nRF9160 thingy91 - AWS IOT (sample): Connect errors -11 and -10

[johnwest]

Hello All,

This is from an app I had working 1 1/2 months ago - when I've tried recently to get it connected again, I haven't been successful.

The latest asset tracker appears to work find and posts data to the nRF Cloud.

I've seen previous posts - DNS is working - or appears to be ok.

I'm getting the following:

===

+CSCON: 0

RRC mode: Idle

Next connection retry in 30 seconds

AWS_IOT_EVT_CONNECTING

+CSCON: 1

RRC mode: Connected

E: getaddrinfo, error -11

E: client_broker_init, error: -10

AWS_IOT_EVT_CONNECTING

+CSCON: 0

RRC mode: Idle

Next connection retry in 30 seconds

AWS_IOT_EVT_CONNECTING

+CSCON: 1

RRC mode: Connected

E: getaddrinfo, error -11

E: client_broker_init, error: -10

AWS_IOT_EVT_CONNECTING

+CSCON: 0

RRC mode: Idle

====

I can reload the asset tracker and it'll work fine.  I'm running the AWS_IOT sample code.

Thanks in advance as to what -11 and -10 mean - it would appear getting the address fails - I tried to find error codes that make sense but not sure and wanted to ask in case something has changed in the last 1 1/2 months.  This app used to run without issue.

Thanks!
jwest

[johnwest]

Hello Didrik,

I found this:

https://github.com/nrfconnect/sdk-nrf/blob/v1.7.1/lib/nrf_modem_lib/nrf91_sockets.c#L502

Appears to be the default return - return DNS_EAI_SYSTEM;

According to the AT commands I've checked - DNS is supposed to be OK here.

I've looked at the addresses AWS assigns - they're pingable but obviously assigned from a pool -
and you can't count on them being assigning the same address on consecutive attempts (like what a WiFi router does when it
sees the same MAC address).

I found this thread, which is helpful:

https://devzone.nordicsemi.com/f/nordic-q-a/77231/nrf9160-getaddrinfo-return-dns_eai_system-and-errno-0/319300

When I did my 'original' search - I didn't find that for some reason, but I did find a thread that mentioned something could be up with DNS.

I did add this to my code:

#include <nrf_socket.h>

struct nrf_in_addr dns;

...

in main()

dns.s_addr = 134744072; // Google DNS, 8.8.8.8

const int error1 = nrf_setdnsaddr(2, &dns);
printk("DNS set result %d\n", error1);

before modem_configure();

after I saw the first -11 error.

Regards,
johnwest

[johnwest]

Didrik,

Just saw one of these again - 

W: connection_poll_start failed, error: -119

Regards,

johnwest