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5.
Security Commands
The AT Commands described in this chapter allow the external application to determine various security related
settings.
5.1
AT+CPIN PIN Authentication
controls network authentication of the MC55.
AT+CPIN
The read command returns an alphanumeric string indicating whether or not network authentication is required.
The write command allows the MC55 to store the entered password. This may be for example the SIM PIN1 to
register to the GSM network, or the SIM PUK1 to replace a disabled SIM PIN1 with a new one, or the PH-SIM
PIN if the client has taken precautions for preventing damage in the event of loss or theft etc.
If no PIN1 request is pending (for example if PIN1 authentication has been done and the same PIN1 is entered
again) MC55 responds "+CME ERROR: operation not allowed"; no further action is required.
Each time a password is entered with
reading varies with the SIM card. This may cause a delay of several seconds before all commands which need
access to SIM data are effective. See Section 20.1,
for further detail.
Syntax
Test Command
AT+CPIN=?
Response(s)
OK
Read Command
AT+CPIN?
Response(s)
+CPIN:
<code>
OK
ERROR
+CME ERROR:
<err>
Write Command
AT+CPIN=<pin>[,
<new
Response(s)
OK
ERROR
+CME ERROR:
<err>
Reference(s)
GSM 07.07
MC55_ATC_V04.00
Confidential / Released
the module starts reading data from the SIM. The duration of
AT+CPIN
pin>]
Page 99 of 475
Restricted access to SIM data after SIM PIN authentication
PIN
ASC0 ASC1
MUX1
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MUX2
MUX3 Charge
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3/17/06
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