RTC, timer and low power mode

[Lavanya_Manohar]

We have using nrf5340-nrf7002 in our custom board. SDK version 2.6.1

We understand that the timer will not function in System OFF (deep sleep) mode. However, our project is battery-operated, so we need a sleep/low power mode to minimize power consumption.

In our products, we have planned to  implement a periodic interval cycle for10-minute sleep/low power mode and wakeup using an RTC timer interrupt. We want use the RTC to set/get calendar time. 

1 How can we achieve similar functionality in nRF5340?

2. Could you please advise us on the available low power modes in nRF devices and, specifically, how to wake up from System OFF using a timer interrupt?

[Kazi Afroza Sultana]

Hello,

It seems you want to use the timer based ON/OFF on the host. It is implemented in nRF5340. Only if Wi-Fi is used, then you have to take care of shutdown/restart of Wi-Fi interface as required by your application.

I will ask our team to know more about this. Currently its summer vacation time in Norway. There would a bit delayed response perhaps. 

Thanks for your patience.

BR

Kazi

[Lavanya_Manohar]

Hi Kazi,

For Wifi, we have a LDO which provide Power source for WIFI module and can be control by Host. 

Is there any update from ur team?

[Kazi Afroza Sultana]

Hello,

If you want to manually shut off and on the network interface for Wi-Fi you can use net_if_down() and net_if_up(). You can see an example of how to use these in the Wi-Fi shutdown sample.

[Lavanya_Manohar]

Yes, We will check Wi-Fi shutdown.

is there any update for below queris?

Lavanya_Manohar said:

1 How can we achieve similar functionality in nRF5340?

2. Could you please advise us on the available low power modes in nRF devices and, specifically, how to wake up from System OFF using a timer interrupt?