Data Sheet

SIM900 AT Commands Set
SIM900R01_ATC_V1.00 138 15.01.2010
and the aux channel.
z For this command, please refer to actual model.
6.2.22 AT+CSCLK Configure Slow Clock
AT+ CSCLK Configure Slow Clock
Response
+CSCLK: <n>
OK
Read Command
AT+CSCLK?
Parameter
See Write Command.
Response
+CSCLK: (0,1,2)
OK
Test 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–The module decides by itself when it enters sleep mode.
When there is no data on serial port, module can enter
sleep mode. Otherwise, it will quit sleep mode.
Reference Note
6.2.23 AT+CENG Switch On Or Off Engineering Mode
AT+ CENG Switch On Or Off Engineering Mode