nRF7002 idle (not "sleep") current draw and wake up time from "sleep"

RE: nRF7002 idle (not "sleep") current draw and wake up time from "sleep"

Stian Røed Hafskjold — Thu, 02 Mar 2023 12:15:56 GMT

1) Yes, that is correct, but the default beacon interval is usually 100ms, so not sure if you can go any lower than 100ms. 165uC / 100ms = 1.65 mA average.

2) The graph shows everything from disconnected state to searching and reconnecting to the router. The 50mA draw is the radio receiver. It enters DTIM after cursor 2 in the plot, and the interval is set to 100ms.

RE: nRF7002 idle (not "sleep") current draw and wake up time from "sleep"

Guilherme de Paula — Tue, 21 Feb 2023 22:42:05 GMT

Thank you Stian. Just some follow up...

1) Ok, so if we set the the DTIM interval to just over 8 ms, then we would average about 20.78 mA, right?

2) Is the DTIM interval set to about 3 or 4 s in this use case? I was wondering what it's doing for those about 3 to 4 s where it's drawing about 50 mA but apparently there is no activity.

Thanks again,

Gil

RE: nRF7002 idle (not "sleep") current draw and wake up time from "sleep"

Stian Røed Hafskjold — Sun, 19 Feb 2023 15:10:14 GMT

Hi,

1) This depends on the DTIM interval. Please take a look at the measurements here: https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/nrf/working_with_nrf/nrf70/developing/powersave.html#power-profiling

2) Here is an example showing wake-up and reconnection to the router until it enters DTIM power saving mode (at cursor 2):

Best regards,
Stian