Specifications

SIM900 AT Command Manual
SIM900_AT Command Manual_V1.03 137 12/24/2010
ERROR =<n>
Parameter
<n> 0 disable slow clock, module will not enter sleep mode.
1 enable slow clock, it is controlled by DTR. When DTR is
high, module can enter sleep mode. When DTR changes to
low level, module can quit sleep mode.
2 The module decides by itself when it enters sleep mode.
When there is no data on serial port, module can enter sleep
mode. Otherwise, it will quit sleep mode.
Reference Note
6.2.24 AT+CENG Switch On or Off Engineering Mode
AT+CENG Switch On or Off Engineering Mode
Response
TA returns the list of supported modes.
+CENG: (list of supported <mode>s),(list of supported <Ncell>s)
OK
Test Command
AT+CENG=?
Parameters
See Write Command
Read Command
AT+CENG?
Response
Engineering Mode is designed to allow a field engineer to view and test the
network information received by a handset, when the handset is either in
idle mode or dedicated mode (that is: with a call active). In each mode, the
engineer is able to view network interaction for the "serving cell" (the cell
the handset is currently registered with) or for the neighboring cells.
TA returns the current engineering mode. The network information
including serving cell and neighboring cells are returned only when
<mode>=1 or <mode> = 2. <cell> carry with them corresponding network
interaction.
+CENG: <mode>,<Ncell>
[+CENG:
<cell>,"<arfcn>,<rxl>,<rxq>,<mcc>,<mnc>,<bsic>,<cellid>,<rla>,<txp
>,<lac>,<TA>"
<CR><LF>+CENG:
<cell>,"<arfcn>,<rxl>,<bsic>,[<cellid>,]<mcc>,<mnc>,<lac>"…]