current consumption mesh

[pktron]

Hell ,

I am planing to use nRF52810 for one of my mesh application,now query is

1. How much power consumption its will take when RF is disable and listening only external pulse and after listen its goes to sleep mode for saving battery consumption .

I have gone through links, As per their provided detail Mesh Application is not suggesting for Battery application.Below detail has given for Application. Using Bluetooth Mesh causes higher power consumption than traditional Bluetooth low energy applications. This is mainly due to the need for keeping the radio running constantly. Therefore, unlike Bluetooth low energy advertisers, active mesh devices cannot be run off coin-cell batteries for extended periods of time

please suggest Thanks pktron

[Matt]

RF is not disabled when you want the nRF52 to "listen" for external pulse, or am I missing something here?

[ovrebekk]

Hi

The radio is enabled all the time, even if you are not actively sending any packets, so current consumption will be around 5mA on average (more if you disable DCDC).

The Bluetooth mesh specification allows for low power nodes that don't need to keep the radio enabled all the time, but these devices will not be able to relay messages, and as such can not take part in the core mesh network. Instead they need to communicate with a single friend node, which will do the relaying for it.

We don't currently support this role in the mesh stack.

Best regards
Torbjørn Øvrebekk

[loubaz]

So, even if the relay mode is not active the power consumption will stay around 5mA ? 

[ovrebekk]

That is correct.

To run mesh at lower power you need to use the concept of friendship, where a low power node is connected to a single friend node, allowing it to communicate at a pre-defined interval (similar to a normal BLE connection). 

The Nordic mesh solution doesn't currently implement lower power or friend roles, so until this is supported the power consumption will remain around 5mA. 

[george079]

Hi Øvrebekk, 

How do you measure the power consumption 5mA ?  I refered ( Measuring current ) P23 and get the 130uA for NRF52840. mesh sdk2.0.1 server  role( light_switch_server_nrf52840_xxAA_s140_6.0.0.hex ). Did I measure with wrong connector ?