User Manual

GM862-GPS Software User Guide
1vv0300729 Rev. 5 - 05/07/07
Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved page 14 of 120
2.5.2 SIM presence checking
After autobauding the first thing to check is the SIM presence and PIN code insertion, this can be done
with the following commands:
2.5.2.1 Enable the Extended error result codes
• send command AT+CMEE=1<cr>
• wait for OK response
or if you prefer the verbose format instead of the numerical format then:
• send command AT+CMEE=2<cr>
• wait for OK response
2.5.2.2 Query SIM presence and status
• send command AT+CPIN?<cr>
• wait for response:
Response Reason Action
+CPIN: SIM PIN SIM is present and PIN is
required to continue operations
Proceed to par. 2.5.2.3
+CPIN: SIM PUK SIM is present and 3 attempts
to give SIM PIN have failed, so
SIM PUK is required
Send command
AT+CPIN=<SIM PUK>
+CPIN: READY SIM is present and no PIN code
is required to proceed
Proceed ahead
+CME ERROR: 10 SIM not present Insert SIM or require SIM
insertion and repeat from par.
2.5.2.2
+CME ERROR: 13 SIM defect Check SIM insertion or require
a new SIM not defected and
repeat from par. 2.5.2.2
+CME ERROR: 14 SIM is busy retry later
+CME ERROR: 15 SIM is wrong type Check SIM, it must be a GSM
SIM.