nRF9160 MQTT connection failure

[khodidas]

Hi,

We are using nRF9160 ncs version 1.0.0. 

I have two queries.

We are making connection with AWS server. In the backend we have telenor server. 

We make MQTT connection, publish data and disconnect from server.

Connection interval is 5 minutes. 

We have observed that after 7-8 hours of successful connection (more than 100 times ) it gets stuck in

"connect" function inside "mqtt_client_tls_connect" function. It never comes out of "connect" function. 

Second query is we are using "lte_lc_psm_req" function to put the device in PSM mode to save power.

During first MQTT connection with AWS server device takes more than 10 minutes ( There are multiple failures in MQTT connection during this time )

Initially we get error -111 and then we get error -60. 

After 10 to 15 minutes, connection with  server is established and thereafter we don't have any issue in connection.

Can you help me in resolving this issue ?

Regards,

Smitesh Mali

[Simonr]

Hi Smitesh

We've just released a new modem firmware update (v1.0.1) that solves a lot of bugs, including more robust TLS connections, which is what we think is the issue in your application. Please try downloading and upgrading to this new modem and see if you're still having this issue. The new modem firmware update can be downloaded here.

Best regards,

Simon

[khodidas]

Hi,

Thanks for informing. 

I have kept my set up in test with v1.0.1 modem firmware. 

I will tell you status tomorrow. 

Regards,

Smitesh Mali

[khodidas]

Hi,

New modem firmware(v1.0.1) solved the issue.

Now it doesn't get stuck in MQTT connection.

Thanks !!!!!!

Regards,

Smitesh Mali