Chapter 3: AT Commands Reference
April 15, 2008 G24-L AT Commands Reference Manual 3-3
+CGMR, +GMR, +FMR, Request Revision
These commands request the revision identification. The G24-L outputs a string containing the
revision identification information of the software version contained within the device.
Example
AT+CGMR
+CGMR: "G24-L SW 4-0.210-000"
AT+GMR
+GMR: "G24-L SW 4-0.210-000"
AT+FMR
+FMR: "G24-L SW 4-0.210-000"
+CGSN, +GSN, Request Product Serial Number Identification
This command displays the product serial number identification IMEI (International Mobile
Equipment Identification). It can be used even when the SIM card is not inserted.
The following table shows the +CGSN, +GSN parameters.
Command Response/Action
AT+CGMR +CGMR: <revision>
AT+GMR +GMR: <revision>
AT+FMR +FMR: <revision>
Command Response/Action
AT+CGSN
AT+CGSN?
+CGSN: <sn>
+GSN
+GSN?
+GSN: <sn>
Table 3-1: +CGSN, +GSN Parameters
<Parameter> Description
<sn> The IMEI (International Mobile Station Equipment Identity) number is comprised of
15 digits, as specified by GSM 03.03 [3]. IMEI numbers are composed of the
following elements, all in decimal digits:
Type Approval Code (TAC) - 6 digits
Serial Number (SNR) - 6 digits
Spare digit - 1 digit
The TAC and SNR are protected against unauthorized changes.
