Cat M1 / NB-IoT Modem
NWK030
Troubleshooting
U-blox provides a GUI program (
https://www.u-blox.com/en/product/m-center
) to send AT commands to the modem if using PuTTY
becomes too difficult.
For network Connectivity issues, a SIM swap using a known good SIM should suffice in troubleshooting if the SIM or modem is at fault.
When putting in a new SIM, use the AT commands above to check APN, Number, ICCID, and do a connectivity test.
If a known good SIM doesn’t fix the issue, loading the default values for the card may also aid in troubleshooting.
AT&V
Display the default values
AT&F
Load the default values
Using the above commands followed by a system reset should help with troubleshooting issues with the modem + SIM.
Check Internet Connectivity (TCP)
This test sends a TCP packet to u-blox’s test server and then reads the return followed by closing the socket.
• TCP - Create socket and then open it
• AT+USOCR=6
• AT+USOCO=0,”195.34.89.241” ,7
• AT+USORD=0,32
• AT+USOCL=0
Known Limitations
The NWK030 will not have a cellular network connection that the Operating System’s network managing application can use. This
means that you can not select the “Cellular” network option from the system tray and then open a browser and begin browsing the
web. An application must be developed by you to interface with the modem and transfer data.
NWK030 requires SIM cards specific to Cat M1 and NB-IoT networks. Standard 4G/LTE SIM cards, even the same form factor, may not
function in this cellular modem.
The NWK030 is intended to use applications developed by the user to interface with the modem and do data transfers. By
the nature of Cat M1 / NB-IoT operating systems will not be able use the connection directly (i.e. Network Managers).
Code Examples & Other Useful Resources
To learn more about how to configure the product for specific uses and advanced functionality, visit OnLogic’s technical support
https://www.onlogic.com/support/
.
US Office
Phone: +1 802 861 2300
Email: [email protected]
www.onlogic.com
EU Office
Phone: +31 088 5200 700
Email: [email protected]
www.onlogic.com
15
