Specifications

SIM900 AT Commands Set
SIM900_ATC_V1.01 139 23.06.2010
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 neighbouring cells.
TA returns the current engineering mode. The network information
including serving cell and neighbouring 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>,<
lac >,< rla >,< txp >,< TA>”
<CR><LF>+CENG: <cell>,”<arfcn>,<rxl>,<bsic>,<Lac>”
…]
OK
Read Command
AT+CENG?
Parameters
See Write Command.
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.
Response
TA attempt to switch on or off engineering mode.GSM network operator.
TA controls the presentation of an unsolicited result code +CENG: (network
information) when <mode>=2 and there is a change of network
information .
OK
ERROR
Write Command
AT+CENG
=<mode>[,<Ncell
>]
Parameters
<mode> 0 switch off engineering mode
1 switch on engineering mode
2 switch on engineering mode, and activate the
unsolicited reporting of network information.
<Ncell> 0 un-display neighbor cell ID