nRF9160-DK , Modem_shell demo , ppp unable to access the Internet

RE: nRF9160-DK , Modem_shell demo , ppp unable to access the Internet

Håkon Alseth — Fri, 05 Nov 2021 14:30:39 GMT

Hi,

Are you still able to ping locally in the modem_shell application?

What I see is that your application does not populate the MTU size, while mine does:

*** Booting Zephyr OS build v2.6.99-ncs1-13-g20ac60fb9670  ***

MOSH version:       v1.7.0-325-gea83b7edbce1
MOSH build id:      custom
MOSH build variant: dev

Initializing modemlib...


mosh:~$ Initialized modemlib


Network registration status: searching
LTE cell changed: Cell ID: 21679616, Tracking area: 30401
Currently active system mode: LTE-M
RRC mode: Connected
Network registration status: Connected - home network
PSM parameter update: TAU: 3600, Active time: 0 seconds
mosh:~$ ppp up
modem data socket 4 created for modem data
PPP data socket 5 created
PPP net if up.

Modem config for system mode: LTE-M
Modem config for LTE preference: No preference, automatically selected by the modem
Currently active system mode: LTE-M
Modem FW version:      mfw_nrf9160_1.3.1
Operator PLMN:        "24201"
Current cell id:       21679616 (0x014ACE00)
Current band:          20
Current rsrp:          37: -104dBm
Current snr:           20: -5dB
Mobile network time and date: 21/11/05,14:24:47+04
PDP context info 1:
  CID:                0
  PDN ID:             0
  PDP context active: yes
  PDP type:           IPV4V6
  APN:                telenor.smart
  IPv4 MTU:           1500
  IPv4 address:       10.48.219.218
  IPv6 address:       2a02:2121:6b5:afad::ace:7717
  IPv4 DNS address:   193.213.112.4, 130.67.15.198
  IPv6 DNS address:   2001:4600:4:fff::52, 2001:4600:4:1fff::52
System time updated from cellular network

Here's the ping time to baidu.com via interface ppp0:

ping -I ppp0 baidu.com
PING baidu.com (220.181.38.251) from 10.48.219.218 ppp0: 56(84) bytes of data.
64 bytes from 220.181.38.251 (220.181.38.251): icmp_seq=1 ttl=44 time=357 ms
64 bytes from 220.181.38.251 (220.181.38.251): icmp_seq=2 ttl=44 time=396 ms
64 bytes from 220.181.38.251 (220.181.38.251): icmp_seq=3 ttl=44 time=368 ms
64 bytes from 220.181.38.251 (220.181.38.251): icmp_seq=4 ttl=44 time=406 ms

Kind regards,

Håkon

RE: nRF9160-DK , Modem_shell demo , ppp unable to access the Internet

JackyChen — Fri, 05 Nov 2021 01:34:01 GMT

Oh, I forget "ppp up"...

Now I enter “ppp up” and then "pppd ..." , ppp0 still no working in the PC...

RE: nRF9160-DK , Modem_shell demo , ppp unable to access the Internet

Håkon Alseth — Thu, 04 Nov 2021 14:07:24 GMT

Hi,

Could you try issuing "ppp up" before attaching via pppd?

It should print the following afterwards in the uart terminal:

mosh:~$ ppp up
modem data socket 4 created for modem data
PPP data socket 5 created
PPP net if up.

Kind regards,

Håkon

RE: nRF9160-DK , Modem_shell demo , ppp unable to access the Internet

JackyChen — Thu, 04 Nov 2021 13:30:26 GMT

No... because I change the computer to try, but I get the same result...

RE: nRF9160-DK , Modem_shell demo , ppp unable to access the Internet

Håkon Alseth — Thu, 04 Nov 2021 12:21:17 GMT

Did you issue "ppp up" in the terminal before attaching with "pppd ..." on the PC side?

Kind regards,

Håkon

RE: nRF9160-DK , Modem_shell demo , ppp unable to access the Internet

JackyChen — Thu, 04 Nov 2021 09:54:44 GMT

emmm... I have tried to type cmd "sudo pppd -detach /dev/ttyACM0 115200 noauth nocrtscts local" , but it unable to connect DK-board by ppp, it show

，

and the DK-board didn't react at all.

Thanks~

JackyChen

RE: nRF9160-DK , Modem_shell demo , ppp unable to access the Internet

Håkon Alseth — Thu, 04 Nov 2021 09:42:00 GMT

Hi,

The DNS and ping seems to work fine, but the PPP connection seems to be not functional.

