Difference between revisions of "Mobile data connection troubleshooting"
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This is a quick guide to help in the debugging process of a router if encounters issues with mobile data connection. | This is a quick guide to help in the debugging process of a router if encounters issues with mobile data connection. | ||
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| − | * First, to establish a data connection only through mobile module on RUT, you need connect to router via CLI/SSH (use SSH software such as | + | * First, to establish a data connection only through mobile module on RUT, you need connect to router via CLI/SSH (use SSH software such as Putty): |
CLI/SSH username: root | CLI/SSH username: root | ||
CLI/SSH password: <your router’s password> | CLI/SSH password: <your router’s password> | ||
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* Connect to mobile module of the router: | * Connect to mobile module of the router: | ||
... | ... | ||
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+CREG: 1,"008B","012CD17",7 | +CREG: 1,"008B","012CD17",7 | ||
... | ... | ||
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| − | * | + | * Most likely you will not see anything and that’s because screen echo might 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 | ||
OK | OK | ||
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at+qcsq=0 | at+qcsq=0 | ||
OK | OK | ||
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OK | OK | ||
... | ... | ||
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| − | * Check communication (wait for the module to respond | + | * Check communication (wait for the module to respond OK): |
... | ... | ||
AT | AT | ||
OK | OK | ||
... | ... | ||
| − | -- | + | 4. Query SIM card status: |
| + | • AT+CPIN? | ||
| + | 5. If PIN is required, initialize modem with your PIN code: | ||
| + | • AT+CPIN="xxxx" | ||
| + | 6. Check SIM card status again (Reboot the module if it fails to identify SIM): | ||
| + | • AT+CPIN? | ||
| + | 7. Check GSM connection (OK means that the module has registered on CS domain service): | ||
| + | • AT+CREG | ||
| + | 8. Check PS Service (OK means that the module has registered in UMTS/LTE network) | ||
| + | • AT+CGREG | ||
| + | 9. Configure APN, user name, password and auth type by AT+QICSGP | ||
| + | • 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 | ||
| − | + | 10. Activate a PDP context: | |
| − | + | • AT+QIACT=<contextID> | |
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| − | + | 11. Query IP Address of the PDP context: | |
| + | • AT+QIACT? | ||
| + | (*Try and activate a PDP context a few times. If failed, then reboot the module). | ||
| + | 12. Open connection: | ||
| + | • AT+QIOPEN | ||
| + | (*If failed – deactivate PDP context - use command AT+QIDEACT=<context ID> to deactivate PDP context.) | ||
| + | 13. Use AT commands to ping a Remote Server | ||
| + | • AT+QPING=1,"8.8.8.8" | ||
| + | *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. | ||
| + | Response: | ||
| + | • If ping a remote server successfully, response: OK (means that the module works properly) | ||
| + | • If there is any error, response: ERROR (means the problem is in the module) | ||
| − | + | Example fo the provided configuration: | |
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| − | Example | ||
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Revision as of 21:51, 19 May 2020
This is a quick guide to help in the debugging process of a router if encounters issues with mobile data connection.
- First, to establish a data connection only through mobile module on RUT, you need connect to router via CLI/SSH (use SSH software such as Putty):
CLI/SSH username: root CLI/SSH password: <your router’s password>
- Connect to mobile module of the router:
... 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 +CREG: 1,"008B","012CD17",7 ...
- Most likely you will not see anything and that’s because screen echo might 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:
... ATE1 OK at+qcsq=0 OK at+creg=0 OK ...
- Check communication (wait for the module to respond OK):
... AT OK ...
4. Query SIM card status: • AT+CPIN? 5. If PIN is required, initialize modem with your PIN code: • AT+CPIN="xxxx" 6. Check SIM card status again (Reboot the module if it fails to identify SIM): • AT+CPIN? 7. Check GSM connection (OK means that the module has registered on CS domain service): • AT+CREG 8. Check PS Service (OK means that the module has registered in UMTS/LTE network) • AT+CGREG 9. Configure APN, user name, password and auth type by AT+QICSGP • 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
10. Activate a PDP context: • AT+QIACT=<contextID>
11. Query IP Address of the PDP context: • AT+QIACT? (*Try and activate a PDP context a few times. If failed, then reboot the module). 12. Open connection: • AT+QIOPEN (*If failed – deactivate PDP context - use command AT+QIDEACT=<context ID> to deactivate PDP context.) 13. Use AT commands to ping a Remote Server • AT+QPING=1,"8.8.8.8"
- 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.
Response: • If ping a remote server successfully, response: OK (means that the module works properly) • If there is any error, response: ERROR (means the problem is in the module)
Example fo the provided configuration:
