Data Sheet

Smart Machine Smart Decision
6.2.18 AT+CHF Configure Hands Free Operation
AT+CHF Configure Hands Free Operation
Response
+CHF: (list of supported <ind>s),(list of supported <state>s)
OK
Test Command
AT+CHF=?
Parameters
See Write Command
Response
+CHF: <ind>,<state>
OK
Read Command
AT+CHF?
Parameters
See Write Command
Response
OK
ERROR
If error is related to ME functionality:
+CME ERROR: <err>
Unsolicited Result Code
+CHF: <state>
Write Command
AT+CHF=<ind>
[,<state>]
Parameters
<ind> 0 Unsolicited result code disabled
1 Unsolicited result code enabled
(non-volatile)
<state> 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 AT&W_SAVE
Mode
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
SIM800 Series_AT Command Manual_V1.05 157 2014-07-31