LTE Module Series
EC25&EC21 AT Commands Manual
EC25&EC21_AT_Commands_Manual 35 / 231
1. If a fixed baud rate is set, make sure that both TE (DTE, usually external processor) and TA (DCE,
Quectel module) are configured to the same rate.
2. The value of
AT+IPR
cannot be restored with
AT&F
and
ATZ
; but it is still storable with
AT&W
.
3. In multiplex mode, the baud rate cannot be changed by the Write Command
AT+IPR=<rate>
; and
the setting is invalid and cannot be stored even if
AT&W
is executed after the Write Command.
4. A selected baud rate takes effect after the Write Commands are executed and acknowledged by
OK
.
Example
AT+IPR=115200
//Set fixed baud rate to 115200bps
OK
AT&W
//Store current setting, that is, the serial communication
speed is 115200bps after restarting module
OK
AT+IPR?
+IPR: 115200
OK
AT+IPR=115200;&W
//Set fixed baud rate to 115200bps and store current setting
OK
3.6. AT+QRIR Restore RI Behavior to Inactive
If the RI (ring indicator) behavior is "always", it can be restored to inactive by the Execution Command.
The RI behavior is controlled by
AT+QCFG
. Please refer to
AT+QCFG="urc/ri/ring"
,
AT+QCFG="urc/ri/smsincoming"
and
AT+QCFG="urc/ri/other"
for more details.
115200
230400
460800
921600
2900000
3000000
AT+QRIR
Restore RI Behavior to Inactive
Test Command
AT+QRIR=?
Response
OK
Execution Command
AT+QRIR
Response
OK
NOTES