LTE connection issue

[Rkidechaa]

Hi,

I am using nrf9160 to handle the MQTT protocol and collect the data packets from another microcontroller using the UART interface. 

Sending the data to the server using LTE, for this implementation using LTE every 5 minutes. So calling LTE function in while loop after every 5 minutes.

Every time I call the function it will take a long time to connect LTE and sometimes it is not connecting even. Facing lots of problems with LTE connection. I have tried the ibasis and hologram sim card. But getting the same issue.

what do I do to get a stable and faster LTE connection?

Or tell me the alternative method to send the data every 5 minutes or 10 minutes. 

Kindly help!

Thanks and Regards,

Rahul

[Charlie]

Hi Rahul,

Please check advice from another discussion: (+) LTE connection slow - Nordic Q&A - Nordic DevZone - Nordic DevZone (nordicsemi.com).

I also I have other suggestion that may help to find the issue:

1. Use nRF9160: AT Host to test the connection time, so you can confirm that the issue is not related to your custom program.

2. If the problem is caused by LTE network, use Trace Collector to a modem trace for the nRF9160 and send it to us to find the cause.

3. Try to test in different places, just in case your location is on the edge of LTE-M base station coverage. 

4. Ask your SIM card provider for more advice.

Best regards,

Charlie

[Rkidechaa]

Hi charlie,

You suggested very good option to get fast connection to LTE.

I always connected through band 12 for AT&T network. So I just need to use band 12. for that i am using below command. 

AT%XBANDLOCK=2,"100000000000"

Except this do i need to use anything else in project and config file

Thank you
Rahul