Data Sheet

Smart Machine Smart Decision
SIM800 Series_AT Command Manual_V1.09 159 2015-08-03
Parameter Saving
Mode
AT&W_SAVE
Max Response
Time
-
Reference Note
This command is related to the actual module, <state> don’t support power
off save.
6.2.19 AT+CHFA Swap the Audio Channels
AT+CHFA Swap the Audio Channels
Test Command
AT+CHFA=?
Response
+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
Mode
NO_SAVE
Max Response
Time
-
Reference Note
 This Command swaps the audio channels among different channels.
 Scope of parameter <channel> is different among SIM800 series
project, please refer to chapter 21 for details.
 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