Automatically wake up NRF52840 from SYSTEM OFF mode every 5 mins

RE: Automatically wake up NRF52840 from SYSTEM OFF mode every 5 mins

Jared — Thu, 18 Jan 2024 09:26:10 GMT

Yes,

The IDLE thread will run when no other thread is running, see Lesson 7 in the fundamental course in our Nordic Developer Academy,

regards

Jared

RE: Automatically wake up NRF52840 from SYSTEM OFF mode every 5 mins

aaminu — Wed, 17 Jan 2024 15:54:44 GMT

Thank you for your prompt response, and I am using the nRF Connect SDK. Also, does the system enter an idle state if I yield the main thread i.e k_msleep for a long duration (ca. 2mins), assuming no debugger is connected, and the other threads are system controlled?.

PS: I am aware I can explicitly call the k_cpu_idle()/k_cpu_atomic_idle(key)

Regards

A.Aminu

RE: Automatically wake up NRF52840 from SYSTEM OFF mode every 5 mins

Jared — Wed, 17 Jan 2024 07:45:28 GMT

Hi,

The difference between System Off and System ON(IDLE) is desribed here.

What API to use depends on what SDK you're using, are you using nRF Connect SDK or nRF5SDK?

regards

Jared

RE: Automatically wake up NRF52840 from SYSTEM OFF mode every 5 mins

aaminu — Tue, 16 Jan 2024 16:13:17 GMT

Hello Jared, can you please clarify what the SYSTEM ON IDLE is or an API link to it. I am currently stuck on the best approach to take. Thank you

RE: Automatically wake up NRF52840 from SYSTEM OFF mode every 5 mins

Jared — Mon, 08 Jan 2024 10:14:55 GMT

Hi,

Unfortunately, all timers are turned off in SYSTEM OFF. You have to use an external device for this, or use SYSTEM ON IDLE.

regards

Jared