RE: How best to put the NRF52840 into power saving mode

Techist — Tue, 07 Nov 2023 17:49:16 GMT

Thank you!!

RE: How best to put the NRF52840 into power saving mode

wisph — Fri, 27 Oct 2023 08:43:20 GMT

Hi,

Just a few toughts:

- Do you have a target usage defined?

- Do you have any usage measurements of your current firmware?

If not; please start with those, in many case's you dont need to do that much to reach low power usage.

Without anything special i reach ~8uA with an active LTE connection in PSM mode.

Once you have your baseline, try to figure out where the unwanted power is going, usualy it is a peripheral or the connection to it (uart/spi/etc).
To turn of the nrf busses like uart; give the CONFIG_PM a shot, you just need a reference to the device, and call pm_device_action_run(dev-pointer, PM_DEVICE_ACTION_SUSPEND | PM_DEVICE_ACTION_RESUME)

Grts,