Specifications

Smart Machine Smart Decision
SIM900_AT Commands Manual_V1.07 43 2012.12.10
Reference
V.25ter
Note
2.2.41 AT+IPR Set TE-TA Fixed Local Rate
AT+IPR Set TE-TA Fixed Local Rate
Response
+IPR: (list of supported auto detectable <rate>s),(list of supported
fixed-only <rate>s)
OK
Test Command
AT+IPR=?
Parameter
See Write Command
Response
+IPR: <rate>
OK
Read Command
AT+IPR?
Parameter
See Write Command
Response
This parameter setting determines the data rate of the TA on the serial
interface. The rate of Command takes effect following the issuance of any
result code associated with the current Command line.
OK
Write Command
AT+IPR=<rate>
Parameter
<rate> Baud rate per second
0 (Auto-bauding)
1200
2400
4800
9600
19200
38400
57600
115200
Reference
V.25ter
Note
Factory setting is AT+IPR=0（auto-bauding）.
2.2.41.1 Auto-bauding
Synchronization between DTE and DCE ensure that DTE and DCE are correctly synchronized and
the baud rate used by the DTE is detected by the DCE (=ME). To allow the baud rate to be
synchronized, simply issue an "AT" string. This is necessary when you start up the module while