M10 AT Commands Set
M10_ATC_V1.01
- 35 -
300
600
1200
2400
4800
9600
14400
19200
28800
38400
57600
115200
Reference
V.25ter
Note
Factory setting is AT+IPR=0
（
autobauding
）
.It can be restored with AT&F
and ATZ when you modified the bit rate’s value.
2.2.43.1 Autobauding
Synchronization between DTE and DCE ensure that DTE and DCE are correctly synchronized and
the bit rate used by the DTE is detected by the DCE (= ME). To allow the bit rate to be
synchronized simply issue an "AT" or "at" string. This is necessary when you start up the module
while autobauding is enabled. It is recommended to wait 3 to 5 seconds before sending the first
AT character. Otherwise undefined characters might be returned.
If you want to use autobauding and auto-answer at the same time, you can easily enable the
DTE-DCE synchronization, when you activate autobauding first and then configure the
auto-answer mode.
Restrictions on autobauding operation
z
The serial interface has to be operated at 8 data bits, no parity and 1 stop bit (factory
setting).
z
Only the strings .AT. or .at. can be detected.
z
Unsolicited Result Codes that may be issued before the ME detects the new bit rate (by
receiving the first AT Command string) will be sent at the previously detected bit rate.
z
The Unsolicited Result Codes “RDY” and so on are not indicated when you start up the
ME while autobauding is enabled.
z
It is not recommended to switch to autobauding from a bit rate that cannot be detected by
the autobauding mechanism (e.g. 300 baud). Responses to +IPR=0 and any commands on
the same line might be corrupted.
z
See also Chapter 2.2.44.
Autobauding and bit rate after restart
The most recently detected bit rate cannot be stored when module is powered down (Store bit rate
determined with AT&W). Therefore, module will detect bit rate again after restart.
Quectel
