Mobile data connection troubleshooting: Difference between revisions
Mobile data connection troubleshooting (view source)
Revision as of 21:14, 19 May 2020
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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: | ||
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ATE1 | ATE1 | ||
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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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AT | AT | ||
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==Debugging process== | ==Debugging process== | ||
* | * If PIN is required, initialize modem with your PIN code: | ||
... | |||
AT+CPIN="xxxx" | |||
... | |||
* Use command '''AT+CPIN''' to query SIM card status: | |||
... | |||
AT+CPIN? | |||
+CPIN: READY | |||
... | |||
'''Note:''' Reboot the module if it fails to identify SIM | |||
* Use command '''AT+CREG''' to check GSM connection: | |||
... | |||
AT+CREG? | |||
+CREG: 0,1 | |||
OK | |||
... | |||
'''Note:''' OK means that the module has registered on CS domain service | |||
* Use command '''AT+CGREG''' to check PS Service: | |||
... | |||
AT+CGREG? | |||
+CGREG: 0,1 | |||
OK | |||
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'''Note:''' OK means that the module has registered in UMTS/LTE network | |||
9. Configure APN, user name, password and auth type by AT+QICSGP | 9. Configure APN, user name, password and auth type by AT+QICSGP | ||
• AT+QICSGP=<contextID>[,<context_type>,<APN>[,<username>,<password>)[,<authentication>]]] | • AT+QICSGP=<contextID>[,<context_type>,<APN>[,<username>,<password>)[,<authentication>]]] | ||