mqtt_simple sample gets error -2 in getaddrinfo

[tomtomtom2401]

Hello,

We have developed our own module based on the nrf9160 DK and want to use it to send data to a MQTT broker. A few days ago on the dev-kit everything worked fine, now the new PCBs have arrived and we get this error in the mqtt_simple sample (as well as in our own code, but in a little different format):

 *** Booting Zephyr OS build v3.2.99-ncs1 ***                                      
[00:00:00.504,638] <inf> mqtt_simple: The MQTT simple sample started               
[00:00:00.504,699] <inf> mqtt_simple: Disabling PSM and eDRX                              
[00:00:00.505,401] <inf> mqtt_simple: LTE Link Connecting...                              
[00:00:09.277,618] <inf> mqtt_simple: LTE Link Connected!                                 
[00:00:09.277,862] <err> mqtt_simple: getaddrinfo failed: -2                              
[00:00:09.277,893] <err> mqtt_simple: Failed to initialize broker connection              
[00:00:09.277,893] <err> mqtt_simple: client_init: -10   

We just added the following config lines to use NB-IoT in the sample:

CONFIG_LTE_NETWORK_MODE_NBIOT=y
CONFIG_LTE_MODE_PREFERENCE_NBIOT=y

When using the IP address of the moquitto test server, it works perfectly fine.

*** Booting Zephyr OS build v3.2.99-ncs1 ***                                      
[00:00:00.568,603] <inf> mqtt_simple: The MQTT simple sample started                      
[00:00:00.568,664] <inf> mqtt_simple: Disabling PSM and eDRX                              
[00:00:00.569,366] <inf> mqtt_simple: LTE Link Connecting...                              
[00:00:11.186,523] <inf> mqtt_simple: LTE Link Connected!                                 
[00:00:11.186,950] <inf> mqtt_simple: IPv4 Address found 91.121.93.94                     
[00:00:11.187,438] <dbg> mqtt_simple: client_id_get: client_id = nrf-2EB11F7FD373E99C     
[00:00:11.598,114] <inf> mqtt_simple: MQTT client connected                               
[00:00:11.598,144] <inf> mqtt_simple: Subscribing to: my/subscribe/topic len 22       
[00:00:11.746,185] <inf> mqtt_simple: SUBACK packet id: 1234                              
[00:06:48.615,112] <inf> mqtt_simple: MQTT PUBLISH result=0 len=15                        
[00:06:48.615,203] <inf> mqtt_simple: Received: test with ip address                           
[00:06:48.615,783] <inf> mqtt_simple: Publishing: test with ip address                         
[00:06:48.615,814] <inf> mqtt_simple: to topic: my/publish/topic len: 20              
[00:06:48.761,352] <inf> mqtt_simple: PUBACK packet id: 39802 

Has anybody an idea? 

We are using the NCS v2.2.0 with the toolchain 2.2.0 (but tried the 2.1.0 as well, as we used with the dev-kit), modem firmware is 1.2.3

Edit: I forgot to add: when using the same code on the dev-kit, it works also fine with the IP Address and the URL. Modem firmware is here also 1.2.3 - thats the reason we choose 1.2.3 instead of 1.3.3. We also use the same SIM card to prevent any errors from the provider side (bad DNS, APN, whatever...)

Thank you!

BR Thomas

[Hakon]

Hello,

which SIM card are you using?

[tomtomtom2401]

Hello,

We are using a m2m SIM from company "drei" from Austria. I've used the very same SIM card in the dev kit and in our module to exclude any errors from this side.
In the meantime, I tried to set the DNS manually (like in thread), but it only works randomly and only once after flashing the modem firmware. Then it looks like its running into a timeout and a watchdog restarts the module.

BR Thomas

[tomtomtom2401]

After a lot of reading we found a connection between the DNS lookup and the PDN setting of the modem - please correct me if I'm wrong.

We found one difference on the provider side (with the same SIM used): the "PDN max BW UL" and  "PDN max BW DL" is higher. (8000000/8000000 on the devkit to 50000000/150000000)
For my understanding this is the max. bandwidth for uplink and downlink - so it should not be the cause of the DNS problem?

[Achim Kraus]

> "PDN max BW UL" and  "PDN max BW DL" is higher. (8000000/8000000 on the devkit to 50000000/150000000)

Do you operate both, DK & other device, at the same location?

The "trace_with_dns.pcapng" shows in my opinion several "connects", what may explain the different ip-addresses and why the response doesn't reach the device. That may be caused by a instable network connection.

With newer firmware & sdk, you may also log the PDN callbacks (I guess that's changing), read the modem status with "AT%XMONITOR",  "AT+CGDCONT?" and "AT+CEINFO?". That would help to see, if the PDN context is changing and what signal conditions the device has.

With 1.2.3 you may check, what's available.

I would remove the call to "nrf_setdnsaddr", add some of the additional AT commands, reset the device config once with "AT%XFACTORYRESET=0" and then let the device run for a couple of minutes. Sometimes a first stable connect takes 1 or 2 minutes.

[tomtomtom2401]

Yes, they are both on my desk.

By the way: with the nrf_setdnsaddr the device reboots after a while. but I think I stopped the trace short before rebooting.

I have done a trace with the device trying to get the dns address every 10s and the AT commands described as described:

mqtt_simple_dns_request_redo.bin

mqtt_simple_dns_request_redo.pcapng

and the log output:

Fullscreen capture_2023-02-01_0900.txt Download

*** Booting Zephyr OS build v3.2.99-ncs1 ***
[00:00:00.604,675] <inf> nrf_modem_lib_trace: Trace thread ready
[00:00:00.606,140] <inf> nrf_modem_lib_trace: Trace level override: 2
[00:00:00.611,389] <inf> mqtt_simple: The MQTT simple sample started
[00:00:00.639,465] <inf> mqtt_simple: Modem response / reset: OK

[00:00:00.639,465] <inf> mqtt_simple: Disabling PSM and eDRX
[00:00:00.640,991] <inf> mqtt_simple: Modem response / monitor: %XMONITOR: 4
OK

[00:00:00.641,479] <inf> mqtt_simple: Modem response / CGDCONT: OK

[00:00:00.642,028] <inf> mqtt_simple: Modem response / CEINFO: +CEINFO: 0,1,I,0,0,255,127
OK

[00:00:00.642,059] <inf> mqtt_simple: LTE Link Connecting...
[00:00:12.160,125] <inf> mqtt_simple: LTE Link Connected!
[00:00:12.160,949] <inf> mqtt_simple: Modem response / monitor: %XMONITOR: 1,"","","23205","7615",9,3,"018B7DDE",292,1401,53,41,"","11100000","11100000","01010100"
OK

[00:00:12.161,468] <inf> mqtt_simple: Modem response / CGDCONT: +CGDCONT: 0,"IP","m2m.drei.at","10.71.192.243",0,0
OK

[00:00:12.162,017] <inf> mqtt_simple: Modem response / CEINFO: +CEINFO: 0,1,C,8,1,-88,16
OK

[00:00:12.162,292] <inf> mqtt_simple: getaddrinfo result: -2
[00:00:22.163,208] <inf> mqtt_simple: Modem response / monitor: %XMONITOR: 1,"3AT","3AT","23205","7615",9,3,"018B7DDE",292,1401,54,46,"","11100000","11100000","01010100"
OK

[00:00:22.163,879] <inf> mqtt_simple: Modem response / CGDCONT: +CGDCONT: 0,"IP","m2m.drei.at","10.71.192.243",0,0
OK

[00:00:22.164,550] <inf> mqtt_simple: Modem response / CEINFO: +CEINFO: 0,1,C,8,1,-87,21
OK

[00:00:22.164,886] <inf> mqtt_simple: getaddrinfo result: -2
[00:00:32.174,163] <inf> mqtt_simple: Modem response / monitor: %XMONITOR: 1,"3AT","3AT","23205","7615",9,3,"018B7DDE",292,1401,54,42,"","11100000","11100000","01010100"
OK

[00:00:32.174,743] <inf> mqtt_simple: Modem response / CGDCONT: +CGDCONT: 0,"IP","m2m.drei.at","10.71.192.243",0,0
OK

[00:00:32.175,476] <inf> mqtt_simple: Modem response / CEINFO: +CEINFO: 0,1,I,8,2,-87,17
OK

[00:00:32.175,811] <inf> mqtt_simple: getaddrinfo result: -2
[00:00:42.185,119] <inf> mqtt_simple: Modem response / monitor: %XMONITOR: 1,"3AT","3AT","23205","7615",9,3,"018B7DDE",292,1401,55,40,"","11100000","11100000","01010100"
OK

[00:00:42.185,699] <inf> mqtt_simple: Modem response / CGDCONT: +CGDCONT: 0,"IP","m2m.drei.at","10.71.192.243",0,0
OK

[00:00:42.186,248] <inf> mqtt_simple: Modem response / CEINFO: +CEINFO: 0,1,I,8,2,-86,15
OK

[00:00:42.186,584] <inf> mqtt_simple: getaddrinfo result: -2
[00:00:52.195,892] <inf> mqtt_simple: Modem response / monitor: %XMONITOR: 1,"3AT","3AT","23205","7615",9,3,"018B7DDE",292,1401,54,40,"","11100000","11100000","01010100"
OK

[00:00:52.196,441] <inf> mqtt_simple: Modem response / CGDCONT: +CGDCONT: 0,"IP","m2m.drei.at","10.71.192.243",0,0
OK

[00:00:52.196,960] <inf> mqtt_simple: Modem response / CEINFO: +CEINFO: 0,1,I,8,2,-87,15
OK

[00:00:52.197,326] <inf> mqtt_simple: getaddrinfo result: -2
[00:01:02.206,604] <inf> mqtt_simple: Modem response / monitor: %XMONITOR: 1,"3AT","3AT","23205","7615",9,3,"018B7DDE",292,1401,54,40,"","11100000","11100000","01010100"
OK

[00:01:02.207,336] <inf> mqtt_simple: Modem response / CGDCONT: +CGDCONT: 0,"IP","m2m.drei.at","10.71.192.243",0,0
OK

[00:01:02.207,916] <inf> mqtt_simple: Modem response / CEINFO: +CEINFO: 0,1,I,8,2,-87,15
OK

[00:01:02.208,221] <inf> mqtt_simple: getaddrinfo result: -2
[00:01:12.217,498] <inf> mqtt_simple: Modem response / monitor: %XMONITOR: 1,"3AT","3AT","23205","7615",9,3,"018B7DDE",292,1401,54,42,"","11100000","11100000","01010100"
OK

[00:01:12.218,048] <inf> mqtt_simple: Modem response / CGDCONT: +CGDCONT: 0,"IP","m2m.drei.at","10.71.192.243",0,0
OK

[00:01:12.218,597] <inf> mqtt_simple: Modem response / CEINFO: +CEINFO: 0,1,I,8,2,-87,17
OK

[00:01:12.218,933] <inf> mqtt_simple: getaddrinfo result: -2
[00:01:22.219,818] <inf> mqtt_simple: Modem response / monitor: %XMONITOR: 1,"3AT","3AT","23205","7615",9,3,"018B7DDE",292,1401,55,41,"","11100000","11100000","01010100"
OK

[00:01:22.220,520] <inf> mqtt_simple: Modem response / CGDCONT: +CGDCONT: 0,"IP","m2m.drei.at","10.71.192.243",0,0
OK

[00:01:22.221,099] <inf> mqtt_simple: Modem response / CEINFO: +CEINFO: 0,1,I,8,2,-86,16
OK

[00:01:22.221,405] <inf> mqtt_simple: getaddrinfo result: -2
[00:01:32.230,743] <inf> mqtt_simple: Modem response / monitor: %XMONITOR: 1,"3AT","3AT","23205","7615",9,3,"018B7DDE",292,1401,55,42,"","11100000","11100000","01010100"
OK

[00:01:32.231,292] <inf> mqtt_simple: Modem response / CGDCONT: +CGDCONT: 0,"IP","m2m.drei.at","10.71.192.243",0,0
OK

[00:01:32.231,872] <inf> mqtt_simple: Modem response / CEINFO: +CEINFO: 0,1,I,8,2,-86,17
OK

[00:01:32.232,238] <inf> mqtt_simple: getaddrinfo result: -2
[00:01:42.241,516] <inf> mqtt_simple: Modem response / monitor: %XMONITOR: 1,"3AT","3AT","23205","7615",9,3,"018B7DDE",292,1401,55,42,"","11100000","11100000","01010100"
OK

