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Mobile data connection troubleshooting (view source)
Revision as of 22:24, 19 May 2020
, 22:24, 19 May 2020no edit summary
+CREG: 1,"008B","012CD17",7
+CREG: 1,"008B","012CD17",7
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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. '''AT+QCSQ=0''' and '''AT+CREG=0''' command stops showing unnecessary output:
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OK
OK
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* Check communication (wait for the module to respond '''OK'''):
* Check communication (wait for the module to respond '''OK'''):
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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:
AT+CPIN="xxxx"
AT+CPIN="xxxx"
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* Use command '''AT+CPIN''' to query SIM card status:
* Use command '''AT+CPIN''' to query SIM card status:
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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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'''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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* Use command '''AT+CGREG''' to check PS Service:
* Use command '''AT+CGREG''' to check PS Service:
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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
* Configure APN, user name, password and auth type by AT+QICSGP
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<authentication> The authentication methods (0 – NONE; 1 – PAP; 2 – CHAP; 3-PAP or CHAP).
<authentication> The authentication methods (0 – NONE; 1 – PAP; 2 – CHAP; 3-PAP or CHAP).
Example: AT+QICSGP=1,1,"APN_Name","","",1
Example: AT+QICSGP=1,1,"APN_Name","","",1
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* Use command '''AT+QIACT=<contextID>''' to activate a PDP context:
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AT+QIACT=1
OK
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* Use command '''AT+QIACT?''' to query IP Address of the PDP context:
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AT+QIACT?
+QIACT: 1,1,1,"88.77.66.55"
OK
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'''Note:''' try and activate a PDP context a few times. If failed, then reboot the module.
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* Use command '''AT+QIOPEN''' to open connection:
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AT+QIOPEN
OK
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'''Note:''' if failed – deactivate PDP context - use command '''AT+QIDEACT=<context ID>''' to deactivate PDP context.
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* Use command '''AT+QPING''' to ping a Remote Server:
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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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*1 –The context ID. The range is 1-16;
*1 –The context ID. The range is 1-16;
*8.8.8.8 - The host address in string type. The format is a dotted decimal IP address.
*8.8.8.8 - The host address in string type. The format is a dotted decimal IP address.
