CoAP connection prevents LTE module from switching to RRC idle mode

[Leo01]

I found that CoAP requests unexpectedly block GPS positioning. So, the solution is to add a synchronization semaphore between them.
I stopped the CoAP request while waiting for GPS positioning to complete, but it still seems to prevent LTE mode switching.
Do I need to turn off the CoAP client to avoid this? It didn’t seem necessary before, as LTE worked fine when switching to RRC idle mode.
Does anyone know why this is? What else could prevent the LTE module from switching to RRC idle mode?

[Simon D-M]

Hi,

As a start, I can recommend you to check our Cellular IoT Fundamental course on Dev Academy. It contains a section dedicated to GNSS. In the exercise 2 of that section, it is explained in more details how to handle GNSS alongside LTE.

If that wasn't enough, I'll probably need some code snippet or at least some better explanation on what your code actually do. In order for me to determine why the LTE modem didn't switch to RRC Idle.

Best regards,

Simon D-M