Data Sheet

SIM900 AT Commands Set
SIM900R01_ATC_V1.00 126 15.01.2010
Response :
OK
ERROR
Write Command
AT+CMIC=
<channel>,<
gainlevel>
Parameters
<channel> 0 – Main Microphone
1 – Aux Microphone
<gainlevel> int: 0 – 15
0 0dB
1 +1.5dB
2 +3.0 dB
3 +4.5 dB
4 +6.0 dB
5 +7.5 dB
6 +9.0 dB
7 +10.5 dB
8 +12.0 dB
9 +13.5 dB
10 +15.0 dB
11 +16.5 dB
12 +18.0 dB
13 +19.5 dB
14 +21.0 dB
15 +22.5 dB
Reference Note
Please refer to actual model for channel number.
6.2.5 AT+CALA Set Alarm Time
AT+CALA Set Alarm Time
Response :
+CALA: (<time>,<n1>,[<recurr>]
(<CR><LF>+CALA: <time>,<n2>,[<recurr>]
(…)))
OK
+CME ERROR: <err>
Read
Command
AT+CALA?
Parameters
See Write Command