Specifications

MC35i AT Command Set
4.7 AT+IPR
s
m obil e
MC35i_ATC_V01.03 Page 89 of 444 5/7/04
Confidential / Released
Parameter Description
bit rate per second (bps)
0
(D)
Activates autobauding. See Section 4.7.1, Autobauding for further details.
300
600
1200
2400
4800
9600
14400
19200
28800
38400
57600
115200
230400 (Not available if product is MC35i Terminal)
Notes
• Factory default is autobauding enabled (AT+IPR=0). It will not be restored with AT&F.
• 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.
• Generally,
AT+IPR should be used as a standalone command. If nethertheless combinations with other com-
mands on the same command line cannot be avoided, there are several constraints to be considered:
- Avoid combinations with the AT commands listed in Section 1.4.2, Combining AT commands on the same
command line.
- Take into account, that a delay of 100ms is required between the response to the last command (e.g. OK)
and the next command on the same line.
- When you enter
AT+IPR=0, autobauding will be activated after the response to the last command is
received.
- When local echo is active (
ATE1) and you enter AT+IPR=x with other commands you may encounter the
following problem: if switching to the new bit rate takes effect while a response is being transmitted, the
last bytes may be sent with the new bit rate and thus, not properly transmitted. The following commands
will be correctly sent at the new bit rate.
• In order to account for greater amounts of data it is recommended to choose a minimum bit rate of 2400 bps.
If the ME is operated in Multiplex mode we suggest a minimum bit rate of 4800bps.
• A selected bit rate takes effect after the write commands returns OK (except for Multiplex mode).
• In Multiplex mode, the write command
AT+IPR=<rate> will not change the bit rate currently used, but the
new bit rate will be stored and becomes active, when the module is restarted.
<rate>
(num)(&V)