Manual
     Smart Machine Smart Decision 
SIM800 Series_AT Command Manual_V1.09  352  2015-08-03 
call: the call is alerted.  AT+MORING=1 
MO CONNECTED 
Shows call state of mobile originated 
call: the call is established. 
AT+MORING=1 
+CPIN: <code> 
Indicates whether some password is 
required or not. 
+CPIN: NOT READY  SIM Card is not ready. 
+CPIN: NOT INSERTED  SIM Card is not inserted. 
AT+CPIN 
+CSQN: <rssi>,<ber> 
Displays signal strength and channel bit 
error rate 
when <rssi>,<ber>values change. 
AT+EXUNSOL="
SQ",1 
+SIMTONE: 0 
The generated tone playing is stopped or 
completed. 
AT+SIMTONE 
+STTONE: 0 
The SIM Toolkit tone playing is stopped 
or completed. 
AT+STTONE 
+CR: <serv> 
An intermediate result code is 
transmitted during connect negotiation 
when the TA has determined the speed 
and quality of service to be used, before 
any error control or data compression 
reports are transmitted, and before any 
final result code (e.g. CONNECT) 
appears. 
AT+CR=1 
+CUSD: 
<n>[,<str_urc>[,<dcs>]] 
Indicates an USSD response from the 
network, or network initiated operation. 
AT+CUSD=1 
RING 
An incoming call signal from network is 
detected. 
NORMAL POWER DOWN 
SIM800 is powered down by the 
PWRKEY pin or AT command 
“AT+CPOWD=1”. 
+CMTE: <n>  The module temperature is abnormal. 
Refer to hardware document for details. 
AT+CMTE= 1 
UNDER-VOLTAGE 
POWER DOWN 
Under-voltage automatic power down. 
UNDER-VOLTAGE 
WARNNING 
under-voltage warning 
OVER-VOLTAGE POWER 
DOWN 
Over-voltage automatic power down. 
OVER-VOLTAGE 
WARNNING 
over-voltage warning 
CHARGE-ONLY MODE 
The module is charging by charger. 
(require hardware support) 
RDY 
Power on procedure is completed, and 
the module is ready to operate at fixed 
baud rate. (This URC does not appear 
when auto-bauding function is active). 
AT+IPR=<rate> 
<rate> is not 0 
Call Ready 
Module is powered on and phonebook 
initialization procedure is over. 
AT+CIURC=1 
SMS Ready 
Module is powered on and SMS   










