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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))
CLI/SSH username: root
CLI/SSH username: root
CLI/SSH password: <your router’s password>
CLI/SSH password: <your router’s password>
---
----
* Connect to mobile module of the router:
* Connect to mobile module of the router:
...
...
+CREG: 1,"008B","012CD17",7
+CREG: 1,"008B","012CD17",7
...
...
---
----
* 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.
...
...
ATE1
ATE1
OK
OK
...
----
* Use commands '''AT+QCSQ=0''' and '''AT+CREG=0''' to stop showing unnecessary output:
...
at+qcsq=0
at+qcsq=0
OK
OK
OK
OK
...
...
---
----
* Check communication (wait for the module to respond '''OK'''):
* Check communication (wait for the module to respond '''OK'''):
...
...
OK
OK
...
...
---
----
==Debugging process==
==Debugging process==
* If PIN is required, initialize modem with your PIN code:
* If PIN is required, initialize modem with your PIN code:
AT+CPIN="xxxx"
AT+CPIN="xxxx"
...
...
---
----
* Use command '''AT+CPIN''' to query SIM card status:
* Use command '''AT+CPIN''' to query SIM card status:
...
...
+CPIN: READY
+CPIN: READY
...
...
'''Note:''' reboot the module if it fails to identify SIM
'''Note:''' Reboot the module if it fails to identify SIM
----
---
*Use command '''AT+CREG''' to check GSM connection:
* Use command '''AT+CREG''' to check GSM connection:
...
...
AT+CREG?
AT+CREG?
OK
OK
...
...
'''Note:''' OK means that the module has registered on CS domain service
'''Note:''' OK means that the module has registered on CS domain service
---
----
* Use command '''AT+CGREG''' to check PS Service:
* Use command '''AT+CGREG''' to check PS Service:
...
...
OK
OK
...
...
'''Note:''' OK means that the module has registered in UMTS/LTE network
----
* 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).
'''Note:''' OK means that the module has registered in UMTS/LTE network
Example: '''AT+QICSGP=1,1,"APN_Name","","",1'''
---
...
* Configure APN, user name, password and auth type by AT+QICSGP
AT+QICSGP=1,1"bangapro","","",1
OK
...
----
* Use command '''AT+QIACT=<contextID>''' to activate a PDP context:
...
AT+QIACT=1
OK
...
----
* Use command '''AT+QIACT?''' to query IP Address of the PDP context:
...
AT+QIACT?
+QIACT: 1,1,1,"88.77.66.55"
OK
...
'''Note:''' try and activate a PDP context a few times. If failed, then reboot the module.
----
* Use command '''AT+QIOPEN''' to open connection:
...
AT+QIOPEN
OK
...
'''Note:''' if failed – deactivate PDP context - use command '''AT+QIDEACT=<context ID>''' to deactivate PDP context.
----
* Use command '''AT+QPING''' to ping a Remote Server:
...
...
AT+QICSGP=<contextID>[,<context_type>,<APN>[,<username>,<password>)[,<authentication>]]]
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
...
...
''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 fo the provided configuration:
==Example for the provided configuration==
...
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
...
...
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
...
...
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
...
