructions
No flow control, normal mode
AT+IFC
、
AT+IFC=0,0
RTS/CTS Flow control method
AT+IFC=2,2
RTS Flow control method
AT+IFC=2,0
CTS Flow control method
AT+IFC=0,2
The method of using serial port RTS flow control can be verified by using the serial port tool. When RTS
flow control is set, if RTS is not checked, it means that RTS does not take effect. At this time, two
consecutive ATs are sent. It is found that the window of the serial port tool does not show AT and return
value.
Figure 22 serial port tool without AT and return value
Then check RTS to make RTS take effect, and then the window of serial tool will display AT and return
value.
