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Optimizing current consumption for OpenThread CLI sample

Haakon F J

We are evaluating OpenThread for a custom board with a BL654 from Laird, which contains an nRF52840. When running the OpenThread CLI sample from nRF Connect SDK 1.7.1 we are measuring a current consumption of 6,8mA on average on the BL654's 3.3V VDD.

Do you have any tips for what we could disable in the configs that could help us lowering the current consumption, while still retaining the functionality as a router node?

Br
Håkon

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  • +1

    Hello Håkon,

    If you take a look at the nRF52840's Radio peripheral's electrical specification from the product specification, then you can see what the radio is using. Depending on your regulator it is somewhere between 4.6 and 9.9mA. 

    All nodes in OpenThread that are not low power nodes needs to keep the radio in RX mode at all times, which means that you will have the Radio's base current as your floor current. This means they draw a lot of current compared to BLE, which only use the radio in small bursts. 

    So I don't know what sort of current consumption that you would like to have, but if they are to function as routers, they don't have the possibility to be low power nodes. 

    Best regards,

    Edvin

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  • +1

    Hello Håkon,

    If you take a look at the nRF52840's Radio peripheral's electrical specification from the product specification, then you can see what the radio is using. Depending on your regulator it is somewhere between 4.6 and 9.9mA. 

    All nodes in OpenThread that are not low power nodes needs to keep the radio in RX mode at all times, which means that you will have the Radio's base current as your floor current. This means they draw a lot of current compared to BLE, which only use the radio in small bursts. 

    So I don't know what sort of current consumption that you would like to have, but if they are to function as routers, they don't have the possibility to be low power nodes. 

    Best regards,

    Edvin

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