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Does SoftDevice S112 or S113 offer mesh support on a nRF52811?

LarsH

Does SoftDevice S112 or S113 offer mesh support on a nRF52811?

The intended use is for an end-device running very simple app-logic. According to the SoftDevice properties in "s112_nrf52_7.0.1_release-notes.pdf" the combined MBR and SoftDevice memory requirements are 100.0 kB flash and 3.7 kB RAM. That leaves about 24 kb so it ought to be doable if the application fits within that space, isn't it? 

What I also couldn't figure out, is if the mesh functionality affects the call stack heavily. The release notes states that the worst-case stack usage is 1.5 kB but that seems a bit low.

Btw, what's basic difference between S112 and S113? I couldn't find any comparison charts regarding this.

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  • 0

    Hi Lars

    The only limitations should be the limited RAM and Flash memory in this chip, which results in no support for DFU and logging (these are the main features that will be missing). The RAM and Flash memory will also restrict the maximum size of your application, as you can't have very large applications on the nRF52811.

    As mentioned in the compatibility notes, the Low Power node example is not supported on the nRF52810 (and therefore not on the nRF52811 either). This is because the example includes the Buttonless Secure DFU Service to perform DFU over BLE as well as logging. So to be able to make a low-power node application for the nRF52811 you will have to disable/remove both of these features from the example project, and make sure that it is compatible in terms of size with the nRF52811.

    As for documentation regarding the Mesh SDK, it should be covered on the Infocenter, but we also have some Mesh guides here on the Devzone as well.

    Best regards,

    Simon

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  • 0

    Hi Lars

    The only limitations should be the limited RAM and Flash memory in this chip, which results in no support for DFU and logging (these are the main features that will be missing). The RAM and Flash memory will also restrict the maximum size of your application, as you can't have very large applications on the nRF52811.

    As mentioned in the compatibility notes, the Low Power node example is not supported on the nRF52810 (and therefore not on the nRF52811 either). This is because the example includes the Buttonless Secure DFU Service to perform DFU over BLE as well as logging. So to be able to make a low-power node application for the nRF52811 you will have to disable/remove both of these features from the example project, and make sure that it is compatible in terms of size with the nRF52811.

    As for documentation regarding the Mesh SDK, it should be covered on the Infocenter, but we also have some Mesh guides here on the Devzone as well.

    Best regards,

    Simon

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  • 0 in reply to Simonr

    Hi!

    Just to sum up so I did not misunderstand: It's just the example application itself ("Low Power node example") that cannot fit because of the size but otherwise there are no restrictions in the respective SoftDevice besides DFU, logging and size of ram and flash for the nRF52811?

    What about the worst-case scenario with 1.5 kB usage for the call stack, is this still the case as stated in the release notes? Does that in include link and connection state information as well? It would be really useful if there was some kind of estimate for connection state sizing so on.
    --

    Thanks Lars.

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