User's Manual

Page 23 of 31
4. Application Illustration
4.1 Dial-up procedure
The type “S” means the AT Command sent to U6300, and the type “R” means Respond from U6300.
SN. T ype AT Command/Respond Explain
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S AT+CPIN? SIM card querying
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R READY
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S AT+CPNNUM PIN And PUK querying
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R PIN1=3; PUK1=10; PIN2=0; PUK2=8
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S AT+NWLCK? SIM LOCK querying
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R +NWLCK: NETWORK UNLOCKED
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S AT+CIMI Get IMSI
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R 460020177608847 IMSI, by which APN is selected
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S AT+CGDCONT=1,"IP","CMNET" Set APN
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R OK
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S ATDT*99***1# Dial-up
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PPP protocol
4.2 SMS
4.2.1 Message Format
U6300 supports two kinds of message format, PDU and TEXT which can be set by AT command AT+CMGF,
AT+CMGF=0 means PDU format, and AT+CMGF=1 means TEXT format.
4.2.2 Set Message Storage Location
The command AT+CPMS=<mem1>,<mem2>,<mem3> is used to set message storage location.
<mem1>, <mem2>, <mem3> can be set as SM and ME, SM means SIM card，ME means the U6300 module.
<mem1>: The parameter set here means memory storage used as read and delete message function. It can be operated