Data Sheet

Smart Machine Smart Decision
SIM800 Series_AT Command Manual_V1.09 160 2015-08-03
channel. Channel 2, 3 is virtual channel.
6.2.20 AT+CSCLK Configure Slow Clock
AT+CSCLK Configure Slow Clock
Response
+CSCLK: (list of supported <n>s)
OK
Test Command
AT+CSCLK=?
Parameter
See Write Command
Response
+CSCLK: <n>
OK
Read Command
AT+CSCLK?
Parameter
See Write Command
Response
OK
ERROR
Write Command
AT+CSCLK=<n
>
Parameter
<n> 0 Disable slow clock, module will not enter sleep mode.
1 Enable slow clock, it is controlled by DTR. When DTR is
high, module can enter sleep mode. When DTR changes to low
level, module can quit sleep mode.
2 Enable slow clock automatically. When there is no interrupt
(on air and hardware such as GPIO interrupt or data in serial
port), module can enter sleep mode. Otherwise, it will quit sleep
mode.
Parameter Saving
Mode
AT&W_SAVE
Max Response
Time
-
Reference Note
 There are two caveats when you want to quit sleep mode in mode 2:
1, You should input some characters (at least one) to awake module
2, An interval time of 100ms more is necessary between waking characters
and following AT commands,otherwise the waking characters will not be
discarded completely,and messy codes will be produced which may leads to
UART baudrate re-adaptation.
 The +CSCLK value can not be reset by AT&F or ATZ command.