nrf9160 modem get stuck in LTE seaching

RE: nrf9160 modem get stuck in LTE seaching

Håkon Alseth — Tue, 09 Nov 2021 14:46:34 GMT

Hi,

It looks to connect and run as expected, LTE network wise, but you're getting an error on the message size:

2021-11-09T13:24:50.639Z DEBUG modem << [00:01:12.078,552] [1;31m<err> mqtt_simple: publish_get_payload failed: -122[0m

This translates to:

https://github.com/eblot/newlib/blob/master/newlib/libc/include/sys/errno.h#L153

This is because the default buffer size is 128, which can be adjusted using config "CONFIG_MQTT_PAYLOAD_BUFFER_SIZE"

Kind regards,

Håkon

RE: nrf9160 modem get stuck in LTE seaching

ced27 — Tue, 09 Nov 2021 14:44:24 GMT

[quote userid="107891" url="~/f/nordic-q-a/81398/nrf9160-modem-get-stuck-in-lte-seaching/338186#338186"]The next issue is just that i can't connect to the server yet?[/quote]

Here is what i got, when i try to reach the server over NB_Iot:

devzone.nordicsemi.com/.../2021_2D00_11_2D00_09T14_5F00_33_5F00_08.503Z_2D00_log.txt

ERROR: getaddrinfo failed -11: which stands for No more processes.

what does that means for me?

RE: nrf9160 modem get stuck in LTE seaching

ced27 — Tue, 09 Nov 2021 13:32:17 GMT

[quote userid="2115" url="~/f/nordic-q-a/81398/nrf9160-modem-get-stuck-in-lte-seaching/338177#338177"]Could you try a TCP based sample to see if it has specific issues? A log would be great to see as well.[/quote]

devzone.nordicsemi.com/.../2021_2D00_11_2D00_09T13_5F00_21_5F00_26.182Z_2D00_log.txt

The LTE search is now faster, if you ask me why i have no idea.

The next issue is just that i can't connect to the server yet?

RE: nrf9160 modem get stuck in LTE seaching

Håkon Alseth — Tue, 09 Nov 2021 13:11:23 GMT

Hi Cedric,

both coap and the udp sample are UDP based, while the latter one only sends data.

Could you try a TCP based sample to see if it has specific issues? A log would be great to see as well.

Kind regards,

Håkon

RE: nrf9160 modem get stuck in LTE seaching

ced27 — Tue, 09 Nov 2021 09:49:43 GMT

Hi Hakon,

Thanks for your reply.

[quote userid="2115" url="~/f/nordic-q-a/81398/nrf9160-modem-get-stuck-in-lte-seaching/338072#338072"]Is this due to the network connectivity, or the connection to the server?[/quote]

I think it is due to the network NAT timeout. Can that be the case? what do you think?

[quote userid="2115" url="~/f/nordic-q-a/81398/nrf9160-modem-get-stuck-in-lte-seaching/338072#338072"]Is the communication still unstable with other samples, like mqtt_simple?[/quote]

Yes, the same think with udp_sample and coap_sample.

Best regards,

Cedric

RE: nrf9160 modem get stuck in LTE seaching

Håkon Alseth — Tue, 09 Nov 2021 09:05:00 GMT

Hi,

[quote user="ced27"]

i have found that my modem get stuck in searching not because i am out of data. Despite the fact that I bought some data, i still got the same issue. What do you think will be the appropriate solution?

As soon as i get a connection to the server and that a DTLS handshake has been done and my payload was sent, the connection to the server will then be stopped and the cycle continuous. How can i make sure, that the connection to server stays?

[/quote]

Is this due to the network connectivity, or the connection to the server?

Is the communication still unstable with other samples, like mqtt_simple?

Kind regards,

Håkon

RE: nrf9160 modem get stuck in LTE seaching

ced27 — Mon, 08 Nov 2021 09:37:09 GMT

[quote userid="2115" url="~/f/nordic-q-a/81398/nrf9160-modem-get-stuck-in-lte-seaching/337732#337732"]It seems that you're out of data, yes. You can buy more if you click the "buy data" button.[/quote]

Hi Håkon Alseth,

Best regards,

Cedric

RE: nrf9160 modem get stuck in LTE seaching

Håkon Alseth — Fri, 05 Nov 2021 14:31:23 GMT

Hi,

It seems that you're out of data, yes. You can buy more if you click the "buy data" button.

Kind regards,

Håkon

RE: nrf9160 modem get stuck in LTE seaching

ced27 — Fri, 05 Nov 2021 11:11:21 GMT

[quote userid="2115" url="~/f/nordic-q-a/81398/nrf9160-modem-get-stuck-in-lte-seaching/337657#337657"]I had a chat with our local sales director in your area. If you have a iBasis, it should roam towards Telefonica, which should be reported back with mcc/mnc 262 03. The reception can be spotty in some areas, so you should consider getting a Arkessa sim in addition, which roams towards other network providers as well.[/quote]

Thanks for your suggestions.

[quote userid="2115" url="~/f/nordic-q-a/81398/nrf9160-modem-get-stuck-in-lte-seaching/337657#337657"]If you log into nrfcloud, you should be able to see the status of your SIM card in the cloud view, under "sim cards" - could you check if this still shows that you have data left?[/quote]

i still have like 0.22Mb left. Here is a screenshot:

Do you think is because of that? if yes, what can i do, buy Data i suppose?

RE: nrf9160 modem get stuck in LTE seaching

Håkon Alseth — Fri, 05 Nov 2021 10:56:48 GMT

Hi,

I had a chat with our local sales director in your area. If you have a iBasis, it should roam towards Telefonica, which should be reported back with mcc/mnc 262 03. The reception can be spotty in some areas, so you should consider getting a Arkessa sim in addition, which roams towards other network providers as well.

