BGS2T AT Command Set
4.7 AT+IPR
BGS2T_ATC_V01.301 Page 101 of 554 1/31/12
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4.7 AT+IPR Bit Rate
AT+IPR allows to query and set the bit rate of the BGS2T's asynchronous serial interfaces (UART).
The test command returns the values of supported automatically detectable bit rates and the values of the sup-
ported fixed bit rates.
The read command returns the current bit rate of the interface.
The write command specifies the bit rate to be used for the interface. Delivery bit rate value (<rate>) is Auto-
baud mode enabled (AT+IPR=0). This setting will not be restored with AT&F.
If using a fixed bit rate, make sure that both BGS2T and TE are configured to the same rate. A selected bit rate
takes effect after the write command returns OK and is stored in non-volatile memory. It is not recommended to
set bit rates lower than 9600 bps in order to avoid timing problems (see Section 1.5, Communication between
Customer Application and BGS2T for details about timing).
In case of Autobaud mode (AT+IPR=0) the detected TE bit rate will not be saved and, therefore, needs to be
resynchronized after any restart of the ME (for details refer Section 4.7.1, Autobauding). If Autobaud mode is
activated, the ME will automatically recognize bit rate, character framing and parity format (refer AT+ICF) cur-
rently used by the TE.
In Multiplex mode the write command will not change the bit rate currently used, but the new bit rate will be stored
and becomes active, when the ME is restarted.
The current setting of AT+IPR will be preserved when you download firmware (i.e. a firmware update does not
restore the factory setting) or in the event of power failure.
Syntax
Parameter Description
bit rate per second (bps)
0 Activates Autobaud mode. See Section 4.7.1, Autobauding for further details.
300
600
1200
Test Command
AT+IPR=?
Response(s)
+IPR: (list of supported auto-detectable <rate>s) , (list of supported fixed-only <rate>s)
OK
Read Command
AT+IPR?
Response(s)
+IPR: <rate>
OK
Write Command
AT+IPR=<rate>
Response(s)
OK
ERROR
+CME ERROR: <err>
PIN ASC0 MUX1 MUX2 MUX3 Last Reference(s)
- + ± ± ± - - V.250
<rate>
(num)(&V)
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