[00:01:42.242,095] <inf> mqtt_simple: Modem response / CGDCONT: +CGDCONT: 0,"IP","m2m.drei.at","10.71.192.243",0,0
OK

[00:01:42.242,614] <inf> mqtt_simple: Modem response / CEINFO: +CEINFO: 0,1,I,8,2,-86,17
OK

[00:01:42.242,980] <inf> mqtt_simple: getaddrinfo result: -2
[00:01:52.252,258] <inf> mqtt_simple: Modem response / monitor: %XMONITOR: 1,"3AT","3AT","23205","7615",9,3,"018B7DDE",292,1401,54,41,"","11100000","11100000","01010100"
OK

[00:01:52.252,838] <inf> mqtt_simple: Modem response / CGDCONT: +CGDCONT: 0,"IP","m2m.drei.at","10.71.192.243",0,0
OK

[00:01:52.253,570] <inf> mqtt_simple: Modem response / CEINFO: +CEINFO: 0,1,I,8,2,-87,16
OK

[00:01:52.253,906] <inf> mqtt_simple: getaddrinfo result: -2
[00:02:02.263,214] <inf> mqtt_simple: Modem response / monitor: %XMONITOR: 1,"3AT","3AT","23205","7615",9,3,"018B7DDE",292,1401,54,43,"","11100000","11100000","01010100"
OK

[00:02:02.263,824] <inf> mqtt_simple: Modem response / CGDCONT: +CGDCONT: 0,"IP","m2m.drei.at","10.71.192.243",0,0
OK

[00:02:02.264,373] <inf> mqtt_simple: Modem response / CEINFO: +CEINFO: 0,1,I,8,2,-87,18
OK

[00:02:02.264,739] <inf> mqtt_simple: getaddrinfo result: -2
[00:02:12.274,047] <inf> mqtt_simple: Modem response / monitor: %XMONITOR: 1,"3AT","3AT","23205","7615",9,3,"018B7DDE",292,1401,54,38,"","11100000","11100000","01010100"
OK

[00:02:12.274,597] <inf> mqtt_simple: Modem response / CGDCONT: +CGDCONT: 0,"IP","m2m.drei.at","10.71.192.243",0,0
OK

[00:02:12.275,146] <inf> mqtt_simple: Modem response / CEINFO: +CEINFO: 0,1,I,8,2,-87,13
OK

[00:02:12.275,512] <inf> mqtt_simple: getaddrinfo result: -2
[00:02:22.284,820] <inf> mqtt_simple: Modem response / monitor: %XMONITOR: 1,"3AT","3AT","23205","7615",9,3,"018B7DDE",292,1401,54,42,"","11100000","11100000","01010100"
OK

[00:02:22.285,369] <inf> mqtt_simple: Modem response / CGDCONT: +CGDCONT: 0,"IP","m2m.drei.at","10.71.192.243",0,0
OK

[00:02:22.285,919] <inf> mqtt_simple: Modem response / CEINFO: +CEINFO: 0,1,I,8,2,-87,17
OK

[00:02:22.286,285] <inf> mqtt_simple: getaddrinfo result: -2
[00:02:32.295,593] <inf> mqtt_simple: Modem response / monitor: %XMONITOR: 1,"3AT","3AT","23205","7615",9,3,"018B7DDE",292,1401,54,43,"","11100000","11100000","01010100"
OK

[00:02:32.296,142] <inf> mqtt_simple: Modem response / CGDCONT: +CGDCONT: 0,"IP","m2m.drei.at","10.71.192.243",0,0
OK

[00:02:32.296,722] <inf> mqtt_simple: Modem response / CEINFO: +CEINFO: 0,1,I,8,2,-87,18
OK

[00:02:32.297,058] <inf> mqtt_simple: getaddrinfo result: -2
[00:02:42.306,335] <inf> mqtt_simple: Modem response / monitor: %XMONITOR: 1,"3AT","3AT","23205","7615",9,3,"018B7DDE",292,1401,54,40,"","11100000","11100000","01010100"
OK

[00:02:42.306,915] <inf> mqtt_simple: Modem response / CGDCONT: +CGDCONT: 0,"IP","m2m.drei.at","10.71.192.243",0,0
OK

[00:02:42.307,464] <inf> mqtt_simple: Modem response / CEINFO: +CEINFO: 0,1,I,8,2,-87,15
OK

[00:02:42.307,800] <inf> mqtt_simple: getaddrinfo result: -2
[00:02:52.317,047] <inf> mqtt_simple: Modem response / monitor: %XMONITOR: 1,"3AT","3AT","23205","7615",9,3,"018B7DDE",292,1401,54,39,"","11100000","11100000","01010100"
OK

[00:02:52.317,626] <inf> mqtt_simple: Modem response / CGDCONT: +CGDCONT: 0,"IP","m2m.drei.at","10.71.192.243",0,0
OK

[00:02:52.318,145] <inf> mqtt_simple: Modem response / CEINFO: +CEINFO: 0,1,I,8,2,-87,14
OK

[00:02:52.318,511] <inf> mqtt_simple: getaddrinfo result: -2
[00:03:02.327,789] <inf> mqtt_simple: Modem response / monitor: %XMONITOR: 1,"3AT","3AT","23205","7615",9,3,"018B7DDE",292,1401,54,39,"","11100000","11100000","01010100"
OK

[00:03:02.328,338] <inf> mqtt_simple: Modem response / CGDCONT: +CGDCONT: 0,"IP","m2m.drei.at","10.71.192.243",0,0
OK

[00:03:02.328,887] <inf> mqtt_simple: Modem response / CEINFO: +CEINFO: 0,1,I,8,2,-87,14
OK

[00:03:02.329,254] <inf> mqtt_simple: getaddrinfo result: -2
[00:03:12.330,261] <inf> mqtt_simple: Modem response / monitor: %XMONITOR: 1,"3AT","3AT","23205","7615",9,3,"018B7DDE",292,1401,54,39,"","11100000","11100000","01010100"
OK

[00:03:12.330,841] <inf> mqtt_simple: Modem response / CGDCONT: +CGDCONT: 0,"IP","m2m.drei.at","10.71.192.243",0,0
OK

[00:03:12.331,420] <inf> mqtt_simple: Modem response / CEINFO: +CEINFO: 0,1,I,8,2,-87,14
OK

