Specifications

Smart Machine Smart Decision
SIM900_AT Commands Manual_V1.07 142 2012.12.10
Response
+CHFA: <n>
OK
Read Command
AT+CHFA?
Parameter
See Write Command
Response
OK
If error is related to ME functionality:
+CME ERROR: <err>
Write Command
AT+CHFA=<n>
Parameter
<n> 0 Main audio handset channel
1 Aux audio headset channel
2 Main audio handfree channel
3 Aux audio handfree channel
Reference Note
z This Command swaps the audio channels among different channels.
z This command is related to the actual module.
6.2.23 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.