nrf9160 getaddrinfo() return error -11

RE: nrf9160 getaddrinfo() return error -11

Jared — Mon, 03 May 2021 16:21:48 GMT

I'll add to this if you are using the aws_fota or other examples that require you to set the address, make sure you set it! You will get this error if your example/code is pointing to a bogus address.

RE: nrf9160 getaddrinfo() return error -11

frax84 — Mon, 31 Aug 2020 09:47:43 GMT

Hi JDoc,

sorry for the delay in answer but i was still on vacation. Before anything else, i want to share with you this post:

https://devzone.nordicsemi.com/f/nordic-q-a/61822/nrf9160-fails-to-connect-to-nb-iot

This is the continuation of the post we're writing on right now. In that post you will receive further indications about how to solve your issue with error -11. Actually the post linked represents the method that really solved my problems so i suggest you to read it.

By the way, returning to what you asked me, as you probably well know, many configuration parameters need to be set on the configuration file of the project depending on the features needed to work on the project itself (es. NB-IoT? LTE-M? DNS? IP?). The file i'm speaking about is "prj.conf".

I don't know which features you need in your project and i would like to avoid to confuse you, so i prefer to not share my prf.conf file settings. By the way, if you still don't find any solution after this post, i can share it.

Regards,

Frax

RE: nrf9160 getaddrinfo() return error -11

JDoc — Fri, 28 Aug 2020 01:37:48 GMT

[quote userid="86927" url="~/f/nordic-q-a/60825/nrf9160-getaddrinfo-return-error--11/247492"]Please remember to set properly .config file[/quote]

Can you please explain what you mean @frax84? I have used this code but I am still getting a "error -11" on getaddrinfo

RE: nrf9160 getaddrinfo() return error -11

frax84 — Thu, 30 Apr 2020 09:58:28 GMT

[quote userid="2115" url="~/f/nordic-q-a/60825/nrf9160-getaddrinfo-return-error--11/247455"]It could be, but what has changed since the last time it was working?[/quote]

Absolutely nothing, at least from the development code point of view. I even used a working code backup from my github to be sure to have not messed up my code, but nothing changed. From the network side, unfortunately i didn't saved the details about the network, so i'm not sure if i'm connecting on the same network as the previous 2 (working) months. Of course this could be a good point. If i'm connected on a different network this one could not provide DNS service. I'll take note of the full CEREG string from now on.

[quote userid="2115" url="~/f/nordic-q-a/60825/nrf9160-getaddrinfo-return-error--11/247455"]Now you are on NB1, were you always on NB1, or has it recently done the switch from LTE M1 to NB1?[/quote]

I'm in Rome, Italy. As far as i know in Italy we have no national LTE-M network deployed. The biggest providers (Vodafone and TIM [Telecom Italia Mobile]) deployed national NB-IoT coverage, so yes, i have always been on NB1 (9 on CEREG).

[quote userid="2115" url="~/f/nordic-q-a/60825/nrf9160-getaddrinfo-return-error--11/247390"]This is very common error to see if your local carrier does not provide DNS servers. You could try setting it manually, as shown here, and see if that works?[/quote]

I'm happy to say that, with manual DNS setup, it works!

For people who could occur in the same problem i did, this is the function i used:

static void modem_configure(void)
{
  if (IS_ENABLED(CONFIG_LTE_AUTO_INIT_AND_CONNECT)) {
    /* Do nothing, modem is already turned on
    * and connected.
    */
  } else {
    //Set manually DNS server
    struct nrf_in_addr dns;
    dns.s_addr = 134744072; // Google DNS, 8.8.8.8 in u32 rapresentation
    int err = nrf_setdnsaddr(2, &dns);
    if (err ==0) {
      printk("DNS correctly set\n");
    } else {
      printk("Error %d, DNS not set\n", err);
    }
    
    //Init network connection
    printk("LTE Link Connecting ...\n");
    err = lte_lc_init_and_connect();
    __ASSERT(err == 0, "LTE link could not be established.");
    printk("LTE Link Connected!\n");
    }
}

Please remember to set properly .config file

Thanks for the nice and fast support!

Frax

RE: nrf9160 getaddrinfo() return error -11

Håkon Alseth — Thu, 30 Apr 2020 07:18:15 GMT

Hi,

[quote user="frax84"]Could it be a temporary network provider issue?[/quote]

It could be, but what has changed since the last time it was working?

Now you are on NB1, were you always on NB1, or has it recently done the switch from LTE M1 to NB1?

Is there anything out-of-the-ordinary (or different from a previous working situation) if you run at_client? Is it still connecting to the same provider?

Kind regards,

Håkon

RE: nrf9160 getaddrinfo() return error -11

frax84 — Wed, 29 Apr 2020 15:14:16 GMT

Hi, i'm going to try as soon as possible (within tomorrow probably) and provide you a feedback. By the way, i want to underline that the same code never had this problems in the last two months. I always have been able to communicate with my (or any other) server. It's just the last two days i'm not able anymore.

Could it be a temporary network provider issue?

RE: nrf9160 getaddrinfo() return error -11

Håkon Alseth — Wed, 29 Apr 2020 14:42:12 GMT

Hi,

This is very common error to see if your local carrier does not provide DNS servers. You could try setting it manually, as shown here, and see if that works?

https://devzone.nordicsemi.com/f/nordic-q-a/50029/nrf9160-modem-firmware-v1-0-0-setting-custom-dns-server/235419#235419

Kind regards,

Håkon

RE: nrf9160 getaddrinfo() return error -11

frax84 — Wed, 29 Apr 2020 13:42:44 GMT

No,

exactly the same problem occurs. This is the serial output of the mqtt_simple example:

*** Booting Zephyr OS build v2.1.99-ncs1-4-gc025ef3dd566  ***
The MQTT simple sample started
LTE Link Connecting ...
+CEREG: 2,"FFFE","FFFFFFFF",7,0,0,"11100000","11100000"
+CEREG: 0,"FFFE","FFFFFFFF",7,0,0,"11100000","11100000"
+CEREG: 2,"80F3","04987148",9,0,0,"11100000","11100000"
+CEREG: 4,"80F3","04987148",9,0,15,"11100000","11100000"
+CEREG: 4,"FFFE","FFFFFFFF",9,0,15,"11100000","11100000"
+CEREG: 2,"7B88","04DCDD86",9,0,15,"11100000","11100000"
+CEREG: 5,"7B88","04DCDD86",9,,,"11100000","11100000"
LTE Link Connected!
ERROR: getaddrinfo failed -11
ERROR: mqtt_connect -47

Waiting for your feedback

Frax

RE: nrf9160 getaddrinfo() return error -11

Håkon Alseth — Wed, 29 Apr 2020 12:38:57 GMT

Hi,

Do other examples, like mqtt_simple, resolve DNS and connect properly?

Kind regards,

Håkon