[00:03:12.331,756] <inf> mqtt_simple: getaddrinfo result: -2
[00:03:22.341,094] <inf> mqtt_simple: Modem response / monitor: %XMONITOR: 1,"3AT","3AT","23205","7615",9,3,"018B7DDE",292,1401,54,42,"","11100000","11100000","01010100"
OK

[00:03:22.341,644] <inf> mqtt_simple: Modem response / CGDCONT: +CGDCONT: 0,"IP","m2m.drei.at","10.71.192.243",0,0
OK

[00:03:22.342,376] <inf> mqtt_simple: Modem response / CEINFO: +CEINFO: 0,1,I,8,2,-87,17
OK

[00:03:22.342,712] <inf> mqtt_simple: getaddrinfo result: -2
[00:03:32.352,050] <inf> mqtt_simple: Modem response / monitor: %XMONITOR: 1,"3AT","3AT","23205","7615",9,3,"018B7DDE",292,1401,55,43,"","11100000","11100000","01010100"
OK

[00:03:32.352,600] <inf> mqtt_simple: Modem response / CGDCONT: +CGDCONT: 0,"IP","m2m.drei.at","10.71.192.243",0,0
OK

[00:03:32.353,179] <inf> mqtt_simple: Modem response / CEINFO: +CEINFO: 0,1,I,8,2,-86,18
OK

[00:03:32.353,546] <inf> mqtt_simple: getaddrinfo result: -2
[00:03:42.362,823] <inf> mqtt_simple: Modem response / monitor: %XMONITOR: 1,"3AT","3AT","23205","7615",9,3,"018B7DDE",292,1401,55,39,"","11100000","11100000","01010100"
OK

[00:03:42.363,403] <inf> mqtt_simple: Modem response / CGDCONT: +CGDCONT: 0,"IP","m2m.drei.at","10.71.192.243",0,0
OK

[00:03:42.363,922] <inf> mqtt_simple: Modem response / CEINFO: +CEINFO: 0,1,I,8,2,-86,14
OK

[00:03:42.364,288] <inf> mqtt_simple: getaddrinfo result: -2
[00:03:52.373,565] <inf> mqtt_simple: Modem response / monitor: %XMONITOR: 1,"3AT","3AT","23205","7615",9,3,"018B7DDE",292,1401,55,40,"","11100000","11100000","01010100"
OK

[00:03:52.374,145] <inf> mqtt_simple: Modem response / CGDCONT: +CGDCONT: 0,"IP","m2m.drei.at","10.71.192.243",0,0
OK

[00:03:52.374,877] <inf> mqtt_simple: Modem response / CEINFO: +CEINFO: 0,1,I,8,2,-86,15
OK

[00:03:52.375,213] <inf> mqtt_simple: getaddrinfo result: -2
[00:04:02.384,521] <inf> mqtt_simple: Modem response / monitor: %XMONITOR: 1,"3AT","3AT","23205","7615",9,3,"018B7DDE",292,1401,55,40,"","11100000","11100000","01010100"
OK

[00:04:02.385,131] <inf> mqtt_simple: Modem response / CGDCONT: +CGDCONT: 0,"IP","m2m.drei.at","10.71.192.243",0,0
OK

[00:04:02.385,681] <inf> mqtt_simple: Modem response / CEINFO: +CEINFO: 0,1,I,8,2,-86,15
OK

[00:04:02.386,047] <inf> mqtt_simple: getaddrinfo result: -2
[00:04:12.395,355] <inf> mqtt_simple: Modem response / monitor: %XMONITOR: 1,"3AT","3AT","23205","7615",9,3,"018B7DDE",292,1401,55,38,"","11100000","11100000","01010100"
OK

[00:04:12.395,904] <inf> mqtt_simple: Modem response / CGDCONT: +CGDCONT: 0,"IP","m2m.drei.at","10.71.192.243",0,0
OK

[00:04:12.396,453] <inf> mqtt_simple: Modem response / CEINFO: +CEINFO: 0,1,I,8,2,-86,13
OK

[00:04:12.396,820] <inf> mqtt_simple: getaddrinfo result: -2
[00:04:22.406,127] <inf> mqtt_simple: Modem response / monitor: %XMONITOR: 1,"3AT","3AT","23205","7615",9,3,"018B7DDE",292,1401,54,39,"","11100000","11100000","01010100"
OK

[00:04:22.406,677] <inf> mqtt_simple: Modem response / CGDCONT: +CGDCONT: 0,"IP","m2m.drei.at","10.71.192.243",0,0
OK

[00:04:22.407,409] <inf> mqtt_simple: Modem response / CEINFO: +CEINFO: 0,1,I,8,2,-87,14
OK

[00:04:22.407,745] <inf> mqtt_simple: getaddrinfo result: -2
[00:04:32.417,083] <inf> mqtt_simple: Modem response / monitor: %XMONITOR: 1,"3AT","3AT","23205","7615",9,3,"018B7DDE",292,1401,54,42,"","11100000","11100000","01010100"
OK

[00:04:32.417,633] <inf> mqtt_simple: Modem response / CGDCONT: +CGDCONT: 0,"IP","m2m.drei.at","10.71.192.243",0,0
OK

[00:04:32.418,182] <inf> mqtt_simple: Modem response / CEINFO: +CEINFO: 0,1,I,8,2,-87,17
OK

[00:04:32.418,548] <inf> mqtt_simple: getaddrinfo result: -2
[00:04:42.427,795] <inf> mqtt_simple: Modem response / monitor: %XMONITOR: 1,"3AT","3AT","23205","7615",9,3,"018B7DDE",292,1401,54,40,"","11100000","11100000","01010100"
OK

[00:04:42.428,375] <inf> mqtt_simple: Modem response / CGDCONT: +CGDCONT: 0,"IP","m2m.drei.at","10.71.192.243",0,0
OK

[00:04:42.428,924] <inf> mqtt_simple: Modem response / CEINFO: +CEINFO: 0,1,I,8,2,-87,15
OK

[00:04:42.429,260] <inf> mqtt_simple: getaddrinfo result: -2
[00:04:52.438,507] <inf> mqtt_simple: Modem response / monitor: %XMONITOR: 1,"3AT","3AT","23205","7615",9,3,"018B7DDE",292,1401,54,39,"","11100000","11100000","01010100"
OK

