Bluetooth mesh: How to reduce the power consumtion.

[binhla]

Dear all,

I am developing a bluetooth mesh sensor with the NRF52833 and NRF Connect SDK.

The sensor is battery powered. So the power consumtion must be as low as posible.

My sensor have two working mode: Normal and Sleep.

In Sleep mode, the current is about 3uA.

In Normal mode, the current is from 11 to 12 mA with the node is provisioned.

So I want to know which configuration affect the current of a SOC run bluetooth mesh.

Best regards.

[Simonr]

Hi

By default, a Bluetooth Mesh node is pretty power hungry, and to run it at lower power you need to use the concept of Friendship in Mesh, where a low power node is connected to a Friend node, allowing it to communicate at a pre-defined interval (similar to a standard BLE connection). Here's some more information on the Bluetooth Mesh models available in the nRF Connect SDK.

This requires that you also have another node in your Mesh network somewhat nearby the low power node that is not restricted to this low power mode though. If that's not possible either then a Mesh network might not be what you're looking for. This depends on what your end use case is though.

Best regards,

Simon

[binhla]

Dears,

Thank you for your prompt response.

Simonr said:

This requires that you also have another node in your Mesh network somewhat nearby the low power node that is not restricted to this low power mode though

Yes, I have nodes that could be used as friend nodes. But I do not know how to properly do that.

Can you provide an intruction for implementing friend nodes and low power nodes?

Best regards.

[binhla]

Dears,

Update that I have a Node config as Low power node and another node become friend node.

And the Low power node current in sleep mode is about 1mA.

It still quite high.

In theory, can I get a lower current in Low power node?

Best regards.