nRF9160 Sleep and Idle power consumption

RE: nRF9160 Sleep and Idle power consumption

Håkon Alseth — Mon, 11 Oct 2021 10:34:28 GMT

Hi,

[quote user="nicolae.georgescu"]It seems most IoT applications allow larger sleep times and our usecase in which the user controlls the device and expects up to 2-3 seconds of delay is not the standard. I would appreciate if you confirm that my understanding is correct:
- We can set the 1.28 or 2.56 iDRX interval. This is basically using standard DRX sleep mechanism.
- eDRX is an extended DRX and we can set it to 5.12 and this would allow a longer idle time and less checks for received messages. This is as long as the network also allows the 5.12s eDRX interval.
Is my understanding corect?[/quote]

Yes, you're right. You can disable both eDRX and PSM, in which you're in a higher level of sleep (connected DRX), with lower latency and higher current consumption.

[quote user="nicolae.georgescu"]And again, just to be 100% sure, the nRF9160 modem supports the above settings, right?

If so, i will order a development kit and see how it goes from there![/quote]

Yes, we support eDRX. 5.12 s is the lowest you can set/get with this power mode, provided that the network gives you this timing:

https://infocenter.nordicsemi.com/topic/ref_at_commands/REF/at_commands/nw_service/cedrxrdp_set.html?cp=2_1_7_4_0

Kind regards,

Håkon

RE: nRF9160 Sleep and Idle power consumption

nicolae.georgescu — Mon, 11 Oct 2021 09:18:08 GMT

Hi,

Thanks for the link for the power calculator, it's really useful!

It seems most IoT applications allow larger sleep times and our usecase in which the user controlls the device and expects up to 2-3 seconds of delay is not the standard. I would appreciate if you confirm that my understanding is correct:
- We can set the 1.28 or 2.56 iDRX interval. This is basically using standard DRX sleep mechanism.
- eDRX is an extended DRX and we can set it to 5.12 and this would allow a longer idle time and less checks for received messages. This is as long as the network also allows the 5.12s eDRX interval.
Is my understanding corect?

And again, just to be 100% sure, the nRF9160 modem supports the above settings, right?

If so, i will order a development kit and see how it goes from there!

Thanks

RE: nRF9160 Sleep and Idle power consumption

Håkon Alseth — Mon, 11 Oct 2021 08:43:28 GMT

Hi,

Have you tried our power calculator?

https://devzone.nordicsemi.com/nordic/power

In your case, if you disable PSM, then enter those intervals as drx interval, you should get an approximation.

We also have some scenarios mentioned in our specification:

https://infocenter.nordicsemi.com/topic/ps_nrf9160/_tmp/alta.nRF9160/autodita/CURRENT/parameters.id_current_modem.html?cp=2_0_0_4_1_0_14

[quote user=""]What is the power consumption in this case?[/quote]

Every calculator is an approximation, and is highly likely to vary from actual use-cases. To get the actual current consumption for your scenario, the best scenario is to measure this when you're connected to your local network.

Kind regards,

Håkon