[00:04:52.439,086] <inf> mqtt_simple: Modem response / CGDCONT: +CGDCONT: 0,"IP","m2m.drei.at","10.71.192.243",0,0
OK

[00:04:52.439,605] <inf> mqtt_simple: Modem response / CEINFO: +CEINFO: 0,1,I,8,2,-87,14
OK

[00:04:52.439,971] <inf> mqtt_simple: getaddrinfo result: -2
[00:05:02.440,979] <inf> mqtt_simple: Modem response / monitor: %XMONITOR: 1,"3AT","3AT","23205","7615",9,3,"018B7DDE",292,1401,54,40,"","11100000","11100000","01010100"
OK

[00:05:02.441,558] <inf> mqtt_simple: Modem response / CGDCONT: +CGDCONT: 0,"IP","m2m.drei.at","10.71.192.243",0,0
OK

[00:05:02.442,138] <inf> mqtt_simple: Modem response / CEINFO: +CEINFO: 0,1,I,8,2,-87,15
OK

[00:05:02.442,474] <inf> mqtt_simple: getaddrinfo result: -2
[00:05:12.451,812] <inf> mqtt_simple: Modem response / monitor: %XMONITOR: 1,"3AT","3AT","23205","7615",9,3,"018B7DDE",292,1401,54,40,"","11100000","11100000","01010100"
OK

[00:05:12.452,362] <inf> mqtt_simple: Modem response / CGDCONT: +CGDCONT: 0,"IP","m2m.drei.at","10.71.192.243",0,0
OK

[00:05:12.452,911] <inf> mqtt_simple: Modem response / CEINFO: +CEINFO: 0,1,I,8,2,-87,15
OK

[00:05:12.453,277] <inf> mqtt_simple: getaddrinfo result: -2
[00:05:22.462,585] <inf> mqtt_simple: Modem response / monitor: %XMONITOR: 1,"3AT","3AT","23205","7615",9,3,"018B7DDE",292,1401,55,39,"","11100000","11100000","01010100"
OK

[00:05:22.463,134] <inf> mqtt_simple: Modem response / CGDCONT: +CGDCONT: 0,"IP","m2m.drei.at","10.71.192.243",0,0
OK

[00:05:22.463,684] <inf> mqtt_simple: Modem response / CEINFO: +CEINFO: 0,1,I,8,2,-86,14
OK

[00:05:22.464,050] <inf> mqtt_simple: getaddrinfo result: -2
[00:05:32.473,358] <inf> mqtt_simple: Modem response / monitor: %XMONITOR: 1,"3AT","3AT","23205","7615",9,3,"018B7DDE",292,1401,55,40,"","11100000","11100000","01010100"
OK

[00:05:32.473,907] <inf> mqtt_simple: Modem response / CGDCONT: +CGDCONT: 0,"IP","m2m.drei.at","10.71.192.243",0,0
OK

[00:05:32.474,487] <inf> mqtt_simple: Modem response / CEINFO: +CEINFO: 0,1,I,8,2,-86,15
OK

[00:05:32.474,853] <inf> mqtt_simple: getaddrinfo result: -2
[00:05:42.484,130] <inf> mqtt_simple: Modem response / monitor: %XMONITOR: 1,"3AT","3AT","23205","7615",9,3,"018B7DDE",292,1401,54,40,"","11100000","11100000","01010100"
OK

[00:05:42.484,710] <inf> mqtt_simple: Modem response / CGDCONT: +CGDCONT: 0,"IP","m2m.drei.at","10.71.192.243",0,0
OK

[00:05:42.485,229] <inf> mqtt_simple: Modem response / CEINFO: +CEINFO: 0,1,I,8,2,-87,15
OK

[00:05:42.485,595] <inf> mqtt_simple: getaddrinfo result: -2
[00:05:52.494,873] <inf> mqtt_simple: Modem response / monitor: %XMONITOR: 1,"3AT","3AT","23205","7615",9,3,"018B7DDE",292,1401,55,41,"","11100000","11100000","01010100"
OK

[00:05:52.495,452] <inf> mqtt_simple: Modem response / CGDCONT: +CGDCONT: 0,"IP","m2m.drei.at","10.71.192.243",0,0
OK

[00:05:52.496,185] <inf> mqtt_simple: Modem response / CEINFO: +CEINFO: 0,1,I,8,2,-86,16
OK

[00:05:52.496,520] <inf> mqtt_simple: getaddrinfo result: -2
[00:06:02.505,828] <inf> mqtt_simple: Modem response / monitor: %XMONITOR: 1,"3AT","3AT","23205","7615",9,3,"018B7DDE",292,1401,54,40,"","11100000","11100000","01010100"
OK

[00:06:02.506,439] <inf> mqtt_simple: Modem response / CGDCONT: +CGDCONT: 0,"IP","m2m.drei.at","10.71.192.243",0,0
OK

[00:06:02.506,988] <inf> mqtt_simple: Modem response / CEINFO: +CEINFO: 0,1,I,8,2,-87,15
OK

[00:06:02.507,354] <inf> mqtt_simple: getaddrinfo result: -2
[00:06:12.516,662] <inf> mqtt_simple: Modem response / monitor: %XMONITOR: 1,"3AT","3AT","23205","7615",9,3,"018B7DDE",292,1401,54,40,"","11100000","11100000","01010100"
OK

[00:06:12.517,211] <inf> mqtt_simple: Modem response / CGDCONT: +CGDCONT: 0,"IP","m2m.drei.at","10.71.192.243",0,0
OK

[00:06:12.517,944] <inf> mqtt_simple: Modem response / CEINFO: +CEINFO: 0,1,I,8,2,-87,15
OK

[00:06:12.518,280] <inf> mqtt_simple: getaddrinfo result: -2
[00:06:22.527,618] <inf> mqtt_simple: Modem response / monitor: %XMONITOR: 1,"3AT","3AT","23205","7615",9,3,"018B7DDE",292,1401,54,40,"","11100000","11100000","01010100"
OK

[00:06:22.528,167] <inf> mqtt_simple: Modem response / CGDCONT: +CGDCONT: 0,"IP","m2m.drei.at","10.71.192.243",0,0
OK

[00:06:22.528,717] <inf> mqtt_simple: Modem response / CEINFO: +CEINFO: 0,1,I,8,2,-87,15
OK

