How to know for sure that PSM is working on nrf9160DK

[crasspm]

Is there a sure fire way to know for sure that my PSM configuration is correct on the nrf9160DK?  I'm trying to get LTE-M + GPS working and I'm still not sure if I'm in PSM mode correctly.  Which AT commend can I use to verify?

[Øyvind]

Hello, 

To configure PSM, you can use AT+CPSMS. The AT+CEREG will give you the current TAU configured by the network. Be aware that the PSM you request may not be exactly what the network grants your device. See this answer from my colleague as well.

Kind regards,

Øyvind

[crasspm]

Thanks Øyvind!  One more question:  If I enable PSM via AT+CPSMS and get a successful connection, is this also an authoritative way to say that PSM is accepted or is there a fallback?  I'm using the mqtt_simple example.

[Øyvind]

Yes, if you get a connection and the network responds with something similar to what you asked for, then PSM is accepted.

Kind regards,
Øyvind