Can you try to let it assign IP automatically, ie. do not specify it directly? It seems that you've tried several of these settings before, but I'm unsure which you've connected to when trying to ping.

sudo pppd -detach /dev/ttyACM0 115200 noauth nocrtscts local

Kind regards,

Håkon

RE: nRF9160-DK , Modem_shell demo , ppp unable to access the Internet

JackyChen — Thu, 04 Nov 2021 03:01:36 GMT

I try reset, power on and Off the dk-board again, change the computer, it fail too.

Thanks~

JackyChen

RE: nRF9160-DK , Modem_shell demo , ppp unable to access the Internet

JackyChen — Thu, 04 Nov 2021 02:46:01 GMT

Yep, I do what I said before, the result is like this:

the DK board can get the dns and I can ping www. website, but I try to connect the DK board with ppp on the other terminal, it failed.

What should I do next?

Thanks~

JackeyChen

RE: nRF9160-DK , Modem_shell demo , ppp unable to access the Internet

Håkon Alseth — Wed, 03 Nov 2021 14:11:06 GMT

Hi,

[quote user="leadercxn"]It looks like it got the DNS.[/quote]

Yes, that is great!

[quote user="leadercxn"]So, Should I type AT cmd "AT%XEPCO=0" to the modem_shell that I previously ran ,if I using modem_shell demo?[/quote]

Yes, that is correct.

Kind regards,

Håkon

RE: nRF9160-DK , Modem_shell demo , ppp unable to access the Internet

JackyChen — Wed, 03 Nov 2021 05:45:29 GMT

Just like this?

It looks like it got the DNS.

So, Should I type AT cmd "AT%XEPCO=0" to the modem_shell that I previously ran ,if I using modem_shell demo?

Thanks~

JackyChen

RE: nRF9160-DK , Modem_shell demo , ppp unable to access the Internet

Håkon Alseth — Tue, 02 Nov 2021 13:08:29 GMT

You can try either the precompiled .hex file, which already enables legacy PCO (ie. nrf9160dk_asset_tracker_v2_nbiot_legacy_pco_2021-06-25_7a076c22.hex) and see if it also fails on the getaddrinfo() call, or you can add the AT command to the mqtt_simple sample that you previously ran.

Kind regards,

Håkon

RE: nRF9160-DK , Modem_shell demo , ppp unable to access the Internet

JackyChen — Tue, 02 Nov 2021 11:29:18 GMT

enable legacy PCO ? Do you mean programme the firmware "nrf9160dk_asset_tracker_v2_nbiot_legacy_pco_2021-06-25_7a076c22.hex"

and then type AT cmd "AT%XEPCO=0" ?

Thanks~

JackyChen

RE: nRF9160-DK , Modem_shell demo , ppp unable to access the Internet

Håkon Alseth — Tue, 02 Nov 2021 07:49:00 GMT

Hi,

[quote user="leadercxn"]

I have modified "CONFIG_MQTT_BROKER_HOSTNAME="137.135.83.217" CONFIG_LTE_NETWORK_MODE_NBIOT=y " in prj.conf, here is the modem trace.Please check~

trace-2021-11-02T01-33-11.764Z.bin

[/quote]

This trace shows a working mqtt connection.

You can try to enable legacy PCO and see if this helps wrt. DNS:

AT%XEPCO=0

Kind regards,

Håkon

RE: nRF9160-DK , Modem_shell demo , ppp unable to access the Internet

JackyChen — Tue, 02 Nov 2021 01:39:42 GMT

Hi,

I have modified "CONFIG_MQTT_BROKER_HOSTNAME="137.135.83.217" CONFIG_LTE_NETWORK_MODE_NBIOT=y " in prj.conf, here is the modem trace.Please check~

devzone.nordicsemi.com/.../trace_2D00_2021_2D00_11_2D00_02T01_2D00_33_2D00_11.764Z.bin

Thanks~

JackyChen

RE: nRF9160-DK , Modem_shell demo , ppp unable to access the Internet

Håkon Alseth — Mon, 01 Nov 2021 11:10:42 GMT

Hi,

[quote user="leadercxn"]trace-2021-11-01T09-53-06.830Z.bin[/quote]

Thank you for the trace, but unfortunately it shows that you're still trying to attach to a network on LTE-M.

