System Off

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Overview

This sample can be used for basic power measurement and as an example of deep sleep on Nordic platforms.

RAM Retention

This sample can also can demonstrate RAM retention. By selecting CONFIG_APP_USE_NRF_RETENTION=y or CONFIG_APP_USE_RETAINED_MEM=y state related to number of boots, number of times system off was entered, and total uptime since initial power-on are retained in a checksummed data structure. RAM is configured to keep the containing section powered while in system-off mode.

Requirements

This application uses nRF51 DK, nRF52 DK or nRF54L15 DK board for the demo.

Sample Output

nRF52 core output

*** Booting Zephyr OS build v2.3.0-rc1-204-g5f2eb85f728d  ***

nrf52dk system off demo
Entering system off; press sw0 to restart

See also

System power off

Device