If you log into nrfcloud, you should be able to see the status of your SIM card in the cloud view, under "sim cards" - could you check if this still shows that you have data left?

Kind regards,

Håkon

RE: nrf9160 modem get stuck in LTE seaching

ced27 — Fri, 05 Nov 2021 10:22:13 GMT

[quote userid="2115" url="~/f/nordic-q-a/81398/nrf9160-modem-get-stuck-in-lte-seaching/337645#337645"]

Do you have a solder-able eSIM, or a "normal" nano SIM card like this (ie. the same that comes with the nRF9160 DK)?

[/quote]

I am using the normal nano SIM card, that came with the nRF9160 DK

My SIM card hat the EID: 8949320005262167085

[quote userid="2115" url="~/f/nordic-q-a/81398/nrf9160-modem-get-stuck-in-lte-seaching/337645#337645"]

This shows that you have two networks available in your area, but which one were you successfully connected to in the previous log (where it took 20 minutes)?

[/quote]

It was Telekom Deutschland GmbH

RE: nrf9160 modem get stuck in LTE seaching

Håkon Alseth — Fri, 05 Nov 2021 10:10:47 GMT

Hi,

[quote user="ced27"]

I got a response from iBasis and that is what they said, i quote: "The eSIM in the kit is meant as a test sim card, so you will not be able to connect it over the internet"

what does that mean for me?

[/quote]

I am not sure what iBasis means here, you should ask them for a clarification.

Do you have a solder-able eSIM, or a "normal" nano SIM card like this (ie. the same that comes with the nRF9160 DK)?

[quote user="ced27"]Here is what i got:[/quote]

This shows that you have two networks available in your area, but which one were you successfully connected to in the previous log (where it took 20 minutes)?

Kind regards,

Håkon

RE: nrf9160 modem get stuck in LTE seaching

ced27 — Fri, 05 Nov 2021 09:30:04 GMT

[quote userid="2115" url="~/f/nordic-q-a/81398/nrf9160-modem-get-stuck-in-lte-seaching/337630#337630"]Could it be that your SIM is out of data?[/quote]

I got a response from iBasis and that is what they said, i quote: "The eSIM in the kit is meant as a test sim card, so you will not be able to connect it over the internet"

what does that mean for me?

[quote userid="2115" url="~/f/nordic-q-a/81398/nrf9160-modem-get-stuck-in-lte-seaching/337630#337630"]Could you also query "at+cops?" so I can see which network you're currently connected to?[/quote]

Here is what i got:

AT+COPS=?
+COPS: (1,"","","26202",7),(1,"","","26201",7)
OK
AT+COPS?
+COPS: 0
OK

Screenshot:

RE: nrf9160 modem get stuck in LTE seaching

Håkon Alseth — Fri, 05 Nov 2021 09:07:10 GMT

Hi Cedric,

Could it be that your SIM is out of data?

The behavior is then different from network-to-network, in some networks all looks good, but you get no connectivity at all, like in your case.

Could you also query "at+cops?" so I can see which network you're currently connected to?

iBasis' roaming agreement only covers telefonica in germany, so it could be useful to check out other vendors (Arkessa for instance).

Kind regards,

Håkon

RE: nrf9160 modem get stuck in LTE seaching

ced27 — Thu, 04 Nov 2021 15:05:07 GMT

Hi Hakon,

Here is what i got this time:

devzone.nordicsemi.com/.../2021_2D00_11_2D00_04T13_5F00_56_5F00_54.774Z_2D00_log.txt

The modem got stuck in searching, even after one hour of searching still nothing.

Hopefully you can help me find why is it that way

Best regards,

Cedric

RE: nrf9160 modem get stuck in LTE seaching

Håkon Alseth — Thu, 04 Nov 2021 13:52:17 GMT

My apologies.

Could you ensure that automatic requests is checked in the lower right corner of the application?

Kind regards,

Håkon

RE: nrf9160 modem get stuck in LTE seaching

ced27 — Thu, 04 Nov 2021 13:01:02 GMT

[quote userid="2115" url="~/f/nordic-q-a/81398/nrf9160-modem-get-stuck-in-lte-seaching/337470#337470"]Could you run this in LTE Link Monitor?[/quote]

I issued all the commands directly in LTE Link Monitor after i ran at_client. Should i run it a little longer?

But as usual before connecting it takes much time

RE: nrf9160 modem get stuck in LTE seaching

Håkon Alseth — Thu, 04 Nov 2021 12:45:40 GMT

Hi Cedric,

It shows that you're connected (roaming state) after approx. 18 minutes, but I was hoping to get more information out here.

Could you run this in LTE Link Monitor? This applies, by default, a series of AT commands when you query AT+CFUN?.

Kind regards,

Håkon

RE: nrf9160 modem get stuck in LTE seaching

ced27 — Thu, 04 Nov 2021 12:32:35 GMT

Hi Hakon,

Thanks for your reply.

Here is what i got:

devzone.nordicsemi.com/.../2021_2D00_11_2D00_04T12_5F00_08_5F00_09.044Z_2D00_log.txt

Best regards,

Cedric

RE: nrf9160 modem get stuck in LTE seaching

Håkon Alseth — Thu, 04 Nov 2021 12:01:51 GMT

Hi,

Could you try to connect with at_client firmware, in combination with LTE Link Monitor (from nRF Connect for Desktop) and issue these commands?

AT+CEREG=5
AT+CFUN=1
AT+CFUN?

Let it run for 10 minutes and post the log here.

Kind regards,

Håkon