Data Sheet

Smart Machine Smart Decision
OK
Parameters
See Write Command
Response
+ECHO: (<mic0>,<nlp0>, <aec0>,<nr0>, <ns0>),(<micn>,<nlpn>,
<aecn>,<nrn>, <nsn>)
OK
Read Command
AT+ECHO?
Parameters
See Write Command
Response
OK
If error is related to ME functionality:
+CME ERROR: <err>
Write Command
AT+ECHO=<mi
c>,<nlp>,<aec>,<
nr>,<ns>[,<state
>]
Parameters
< mic > audio channel
0 main audio handset channel
1 main audio handfree channel
<nlp> nonlinear processing remove residual echo and background
noise
<aec> acoustic echo cancellation
<nr> noise reduction
<ns> noise suppression
< state> enable or disable to close echo algorithm
0 echo algorithm be closed
1 echo algorithm be actived
Parameter Saving AUTO_SAVE
Mode
Max Response -
Time
Reference Note
For this command, please refer to actual model.
The default state the echo echo algorithm be actived, and the read command
is not displayed.
6.2.43 AT+CAAS Control Auto Audio Switch
AT+CAAS Control Auto Audio Switch
Response
+CAAS: (0-2)
OK
Test Command
AT+CAAS=?
Parameter
SIM800 Series_AT Command Manual_V1.05 175 2014-07-31