25.3. Format of the
Information Response of the +CMGS AT Command in SMS Text Mode
If
the GSM/GPRS modem or mobile phone sends the SMS message
successfully, it will return an information response to the computer
/ PC. In SMS text mode, the information response of the +CMGS AT
command has the following format: (Optional fields are enclosed in
square brackets.)
+CMGS:
message_reference[,service_center_time_stamp]
Here
is an example that gives you some idea of how an actual information
response should look like:
+CMGS:
5,"07/02/05,08:30:45+32"
The
message_reference Field
The
first field of the information response of the +CMGS AT command,
message_reference, contains an integer in the range
from 0 to 255. It is a reference number allocated by the GSM/GPRS
modem or mobile phone to the SMS message sent.
The
service_center_time_stamp Field
The
second field of the information response of the +CMGS AT command,
service_center_time_stamp,
contains a string that tells the time and date at which the
SMS message arrived at the service center (i.e. SMSC). The time stamp
format is "yy/MM/dd,hh:mm:ss±zz".
(yy = year, MM = month, dd = day, hh = hour, mm = minute, ss =
second, zz = time zone. Note: the unit of time zone is a quarter of
an hour.)
For
example, "07/02/05,08:30:45+32" represents 5 February 2007,
8:30:45 GMT+8 hours. "+32" means GMT+8 hours, since 32
quarters of an hour = 8 hours.
Note
that service_center_time_stamp is an optional field. A
GSM/GPRS modem or mobile phone includes this field in the information
response only if the messaging service value set by the AT command
+CSMS (command name in text: Select Message Service) is 1 and the
mobile network supports the use of this messaging service value. By
default the messaging service value is 0. Usually this is the value
to be used and the service_center_time_stamp
field is not shown.
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