[00:06:22.529,083] <inf> mqtt_simple: getaddrinfo result: -2
[00:06:32.538,391] <inf> mqtt_simple: Modem response / monitor: %XMONITOR: 1,"3AT","3AT","23205","7615",9,3,"018B7DDE",292,1401,54,41,"","11100000","11100000","01010100"
OK

[00:06:32.538,940] <inf> mqtt_simple: Modem response / CGDCONT: +CGDCONT: 0,"IP","m2m.drei.at","10.71.192.243",0,0
OK

[00:06:32.539,489] <inf> mqtt_simple: Modem response / CEINFO: +CEINFO: 0,1,I,8,2,-87,16
OK

[00:06:32.539,855] <inf> mqtt_simple: getaddrinfo result: -2
[00:06:42.549,102] <inf> mqtt_simple: Modem response / monitor: %XMONITOR: 1,"3AT","3AT","23205","7615",9,3,"018B7DDE",292,1401,54,39,"","11100000","11100000","01010100"
OK

[00:06:42.549,682] <inf> mqtt_simple: Modem response / CGDCONT: +CGDCONT: 0,"IP","m2m.drei.at","10.71.192.243",0,0
OK

[00:06:42.550,415] <inf> mqtt_simple: Modem response / CEINFO: +CEINFO: 0,1,I,8,2,-87,14
OK

[00:06:42.550,750] <inf> mqtt_simple: getaddrinfo result: -2
[00:06:52.551,788] <inf> mqtt_simple: Modem response / monitor: %XMONITOR: 1,"3AT","3AT","23205","7615",9,3,"018B7DDE",292,1401,54,39,"","11100000","11100000","01010100"
OK

[00:06:52.552,337] <inf> mqtt_simple: Modem response / CGDCONT: +CGDCONT: 0,"IP","m2m.drei.at","10.71.192.243",0,0
OK

[00:06:52.552,947] <inf> mqtt_simple: Modem response / CEINFO: +CEINFO: 0,1,I,8,2,-87,14
OK

[00:06:52.553,283] <inf> mqtt_simple: getaddrinfo result: -2
[00:07:02.562,591] <inf> mqtt_simple: Modem response / monitor: %XMONITOR: 1,"3AT","3AT","23205","7615",9,3,"018B7DDE",292,1401,54,41,"","11100000","11100000","01010100"
OK

[00:07:02.563,201] <inf> mqtt_simple: Modem response / CGDCONT: +CGDCONT: 0,"IP","m2m.drei.at","10.71.192.243",0,0
OK

[00:07:02.563,751] <inf> mqtt_simple: Modem response / CEINFO: +CEINFO: 0,1,I,8,2,-87,16
OK

[00:07:02.564,117] <inf> mqtt_simple: getaddrinfo result: -2
[00:07:12.573,425] <inf> mqtt_simple: Modem response / monitor: %XMONITOR: 1,"3AT","3AT","23205","7615",9,3,"018B7DDE",292,1401,54,41,"","11100000","11100000","01010100"
OK

[00:07:12.573,974] <inf> mqtt_simple: Modem response / CGDCONT: +CGDCONT: 0,"IP","m2m.drei.at","10.71.192.243",0,0
OK

[00:07:12.574,523] <inf> mqtt_simple: Modem response / CEINFO: +CEINFO: 0,1,I,8,2,-87,16
OK

[00:07:12.574,890] <inf> mqtt_simple: getaddrinfo result: -2
[00:07:22.584,197] <inf> mqtt_simple: Modem response / monitor: %XMONITOR: 1,"3AT","3AT","23205","7615",9,3,"018B7DDE",292,1401,54,40,"","11100000","11100000","01010100"
OK

[00:07:22.584,747] <inf> mqtt_simple: Modem response / CGDCONT: +CGDCONT: 0,"IP","m2m.drei.at","10.71.192.243",0,0
OK

[00:07:22.585,479] <inf> mqtt_simple: Modem response / CEINFO: +CEINFO: 0,1,I,8,2,-87,15
OK

[00:07:22.585,815] <inf> mqtt_simple: getaddrinfo result: -2
[00:07:32.595,153] <inf> mqtt_simple: Modem response / monitor: %XMONITOR: 1,"3AT","3AT","23205","7615",9,3,"018B7DDE",292,1401,54,41,"","11100000","11100000","01010100"
OK

[00:07:32.595,733] <inf> mqtt_simple: Modem response / CGDCONT: +CGDCONT: 0,"IP","m2m.drei.at","10.71.192.243",0,0
OK

[00:07:32.596,282] <inf> mqtt_simple: Modem response / CEINFO: +CEINFO: 0,1,I,8,2,-87,16
OK

[00:07:32.596,649] <inf> mqtt_simple: getaddrinfo result: -2
[00:07:42.605,926] <inf> mqtt_simple: Modem response / monitor: %XMONITOR: 1,"3AT","3AT","23205","7615",9,3,"018B7DDE",292,1401,55,41,"","11100000","11100000","01010100"
OK

[00:07:42.606,506] <inf> mqtt_simple: Modem response / CGDCONT: +CGDCONT: 0,"IP","m2m.drei.at","10.71.192.243",0,0
OK

[00:07:42.607,025] <inf> mqtt_simple: Modem response / CEINFO: +CEINFO: 0,1,I,8,2,-86,16
OK

[00:07:42.607,391] <inf> mqtt_simple: getaddrinfo result: -2
[00:07:52.616,668] <inf> mqtt_simple: Modem response / monitor: %XMONITOR: 1,"3AT","3AT","23205","7615",9,3,"018B7DDE",292,1401,54,40,"","11100000","11100000","01010100"
OK

[00:07:52.617,248] <inf> mqtt_simple: Modem response / CGDCONT: +CGDCONT: 0,"IP","m2m.drei.at","10.71.192.243",0,0
OK

[00:07:52.617,980] <inf> mqtt_simple: Modem response / CEINFO: +CEINFO: 0,1,I,8,2,-87,15
OK

[00:07:52.618,316] <inf> mqtt_simple: getaddrinfo result: -2
[00:08:02.627,624] <inf> mqtt_simple: Modem response / monitor: %XMONITOR: 1,"3AT","3AT","23205","7615",9,3,"018B7DDE",292,1401,54,40,"","11100000","11100000","01010100"
OK

