Specifications

SIM900 AT Commands Set
SIM900_ATC_V1.01 95 23.06.2010
+CCWV will be sent, if enabled by this command. The
warning is issued approximately when 5 seconds call time
remains. It is also issued when starting a call if less than 5 s
call time remains.
Parameters
Reference
GSM 07.07 [13]
Note
GSM 07.07 specifies 30 seconds, so SIMCOM deviates from the
specification.
3.2.56 AT+CBC Battery Charge
AT+CBC Battery Charge
Response
+CBC: (list of supported < bcs >s),(list of supported < bcl >s),(voltage)
OK
Test Command
AT+CBC=?
Parameters
see Execution Command
Response
+CBC: < bcs >, < bcl >,<voltage>
OK
+CME ERROR: <err>
Execution
Command
AT+CBC
Parameters
<bcs> charge status
0 ME is not charging
1 ME is charging
2 Charging has finished
<bcl> battery connection level
1...100 battery has 1-100 percent of capacity remaining
vent
<voltage> battery voltage(mV)
Reference
GSM 07.07 [13]
Note
This command depends on hardware and only be used when battery is
charging.
3.2.57 AT+CUSD Unstructured Supplementary Service Data
AT+CUSD Unstructured Supplementary Service Data
Test Command Response