Zephyr ncs sleep modes

Zephyr and Nordic ncs Sleep Modes 2022-01-15 Tuesday

Some posts and links to follow:

• https://devzone.nordicsemi.com/f/nordic-q-a/83227/how-to-put-nrf52832-into-a-deep-sleep-mode-for-some-amount-of-time-as-well-as-wake-it-up-from-deep-sleep-mode-which-header-file-contains-all-these-functionalities/345474#345474
And from this post, note however these forum replies are for Nordic nRF5x family parts:
• https://devzone.nordicsemi.com/f/nordic-q-a/51648/how-to-put-nrf52840-to-deep-sleep-system-off/207410#207410 post ~two years ago (2019) by Nordic Semi Amanda Hsieh
• https://infocenter.nordicsemi.com/index.jsp?topic=%2Fcom.nordic.infocenter.nrf52832.ps.v1.1%2Fpower.html&cp=4_2_0_17_1&anchor=unique_2047546596

Looking now more closely at nRF9160 System in Package (SiP):

• https://infocenter.nordicsemi.com/topic/nwp_041/WP/nwp_041/sleep_types/flight_mode_sleep.html
• https://infocenter.nordicsemi.com/topic/nwp_041/WP/nwp_041/example_sequences/uplink_data_psm.html
• https://infocenter.nordicsemi.com/topic/ps_nrf9160/product_overview.html
• https://infocenter.nordicsemi.com/topic/ps_nrf9160/chapters/current_consumption/doc/frontpage.html

Oh and a note on nRF9160 watchdog timer:

• https://infocenter.nordicsemi.com/topic/ps_nrf9160/wdt.html

This looks important:

• https://devzone.nordicsemi.com/f/nordic-q-a/81744/nrf9160-deep-sleep-power-consumption-help

^ nRF9160 Sleep Mode Forum Posts

nRF9160 sleep mode not working in SDK 'nrf' v1.6.1, works in 1.7.0 . . .

• https://devzone.nordicsemi.com/f/nordic-q-a/80282/nrf9160-sleep-mode

Symbol 'PSM' may be a more apt symbol for which to search, also looks like power savings modes may only be practical with certain network providers:

• https://devzone.nordicsemi.com/f/nordic-q-a/63702/testing-power-saving-mode-psm-on-nrf9160

^ Power Savings Mode Ten Minutes Period Example

• https://devzone.nordicsemi.com/guides/cellular-iot-guides/b/hardware-design/posts/measuring-psm-idle-current-on-the-nrf91-dk

Excerpts from this post:

"In order to achieve the lowest possible current consumption, logging has to be turned off. This is done by,

Adding the CONFIG_SERIAL=n flag to the prj.conf file in the project folder.
Adding the CONFIG_SERIAL=n to the SPM prj.conf file. This is located in the SDK_ROOT/nrf/samples/nrf9160/spm folder."