Wavecom GSM Modem
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3.6. Operator selection +COPS
To select the operator, two possibilities exist :
The mobile enters the manual mode, and then try to find an operator
which is indicated by the application. If it finds and registers correctly, then
the mobile stays in idle mode.
The mobile enters the automatic mode, and then try to find the home
operator. If it finds and registers correctly, then the mobile stays in idle mode ;
if not, the mobile looks itself automatically for another network.
To force an attempt to select and register a GSM network operator, the
application must send the following command :
AT+COPS=<mode>, <format>, <oper>
The first parameter indicates either automatic (value 0) or manual
(value 1). The second parameter indicates the format of the third parameter.
The only format supported by Wavecom module is the numerical format
(value 2). The third parameter is the operator identifier (MCC3 MCC2 MCC1
MNC2 MNC1).
Application to GSM
AT+COPS?
ask for current plmn
GSM to application
+COPS: 0,2,20801
OK
Home plmn is France telecom
Application to GSM
AT+COPS=?
ask for plmn list
GSM to application
+COPS: (2,20801), (0,20810)
OK
Home plmn is France Telecom
SFR network has been seen
Application to GSM
AT+COPS=1,2,20810
ask for registration on SFR network
GSM to application
+CME ERROR: 3
failed
Application to GSM
AT+COPS=1,1,20810
ask for registration on SFR network
GSM to application
+CME ERROR: 4
wrong parameters
Application to GSM
AT+COPS=0,2
ask for registration on home
network
GSM to application
OK
succeeded
3.7. Redial last number ATDL
This command is used by the application to redial the last number used
in the command ATD. The application sends :
