OK
AT+IPR=?
+IPR:
(1-8,10-13,2400,4800,9600,14400,19200,28800,33600,38400,57600,115200,230400,460800)
OK
This command configures the flow control. The RTS (Request To Send) is an input line. The RTS signal is
received from the terminal and a low condition indicates that the Module can send more data. The CTS
(Clear To Send) is an output line. The CTS signal is sent to the terminal and a low state indicates that
more data can be sent to the Module.
The RTS and CTS together make up what is called RTS/CTS or āhardwareā flow control. Both lines are
used when āhardware flow controlā is enabled in both the terminal and the Module devices. When the
terminal is ready and able to receive data, it puts the RTS line in an active (low) condition to indicate this
to the Module. If the terminal is not able to receive data (typically because its receive buffer is almost full),
it puts the RTS line in an inactive (high) condition as a signal to the Module to stop sending data. When
the terminal is ready to receive more data (for example, after data has been removed from its receive
buffer), it places this line back in the active condition.
The RTS line complements the CTS line. The Module puts the CTS line in an active condition to tell the
terminal that it is ready to receive the data. Likewise, if the Module is unable to receive data, it places the
CTS line in an inactive condition.
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