Could you try setting "CONFIG_LTE_NETWORK_MODE_NBIOT=y" in prj.conf and also try my former suggestion to see if it connects properly then?

Kind regards,

Håkon

RE: nRF9160-DK , Modem_shell demo , ppp unable to access the Internet

JackyChen — Mon, 01 Nov 2021 10:01:25 GMT

Hi,Håkon

Sorry I was late in replying. Here are my mqtt_simple with using modem_fw_v1.3.1,take a look at your spare time and see what's wrong with it.

Thanks~

JackyChen

devzone.nordicsemi.com/.../trace_2D00_2021_2D00_11_2D00_01T09_2D00_53_2D00_06.830Z.bin

RE: nRF9160-DK , Modem_shell demo , ppp unable to access the Internet

Håkon Alseth — Thu, 28 Oct 2021 13:49:13 GMT

Hi,

[quote user="leadercxn"]Yep, I have tried modem fw with v1.3.0, v1.3.1, they get the same result on at_client demo and modem_shell demo. I've tested all the firmware versions that can be replaced ,but nothing effective.[/quote]

Could you take a modem trace when running for instance "mqtt_simple" sample?

Here's a guide on how to do that: https://infocenter.nordicsemi.com/index.jsp?topic=%2Fug_trac_collector%2FUG%2Ftrace_collector%2Fintro.html

You could also try to resolve the mqtt-broker manually in the mqtt_simple project, and input this as the IP directly:

CONFIG_MQTT_BROKER_HOSTNAME="137.135.83.217"

That is the IP to "mqtt.eclipseprojects.io", which is the default mqtt broker that the sample connects to.

Kidn regards,

Håkon

RE: nRF9160-DK , Modem_shell demo , ppp unable to access the Internet

JackyChen — Wed, 27 Oct 2021 14:14:46 GMT

Hi, Håkon

Yep, I have tried modem fw with v1.3.0, v1.3.1, they get the same result on at_client demo and modem_shell demo. I've tested all the firmware versions that can be replaced ,but nothing effective.

It makes me feel helpless.

Thanks~

JackyChen

RE: nRF9160-DK , Modem_shell demo , ppp unable to access the Internet

Håkon Alseth — Wed, 27 Oct 2021 13:13:30 GMT

Hi,

[quote user="leadercxn"]mfw_nrf9160_1.2.3[/quote]

Not that it should matter, especially for DNS/IP connectivity, but can you try with a newer modem fw to see if this improves the scenario?

Kind regards,

Håkon

RE: nRF9160-DK , Modem_shell demo , ppp unable to access the Internet

JackyChen — Tue, 26 Oct 2021 07:02:47 GMT

Hi,

When I running at_client demo, the LTE Link Monitor shows

and the log :

AT

OK

AT+CEREG=5

OK

AT%XSYSTEMMODE=0,1,0,0

OK

AT+CFUN=1

OK

AT+CFUN?

+CFUN: 1

OK

AT+CGSN=1

+CGSN: "3526xxxxxxx8363"

OK

AT+CGMI

Nordic Semiconductor ASA

OK

AT+CGMM

nRF9160-SICA

OK

AT+CGMR

mfw_nrf9160_1.2.3

OK

AT+CEMODE?

+CEMODE: 0

OK

AT%XCBAND=?

%XCBAND: (1,2,3,4,5,8,12,13,17,19,20,25,26,28,66)

OK

AT+CMEE?

+CMEE: 0

OK

AT+CMEE=1

OK

AT+CNEC?

+CNEC: 0

OK

AT+CNEC=24

OK

AT+CGEREP?

+CGEREP: 0,0

OK

AT+CGDCONT?

OK

AT+CGACT?

OK

AT+CGEREP=1

OK

AT+CIND=1,1,1

OK

AT+CEREG=5

OK

AT+CEREG?

+CEREG: 5,4,"FFFE","FFFFFFFF",9,0,0,"00000000","00000000"

OK

AT%CESQ=1

OK

AT+CESQ

+CESQ: 99,99,255,255,255,255

OK

AT%XSIM=1

OK

AT%XSIM?

%XSIM: 1

OK

AT+CPIN?

+CPIN: READY

OK

AT+CPINR="SIM PIN"

+CPINR: "SIM PIN",3

OK

AT+CIMI

460xxxxxxxx7655

OK

%CESQ: 55,2,20,2

+CEREG: 2,"1D26","02D06D3D",9,0,0,"11100000","11100000"

%CESQ: 56,2,27,3

+CGEV: ME PDN ACT 0,0

+CNEC_ESM: 50,0

AT+CGDCONT?

