MQTT Sample code is not connecting

[vkadal]

The sample code at ncs/nrf/samples/nrf9160/mqtt_simple is not connecting. I dod not make any changes to the ode. I am using NB-IoT. LTE is connected. The link monitor, LTE is in green. The error code is ERROR: mqtt_connect -60

Kindly advice to resolve this

[vkadal]

The server is running on a web server, but it works when tested with a mobile app

[Håkon Alseth]

Please see my former answer on how to check if a domain has ipv4 and ipv6 capabilities. As mentioned, the domain that you are connecting to doesn't have ipv6.

[vkadal]

Last time you have told me to write to cloud MQTT  and check for IPv6 and they said they don't support. In this case, I installed a mobile app, set my SIM to only IPv6 and it is transmitting data, 

Did you try  to test the server for IPv6 compatibility ? 

[Håkon Alseth]

Please use a service for ipv6 dns lookup. If you search using google/duckduckgo etc for this, you will find one. If you have ipv6 connection, you can use "nslookup" program.

That will show that there's only a ipv4 answer for www.beavernews.net:

$ nslookup beavernews.net
Server:		127.0.0.53
Address:	127.0.0.53#53

Non-authoritative answer:
Name:	beavernews.net
Address: 64.111.109.81

 

Here's an example how it should look if ipv4 and ipv6 are both reported:

$ nslookup google.com
Server:		127.0.0.53
Address:	127.0.0.53#53

Non-authoritative answer:
Name:	google.com
Address: 172.217.5.238
Name:	google.com
Address: 2607:f8b0:4004:82a::200e

[vkadal]

I am able to successfully publish and subscribe data to test.mosquito.org and  visualize  through MQTT lens (Chrome extension) 

I am closing this tikcet. Thansf for the help