RE: nRF9160 - no LTE-NB connection [LTE Link Monitor]

Martin Lesund — Thu, 05 Mar 2020 15:02:11 GMT

Hi Nikola,

I am not familiar with the Fusion SIM card since I suspect the issue lies there.

There does not seem to be any issues with the HW or FW in this case, only an issue getting an attachment to the network.

First of you need to know what networks are in your area that supports NB-IoT and since the Fusion SIM card needs to roam on the network in your area, they need to have a roaming agreement with the carrier that owns the network in your area.

Some suggestions that you can try out before you turn ON the modem (AT+CFUN=1):

AT%XEPCO=0 (some networks do not support ePCO feature, so let's try legacy)

Then set the connection parameters with CID1 instead of 0:

AT+CGDCONT=1,"IP","m2m.fusion-iot.de"

Then activate the PDN connection:

AT+CGACT=1,1

Then try to turn ON the modem (AT+CFUN=1)

(please share the log output if you still do not get a connection)

If that does not work I would suggest getting in contact with the Fusion team if there are some steps you need to do to activate or register their SIM card.

The iBasis SIM is not yet supported for the NB-IoT network in your area.

Another option could be getting a SIM card from your local carrier since they will allow connections to their home network.

(The SIM switch should always be set to "SIM" unless you have soldered on an embedded SIM)

RE: nRF9160 - no LTE-NB connection [LTE Link Monitor]

NikolaiJimmy — Sat, 29 Feb 2020 22:45:21 GMT

Addition: Please ignore the eSIM-Sim switching line, i have set it on SIM (thinking error while writing this)