[00:08:02.628,234] <inf> mqtt_simple: Modem response / CGDCONT: +CGDCONT: 0,"IP","m2m.drei.at","10.71.192.243",0,0
OK

[00:08:02.628,784] <inf> mqtt_simple: Modem response / CEINFO: +CEINFO: 0,1,I,8,2,-87,15
OK

[00:08:02.629,150] <inf> mqtt_simple: getaddrinfo result: -2
[00:08:12.638,458] <inf> mqtt_simple: Modem response / monitor: %XMONITOR: 1,"3AT","3AT","23205","7615",9,3,"018B7DDE",292,1401,54,40,"","11100000","11100000","01010100"
OK

[00:08:12.639,007] <inf> mqtt_simple: Modem response / CGDCONT: +CGDCONT: 0,"IP","m2m.drei.at","10.71.192.243",0,0
OK

[00:08:12.639,739] <inf> mqtt_simple: Modem response / CEINFO: +CEINFO: 0,1,I,8,2,-87,15
OK

[00:08:12.640,075] <inf> mqtt_simple: getaddrinfo result: -2
[00:08:22.649,414] <inf> mqtt_simple: Modem response / monitor: %XMONITOR: 1,"3AT","3AT","23205","7615",9,3,"018B7DDE",292,1401,55,42,"","11100000","11100000","01010100"
OK

[00:08:22.649,963] <inf> mqtt_simple: Modem response / CGDCONT: +CGDCONT: 0,"IP","m2m.drei.at","10.71.192.243",0,0
OK

[00:08:22.650,512] <inf> mqtt_simple: Modem response / CEINFO: +CEINFO: 0,1,I,8,2,-86,17
OK

[00:08:22.650,878] <inf> mqtt_simple: getaddrinfo result: -2
[00:08:32.660,156] <inf> mqtt_simple: Modem response / monitor: %XMONITOR: 1,"3AT","3AT","23205","7615",9,3,"018B7DDE",292,1401,54,43,"","11100000","11100000","01010100"
OK

[00:08:32.660,705] <inf> mqtt_simple: Modem response / CGDCONT: +CGDCONT: 0,"IP","m2m.drei.at","10.71.192.243",0,0
OK

[00:08:32.661,285] <inf> mqtt_simple: Modem response / CEINFO: +CEINFO: 0,1,I,8,2,-87,18
OK

[00:08:32.661,621] <inf> mqtt_simple: getaddrinfo result: -2
[00:08:42.662,597] <inf> mqtt_simple: Modem response / monitor: %XMONITOR: 1,"3AT","3AT","23205","7615",9,3,"018B7DDE",292,1401,55,40,"","11100000","11100000","01010100"
OK

[00:08:42.663,177] <inf> mqtt_simple: Modem response / CGDCONT: +CGDCONT: 0,"IP","m2m.drei.at","10.71.192.243",0,0
OK

[00:08:42.663,757] <inf> mqtt_simple: Modem response / CEINFO: +CEINFO: 0,1,I,8,2,-86,15
OK

[00:08:42.664,093] <inf> mqtt_simple: getaddrinfo result: -2
[00:08:52.673,370] <inf> mqtt_simple: Modem response / monitor: %XMONITOR: 1,"3AT","3AT","23205","7615",9,3,"018B7DDE",292,1401,55,42,"","11100000","11100000","01010100"
OK

[00:08:52.673,950] <inf> mqtt_simple: Modem response / CGDCONT: +CGDCONT: 0,"IP","m2m.drei.at","10.71.192.243",0,0
OK

[00:08:52.674,499] <inf> mqtt_simple: Modem response / CEINFO: +CEINFO: 0,1,I,8,2,-86,17
OK

[00:08:52.674,865] <inf> mqtt_simple: getaddrinfo result: -2
[00:09:02.684,143] <inf> mqtt_simple: Modem response / monitor: %XMONITOR: 1,"3AT","3AT","23205","7615",9,3,"018B7DDE",292,1401,55,43,"","11100000","11100000","01010100"
OK

[00:09:02.684,753] <inf> mqtt_simple: Modem response / CGDCONT: +CGDCONT: 0,"IP","m2m.drei.at","10.71.192.243",0,0
OK

[00:09:02.685,302] <inf> mqtt_simple: Modem response / CEINFO: +CEINFO: 0,1,I,8,2,-86,18
OK

[00:09:02.685,668] <inf> mqtt_simple: getaddrinfo result: -2
[00:09:12.694,976] <inf> mqtt_simple: Modem response / monitor: %XMONITOR: 1,"3AT","3AT","23205","7615",9,3,"018B7DDE",292,1401,55,44,"","11100000","11100000","01010100"
OK

[00:09:12.695,526] <inf> mqtt_simple: Modem response / CGDCONT: +CGDCONT: 0,"IP","m2m.drei.at","10.71.192.243",0,0
OK

[00:09:12.696,075] <inf> mqtt_simple: Modem response / CEINFO: +CEINFO: 0,1,I,8,2,-86,19
OK

[00:09:12.696,441] <inf> mqtt_simple: getaddrinfo result: -2
[00:09:22.705,749] <inf> mqtt_simple: Modem response / monitor: %XMONITOR: 1,"3AT","3AT","23205","7615",9,3,"018B7DDE",292,1401,55,44,"","11100000","11100000","01010100"
OK

[00:09:22.706,298] <inf> mqtt_simple: Modem response / CGDCONT: +CGDCONT: 0,"IP","m2m.drei.at","10.71.192.243",0,0
OK

[00:09:22.706,848] <inf> mqtt_simple: Modem response / CEINFO: +CEINFO: 0,1,I,8,2,-86,19
OK

[00:09:22.707,214] <inf> mqtt_simple: getaddrinfo result: -2
[00:09:32.716,522] <inf> mqtt_simple: Modem response / monitor: %XMONITOR: 1,"3AT","3AT","23205","7615",9,3,"018B7DDE",292,1401,55,41,"","11100000","11100000","01010100"
OK

[00:09:32.717,071] <inf> mqtt_simple: Modem response / CGDCONT: +CGDCONT: 0,"IP","m2m.drei.at","10.71.192.243",0,0
OK

[00:09:32.717,651] <inf> mqtt_simple: Modem response / CEINFO: +CEINFO: 0,1,I,8,2,-86,16
OK

