Entering eDRX and PSM mode on the nRF9160

RE: Entering eDRX and PSM mode on the nRF9160

Tester013 — Thu, 14 Jul 2022 13:55:26 GMT

This helped greatly, thank you!

RE: Entering eDRX and PSM mode on the nRF9160

SwRa — Thu, 14 Jul 2022 11:33:06 GMT

Hi Meng,

Kindly take a look at this thread: https://devzone.nordicsemi.com/f/nordic-q-a/52441/how-to-use-psm-and-edrx-mode-in-custom-code

Regards,

Swathy

RE: Entering eDRX and PSM mode on the nRF9160

Tester013 — Thu, 14 Jul 2022 10:59:07 GMT

Thank you very much for this, though I've got a follow up question in that with the asset_tracker_v2 application, the setting for PSM seems to be set to the maximum unit time (110 for bits 8-6) but that doesn't seem to be a very efficient way for the nRF9160 to sleep since by default, it seems to publish data to nRF Cloud every 2 minutes or so.

Is there any way to confirm that the nRF9160 is indeed going into PSM mode?

Additionally, is there a function to set the nRF9160 to go into PSM mode, or is that handled differently?

RE: Entering eDRX and PSM mode on the nRF9160

Craig12 — Wed, 13 Jul 2022 12:30:26 GMT

I've found by default the nRF9160 should enter a low power mode.

It can be set up in KConfig -> Modules -> nrf -> Nordic nRF Connect -> Libraries -> nRF91 LTE Link control library

Below is a snapshot of a default project:

The settings for Requested Periodic TAU and Requested Active Time can be found at infocenter.nordicsemi.com/index.jsp

The other area you may need to concentrate on is the UART (console). It can consume a bit of current, if enabled.