Data Sheet

Smart Machine Smart Decision
Test Command Response
AT+CHFA=? +CHFA: (0=NORMAL_AUDIO, 1=AUX_AUDIO,
2=HANDFREE_AUDIO, 3=AUX_HANDFREE_AUDIO,
4=PCM_AUDIO)
OK
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 channel
1 Aux audio channel
2 Main audio channel hand free mode
3 Aux audio channel hand free mode
4 PCM channel
Parameter Saving NO_SAVE
Mode
Max Response -
Time
Reference Note
z This Command swaps the audio channels among different channels.
z Scope of parameter <channel> is different among SIM800 series
projects, please refer to chapter 21 for details.
z Main audio channel hand free mode is the same with main audio
channel; aux audio channel hand free mode is the same with aux audio
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
SIM800 Series_AT Command Manual_V1.05 158 2014-07-31