[00:09:32.718,017] <inf> mqtt_simple: getaddrinfo result: -2
[00:09:42.727,294] <inf> mqtt_simple: Modem response / monitor: %XMONITOR: 1,"3AT","3AT","23205","7615",9,3,"018B7DDE",292,1401,54,42,"","11100000","11100000","01010100"
OK

[00:09:42.727,874] <inf> mqtt_simple: Modem response / CGDCONT: +CGDCONT: 0,"IP","m2m.drei.at","10.71.192.243",0,0
OK

[00:09:42.728,393] <inf> mqtt_simple: Modem response / CEINFO: +CEINFO: 0,1,I,8,2,-87,17
OK

[00:09:42.728,759] <inf> mqtt_simple: getaddrinfo result: -2
[00:09:52.738,037] <inf> mqtt_simple: Modem response / monitor: %XMONITOR: 1,"3AT","3AT","23205","7615",9,3,"018B7DDE",292,1401,54,42,"","11100000","11100000","01010100"
OK

[00:09:52.738,616] <inf> mqtt_simple: Modem response / CGDCONT: +CGDCONT: 0,"IP","m2m.drei.at","10.71.192.243",0,0
OK

[00:09:52.739,349] <inf> mqtt_simple: Modem response / CEINFO: +CEINFO: 0,1,I,8,2,-87,17
OK

[00:09:52.739,685] <inf> mqtt_simple: getaddrinfo result: -2
[00:10:02.749,023] <inf> mqtt_simple: Modem response / monitor: %XMONITOR: 1,"3AT","3AT","23205","7615",9,3,"018B7DDE",292,1401,54,39,"","11100000","11100000","01010100"
OK

[00:10:02.749,572] <inf> mqtt_simple: Modem response / CGDCONT: +CGDCONT: 0,"IP","m2m.drei.at","10.71.192.243",0,0
OK

[00:10:02.750,122] <inf> mqtt_simple: Modem response / CEINFO: +CEINFO: 0,1,I,8,2,-87,14
OK

[00:10:02.750,488] <inf> mqtt_simple: getaddrinfo result: -2
[00:10:12.750,579] <err> mqtt_simple: getaddrinfo failed: -2
[00:10:12.750,610] <err> mqtt_simple: Failed to initialize broker connection
[00:10:12.750,640] <err> mqtt_simple: client_init: -10
uart:~$

I will do the same with the devkit, but the trace is not getting logged at the moment. I will upload as soon as it works...

[Achim Kraus]

Hm, that log shows, that the device ip-address is stable and the signal conditions are well.

Really mystic. Once you have the capture with the DNS requests, it will be very interesting to see, what that shows (FMPOV, only the one of the trace collector preview is required).

[tomtomtom2401]

The problem for the trace was: I adapted the boardfile for UART1 (trace output) for our board just for fast tests and haven't added a new custom board. So here is the trace output incl. a mqtt test message:

mqtt_simple_dns_request_redo_devkit.bin

mqtt_simple_dns_request_redo_devkit.pcapng

For my (not that high experienced) eyes: we see some DNS requests with a source and a destination, and a response from this DNS server (213.94.78.16). But from where does the device know this DNS server?

Btw.: can the board definition cause any problem in this case regarding the DNS/address resolution? Our hardware is basically the devkit but with minor changes to the GPIOs and the debugger part has been removed - HF part, etc. is the same...

And the hardware revision is different from the devkit and nowhere mentioned: BQA vs. B1A

BR Thomas

[Achim Kraus]

> nslookup 213.94.78.16

> 16.78.94.213.in-addr.arpa    name = pdnsvip1.drei.com.

Looks like the DNS of your provider.

> But from where does the device know this DNS server?

Maybe AT+CGCONTRDP=0 helps to see, if that is assigned to the device by your provider.

[Achim Kraus]

I don't think, this is related to the modem hardware revision, and the issue is even with the "current modem hw release".

> Our hardware is basically the devkit but with minor changes to the GPIOs and the debugger part has been removed - HF part, etc. is the same...

> (small ext. antenna, ~ -90dBm to ~ -100dBm).

FMPOV, the ext. antenna belongs to the "HF part" and is changed.

Some experts told me, that for the most antennas, you need a matching ground-plane. Not sure, if that applies for your antenna. Also not sure, what the "signal strength" value really refer to.

I'm still not clear, why the capture "trace_with_dns.bin" contains the changing ip-addresses, but your log trace_with_dns.bin the ip-address is stable.

Anyway, once you have some trace of your dev, without "nrf_setdnsaddr", it will be very interesting, what that shows.

[Achim Kraus]

And maybe you check, if the SIM card is connected proper, not that the connection to the SIM card is instable.

I would guess, that this is all in the part of the trace, which is not included in the wireshark capture. So that may require the analysis of Nordic modem's experts.

[tomtomtom2401]

> FMPOV, the ext. antenna belongs to the "HF part" and is changed.

> Some experts told me, that for the most antennas, you need a matching ground-plane. Not sure, if that applies for your antenna. Also not sure, what the "signal strength" value really refer to.

Thats right, but 50 Ohm matching, single ended, and so on, HF part is working in my opinion (tested fine with IP address of the broker and the CoAP server, signal levels, ...). What I wanted to say is, that there is no circuit with COEX pins controlling an external RF switch for antenna matching which will require some software modifications to the basic sample (like on the Thingy:91).

> I'm still not clear, why the capture "trace_with_dns.bin" contains the changing ip-addresses, but your log trace_with_dns.bin the ip-address is stable.

You linked the same two files ;)

For the new trace from the devkit, please see the mqtt_simple_dns_request_redo_devkit.pcapng (or the bin file) from two posts above.
The trace_with_dns.bin is with the nrf_setdnsaddr, on the "redo" traces it is without setting the secondary dns. I will try to set it manually to the DNS server from drei and do the retries.

> I would guess, that this is all in the part of the trace, which is not included in the wireshark capture. So that may require the analysis of Nordic modem's experts.

I hope someone can check it - but as we sadly see, there is not that much response from their side...

BR Thomas

[Achim Kraus]

> You linked the same two files ;)

Yes, the 2. one should be mqtt_simple_dns_request_redo.bin

> from their side...

Maybe because it's also still wired.

I would try to make captures from the real device (though the devkit doesn't show the issue), without calling nrf_setdnsaddr, but reset the config to factory, and let that run for a while.