+CEREG: 1,"1D26","02D06D3D",9,,,"11100000","11100000"

+CIND: "service",1

+CGDCONT: 0,"IP","cmiot","10.67.30.208",0,0

OK

AT+CGACT?

+CGACT: 0,1

OK

AT+CFUN?

+CFUN: 1

OK

AT+CGSN=1

+CGSN: "352xxxxxxxx8363"

OK

AT+CGMI

Nordic Semiconductor ASA

OK

AT+CGMM

nRF9160-SICA

OK

AT+CGMR

mfw_nrf9160_1.2.3

OK

AT+CEMODE?

+CEMODE: 0

OK

AT%XCBAND=?

%XCBAND: (1,2,3,4,5,8,12,13,17,19,20,25,26,28,66)

OK

AT+CMEE?

+CMEE: 1

OK

AT+CNEC?

+CNEC: 24

OK

AT+CGEREP?

+CGEREP: 1,0

OK

AT+CIND=1,1,1

OK

AT+CEREG=5

OK

AT+CEREG?

+CEREG: 5,1,"1D26","02D06D3D",9,,,"11100000","11100000"

OK

AT+COPS=3,2

OK

AT+COPS?

+COPS: 0,2,"46000",9

OK

AT%XCBAND

%XCBAND: 8

OK

AT+CGDCONT?

+CGDCONT: 0,"IP","cmiot","10.67.30.208",0,0

OK

AT+CGACT?

+CGACT: 0,1

OK

AT%CESQ=1

OK

AT+CESQ

+CESQ: 99,99,255,255,28,54

OK

AT%XSIM=1

OK

AT%XSIM?

%XSIM: 1

OK

AT+CPIN?

+CPIN: READY

OK

AT+CPINR="SIM PIN"

+CPINR: "SIM PIN",3

OK

AT+CIMI

460xxxxxxxx7655

OK

%CESQ: 55,2,17,2

%CESQ: 54,2,27,3

%CESQ: 54,2,17,2


It shows that the network is working.

RE: nRF9160-DK , Modem_shell demo , ppp unable to access the Internet

Håkon Alseth — Mon, 25 Oct 2021 13:46:44 GMT

Hi,

[quote user="leadercxn"]Could you push your model_shell firmware and modem-firmware here, I can dowanload them for test on my side.[/quote]

This will not help, as the issues you're seeing is network related, not firmware related.

[quote user="leadercxn"]

I use China-Mobile SIM card which is dedicated for IOT, their technical support said that IP and DNS are obtained at the same time.

I plug the SIM card into my phone , my phone can surf the Internet with this SIM card.

So, I'm not sure if there's a compatibility problem with the way to gets DNS?

[/quote]

Could you please try to run "at_client" sample on your nRF9160?

This should be used in combination with LTE Link Monitor (available inside nRF Connect for Desktop), which enables network related error codes.

What you should issue of commands in there to enable NB1 and start the network connection:

AT+CEREG=5
AT%XSYSTEMMODE=0,1,0,0
AT+CFUN=1
AT+CFUN?

Could you then let it log for some minutes and share the log with me?

Kind regards,

Håkon

RE: nRF9160-DK , Modem_shell demo , ppp unable to access the Internet

JackyChen — Mon, 25 Oct 2021 03:17:04 GMT

Hi,Håkon

Could you push your model_shell firmware and modem-firmware here, I can dowanload them for test on my side.

Thanks.

JackeyChen

RE: nRF9160-DK , Modem_shell demo , ppp unable to access the Internet

JackyChen — Mon, 25 Oct 2021 03:08:15 GMT

I use China-Mobile SIM card which is dedicated for IOT, their technical support said that IP and DNS are obtained at the same time.

I plug the SIM card into my phone , my phone can surf the Internet with this SIM card.

So, I'm not sure if there's a compatibility problem with the way to gets DNS?

RE: nRF9160-DK , Modem_shell demo , ppp unable to access the Internet

Håkon Alseth — Fri, 22 Oct 2021 07:35:34 GMT

Hi,

You need to contact your network provider and ask what is supported in their network. I also see that you are not getting PSM from the network, and you're in total connected to three different cell towers in your log.

Which provider are you connecting to?

Kind regards,

Håkon