How to enable low power mode in nrf52840?

RE: How to enable low power mode in nrf52840?

Priyanka — Thu, 19 Sep 2024 12:50:53 GMT

Hi,

Yes, you can use the overlay-lpn.conf to enable LPN mode in other mesh samples like the chat sample. But please make sure that the settings in the overlay file are apt for that particular sample and hardware you use.

[quote user="cyriactoms"]Also where to give this command.[/quote]

this is a runtime command that can be issued through the shell interface of the application. Once the firmware is flashed and running, you can access the shell over UART or RTT and then give this command there.

-Priyanka

RE: How to enable low power mode in nrf52840?

cyriactoms — Tue, 10 Sep 2024 07:20:11 GMT

Hi,

can we use this overlay-lpn.conf in every mesh sample to configure the LPN mode. I am using the chat sample so if i need to enable it can i use the same method. And also for custom boards with nrf52840 soc.

[quote userid="107729" url="~/f/nordic-q-a/113745/how-to-enable-low-power-mode-in-nrf52840/501346"]After building and flashing the firmware, you can enable or disable the Low Power operation using the mesh lpn set <Val(off, on)> command.[/quote]

Also where to give this command.

RE: How to enable low power mode in nrf52840?

Priyanka — Thu, 05 Sep 2024 11:40:01 GMT

Hi,

Yes, it is possible to enable LPN in the nRF52840 DK. In the Bluetooth Mesh Light Switch sample, you can see that it provides a configuration overlay overlay-lpn.conf which is optimized for the nRF52840 DK. This configuration overlay enables the LPN feature and alters certain configuration options to further lower the power consumption.

when you build the sample, just set the EXTRA_CONF_FILE to overlay-lpn.conf. You can see it explained here: https://docs.nordicsemi.com/bundle/ncs-latest/page/nrf/samples/bluetooth/mesh/light_switch/README.html#configuration:~:text=To%20make%20the,you%20are%20building%3A

After building and flashing the firmware, you can enable or disable the Low Power operation using the mesh lpn set <Val(off, on)> command. Once enabled, the device will turn off its radio and start polling for friend nodes.
You can perform a poll to the friend node to receive any pending messages using the mesh lpn poll command. This is only available when LPN is enabled.

RE: How to enable low power mode in nrf52840?

cyriactoms — Tue, 03 Sep 2024 11:29:20 GMT

Is it possible to enable low power node in nrf52840dk if so how to enable and what are the steps that need to be followed i have refered the bluetooth light switch sample but i am not claer about the explanation inside it. if possible kindly give me the steps to enable the lpn

RE: How to enable low power mode in nrf52840?

Priyanka — Tue, 13 Aug 2024 08:31:38 GMT

Hi,

As mentioned in this ticket, the number of Low Power Nodes that's connected to a friend node is restricted mainly by the amount of traffic in the network. The Friend node needs to hold messages for the nodes it is a parent for, which limits the number of LPNs it can handle.

[quote user="cyriactoms"]what is the possible way to implement that feature in mesh network. [/quote]

Please refer the tickets that I had attached in the previous comment. You can also refer the Technical Documentation regarding the Low Power Nodes for detailed information.

-Priyanka

RE: How to enable low power mode in nrf52840?

cyriactoms — Thu, 08 Aug 2024 09:53:40 GMT

Hi Priyanka,

how many low power nodes can be connected to the friend node. If it doesnt have any direct example what is the possible way to implement that feature in mesh network. Could you please help me out on this

RE: How to enable low power mode in nrf52840?

Priyanka — Thu, 08 Aug 2024 08:02:54 GMT

Hi,

I'm afraid there's no direct example for this, but for the Mesh, because the devices must continuously keep their radio in listening mode, this causes higher power consumption. The friendship feature in Bluetooth Mesh (also mentioned there) allows low-power devices to establish a relationship with a regular mesh device. Please take a look at this ticket.

Things you should know about Bluetooth mesh

Regards,

Priyanka