Best posts made by fm

fm

I am not sure, but I think a lot (if not all) provider use some kind of corporate NAT. That means 10.207.152.99 is not an IP reachable from the Internet.

In my experience APN m2m.public.nl allows the modem to reach a server on the Internet, but not the other way round.

Can you ping 10.207.152.99 from the Internet?

As a test you could try to make a TCP connection (as client) from your modem to a TCP sever on the Internet and then check the client IP address in the log of the TCP server. If it is different from the above IP address then you know your provider is using a corporate NAT.

Thanks
Felix

fm

Hello guys

@Yassine-Amraue : thank you for explaining that there is a GUI and an API user. I’ve been banging my head trying to send a downlink message via API and always getting an ‘unauthorized’ error. But after registering a callback URL for the API user as well I can now send downlink messages via API to my device. Thanks again.

@magnatron : I am using a SIM7020 based device and previously via API sent downlink messages are getting delivered to it as soon as the device sends an uplink message.

Thanks
Felix

fm

Hello @Kevin-van-Bakel-0

I wonder if for some reason the connection was denied? Below line would indicate that:
12:37:03.468 -> +CREG: 3 // 3 means ‘registration denied’

Not sure, but below line looks like some ‘temporarily’ block for 15 minutes? With 210 seconds left?
13:16:19.260 -> *MRPM: PDN CONNECT BLOCK,2,210

Have you tried to issue a AT+COPS=? to see which networks actually are available for use with NB-IoT? (Note: can take some time to return the list of operators.)

Thanks
Felix

fm

Hello @meneerjacco

what about power saving mode? Maybe that’s enabled by accident?

AT+CPSMS?

Thanks
Felix

fm

Hello @Cees-Meijer

for me the SIM card provided with the NB-Iot starterkit also worked for LTE-M
to connect to my own server I used this APN: m2m.public.nl
I don’t think the dashboard is required when connecting to your own server
don’t know, but I guess the starterkit is limited to one station independent of the technology (NB-IoT or LTE-M) used

Thanks
Felix