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Mobile data connection troubleshooting (view source)
Revision as of 15:59, 22 May 2020
, 15:59, 22 May 2020Protected "Mobile data connection troubleshooting" ([Edit=Allow only administrators] (indefinite) [Move=Allow only administrators] (indefinite))
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* You probably won't see anything when you type commands, and that’s because the screen echo may be disabled. '''ATE1''' command will enable it so that you can see what you write. '''AT+QCSQ=0''' and '''AT+CREG=0''' command stops showing unnecessary output:
* You probably won't see anything when you type commands, and that’s because the screen echo may be disabled. '''ATE1''' command will enable it so that you can see what you write.
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ATE1
ATE1
OK
OK
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* Use commands '''AT+QCSQ=0''' and '''AT+CREG=0''' to stop showing unnecessary output:
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at+qcsq=0
at+qcsq=0
OK
OK
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==Debugging process==
==Debugging process==
* If PIN is required, initialize modem with your PIN code:
* If PIN is required, initialize modem with your PIN code:
+CPIN: READY
+CPIN: READY
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'''Note:''' reboot the module if it fails to identify SIM
'''Note:''' Reboot the module if it fails to identify SIM
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* Use command '''AT+CREG''' to check GSM connection:
*Use command '''AT+CREG''' to check GSM connection:
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AT+CREG?
AT+CREG?
OK
OK
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'''Note:''' OK means that the module has registered on CS domain service
'''Note:''' OK means that the module has registered on CS domain service
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OK
OK
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'''Note:''' OK means that the module has registered in UMTS/LTE network
'''Note:''' OK means that the module has registered in UMTS/LTE network
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* Configure APN, user name, password and auth type by AT+QICSGP
* Use command '''AT+QICSGP''' to configure APN, user name, password and auth type:
AT+QICSGP=<contextID>[,<context_type>,<APN>[,<username>,<password>)[,<authentication>]]]
''<context type>'' The protocol type (1 – IPV4; 2 – IPv6);
''<context id>'' The range is 1-16;
''<authentication>'' The authentication methods (0 – NONE; 1 – PAP; 2 – CHAP; 3-PAP or CHAP).
Example: '''AT+QICSGP=1,1,"APN_Name","","",1'''
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AT+QICSGP=1,1"bangapro","","",1
OK
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OK
OK
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'''Note:''' try and activate a PDP context a few times. If failed, then reboot the module.
'''Note:''' try and activate a PDP context a few times. If failed, then reboot the module.
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OK
OK
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'''Note:''' if failed – deactivate PDP context - use command '''AT+QIDEACT=<context ID>''' to deactivate PDP context.
'''Note:''' if failed – deactivate PDP context - use command '''AT+QIDEACT=<context ID>''' to deactivate PDP context.
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''1'' –The context ID. The range is 1-16;
''8.8.8.8'' - The host address in string type.
'''Note:''' if ping a remote server successfully, response is '''OK''' (means that the module works properly). If there is any error, response is '''ERROR''' (means the problem is in the module).
==Example for the provided configuration==
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root@Teltonika:~# ifdown ppp
root@Teltonika:~# /etc/init.d/gsmd stop
root@Teltonika:~# microcom /dev/modem_cmd
+QCSQ: "LTE",47,-75,166,-10
+QCSQ: "LTE",47,-75,161,-10
+QCSQ: "LTE",47,-75,156,-10
+CREG: 1,"008B","012CD17",7
AT+QCSQ=0
OK
+CREG: 1,"008B","012CD0D",7
+CREG: 1,"008B","012CD17",7
AT+CREG=0
OK
AT
OK
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AT+CPIN?
+CPIN: READY
OK
AT+CREG
OK
AT+CREG?
+CREG: 0,1
OK
AT+CREG
OK
AT+CGREG?
+CGREG: 0,1
OK
AT+QICSGP=1,1"bangapro","","",1
OK
AT+QIACT=1
OK
AT+QIACT?
+QIACT: 1,1,1,"88.77.66.55"
OK
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AT+QIOPEN
OK
AT+QPING=1,"8.8.8.8"
OK
+QPING: 0,"8.8.8.8",32,54,255
+QPING: 0,"8.8.8.8",32,30,255
+QPING: 0,"8.8.8.8",32,35,255
+QPING: 0,"8.8.8.8",32,34,255
+QPING: 0,4,4,0,30,54,37
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