MC55i AT Command Set

MC55i AT Command Set
2.8 AT+CFUN
• To check whether power saving is on, you can query the status with the read command AT+CFUN only if
the module is in full functionality mode or in CYCLIC SLEEP mode. If available, you can also take advantage
of the status LED controlled by the SYNC pin (see AT^SSYNC and [2]). The LED remains "off" while the module
is in any of the SLEEP modes. However, the module can wake up temporarily from power saving without
leaving its CYCLIC SLEEP mode (without changing +CFUN ""), e.g. for a network scan after a loss of
radio coverage, or after receipt of serial data during CYCLIC SLEEP mode. During this "temporary wakeup
state" the LED will operate as if the ME was in full functionality mode.
• Recommendation: In NON-CYCLIC SLEEP mode, you can set an RTC alarm to wake up the ME and return
to full functionality. This is a useful approach because, in this mode, the AT interface is not accessible.
Examples
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 NON-CYCLIC SLEEP mode. Consequently, the read
command is only useful when the ME is set to full functionality or, when is set to 5, 6, 7, 8 or 9.
AT+CFUN
+CFUN: 5
CYCLIC SLEEP mode
EXAMPLE 2
To set the ME to NON-CYCLIC 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
AT+CNMI=1,1 was configured before.
After this, you may want to verify the operating status:
AT+CFUN
+CFUN: 1
EXAMPLE 3
To stop CYCLIC SLEEP mode and return to full functionality:
AT+CFUN
+CFUN: 5
OK
AT+CFUN=1
OK
Remember that this approach is not applicable to the NON-CYCLIC SLEEP mode (since the serial interface
is disabled). The NON-CYCLIC SLEEP mode ends with the first wake-up event.
EXAMPLE 4
To reset and restart the ME:
Indicates that ME has entered full functionality mode.
AT+CFUN=1,1 or alternatively, AT+CFUN=0,1 or 5,1 or 6,1 or 7,1 or 8,1 or 9,1
OK
^SYSSTART
The ^SYSSTART URC confirms that the ME has been rebooted. Note
that ^SYSSTART appears only if AT+IPR ≠ 0. If the ME is in autobaud
mode, it is recommended to wait 3 to 5 seconds before entering the first
AT command. Remember to enter the SIM PIN after restart.
MC55i_ATC_V01.201 Page 41 of 482 1/14/09
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