DFU_OTA in Low Power Mode on nRF5340

[Krishnachandran_a]

Hi,

We are currently working on a project using the nRF5340 and are integrating DFU_OTA (Device Firmware Update Over-The-Air) functionality. Our goal is to implement DFU_OTA while ensuring the device remains in low power mode to optimize battery life.

However, we are encountering an issue where the current consumption remains very high even with our current DFU-OTA configuration. We suspect this might be related to the power management during the DFU process.

Could you please provide an example or guidance on how to effectively implement DFU_OTA in low power mode using the nRF5340 with SDK version 2.4.2? Any specific code snippets, configuration settings, or references to relevant documentation that could help us address the high current consumption would be greatly appreciated.

Thank you in advance for your assistance!

Krishnachandran

[Menon]

Hello,

Could you provide some additional details about how your application is configured to enter low power modes on the nRF5340? Specifically, is this on a Development Kit (DK) or a custom board? Additionally, could you elaborate on how and when you are measuring the current consumption?

Kind regards,

Abhijith

[Krishnachandran_a]

Hi,

Menon said:

is this on a Development Kit (DK) or a custom board?

Custom Board.

Menon said:

could you elaborate on how and when you are measuring the current consumption?

We are measuring using PPkit 2 and measuring after Reboot, and all peripheral are not working, that means not started only MCU is on.

Menon said:

Could you provide some additional details about how your application is configured to enter low power modes on the nRF5340?

used bello setting and associated Functions.

#powerM

CONFIG_PM=y

CONFIG_PM_DEVICE=y

CONFIG_PM_DEVICE_RUNTIME=y

Thanks in advance.

Krishnachandran.

[Menon]

Hello,

It seems that the MCU is being kept in an active state by something not immediately visible. Try manually forcing the MCU into a low-power state after rebooting to see if it helps. You can use the pm_state_force function from the Power Management API. Check the implementation of this function in the sample provided for reference.

Kind regards,

Abhijith