Specifications

AT Command Set
TC3X_ATC_01_V04.00 Page 70 of 204 29.05.2002
Reference
GSM 07.07
Note
· To check that ME has entered the SLEEP mode, it is recommended to
measure the supply current. Depending on the configuration of the SYNC
pin, the SLEEP mode may also be indicated by a status LED (see
„AT^SSYNC Configure SYNC Pin“, pg. 177).
· When in SLEEP mode, the following events may cause the ME to wake up:
incoming call, Real Time Clock alarm, falling edge of RTS (RS-232, 2.65V
CMOS level) and receipt of an unsolicited result code (URC, see chapter
7.1.3).
· In multiplex mode, the CFUN profile is shared by all multiplexer channels.
When you change the CFUN state on one logical channel, all other logical
channels adopt the same state.
Example 1
To check the level of functionality use the read command:
AT+CFUN?
+CFUN: 1 Default mode after ME was restarted.
Remember that the AT interface is not accessible in SLEEP mode.
Consequently, the read command is only useful when the ME is set to full
functionality.
Example 2
To set the ME to SLEEP mode enter
AT+CFUN=0
OK
When, for example, an SMS is being received and indicated by an unsolicited
result code (URC), the ME wakes up to full operation.
+CMTI: "SM",5 Note that the URC used in this example will appear
only if CMTI=1,1 was configured before. See Chapters
5.10 and 7.1.3.
After this, you may want to verify the operating status:
AT+CFUN?
+CFUN: 1 Indicates that ME has entered full functionality mode.
Example 3
To reset and restart the ME:
AT+CFUN=1,1 or alternatively, AT+CFUN=0,1
OK
^SYSSTART Note that ^SYSSTART appears only if AT+IPR¹0. If the
ME is in autobaud mode, it is recommended to wait 3 to
5 seconds before entering the first AT command.
After the GSM engine was reset and restarted you are required to enter PIN 1:
AT+CPIN
+CPIN: SIM PIN
OK