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Nrf52840 DK interface with Nrf21540 EK using Nrf5 SDK

cedriczou

Hi team,

I am currently working on a BLE project using nRF5 SDK 17.1.0, I want to interface the nrf52840 DK with the Nrf21540 EK to expand the range.

After reading various discussions, it is still unclear to me and I would like to know what can be done under the above conditions.

Thanks 

Cedric

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  • +1

    Hi there,

    The FEM is not fully supported by the nRF5SDK. Use nRF Connect SDK instead. SDK v17.1.0 includes a driver for the FEM but it's does not support all the features of the FEM. 

    regards

    Jared 

  • 0 in reply to Jared

    Thanks for the answer,

    That's what I get Using nRF connect will be a lot easier, but I have to use the v17.1.0 SDK.

    - Do you know what you can do and what features are supported in SDK 17.1.0 for FEM?

    - What would be the approach to be able to use the FEM over BLE with SDK17.1.0 ?

    - What steps would you take to complete the task?

          I'll interface the FEM using the external driver and test it with the example provided by Nordic 

          But then how do you adapt it to BLE communication? PA/LNA ?

  • 0 in reply to cedriczou

    Hi,

    cedriczou said:
    Do you know what you can do and what features are supported in SDK 17.1.0 for FEM?

    To be more clear, nRF21540 is not officially supported by nRF5SDK. The driver I pointed to in my previous reply is what we have, and we do not offer anything else. I would therefore strongly suggest that you use nRF Connect SDK if you're going to use our FEM. 

    cedriczou said:

    What would be the approach to be able to use the FEM over BLE with SDK17.1.0 ?

    - What steps would you take to complete the task?

          I'll interface the FEM using the external driver and test it with the example provided by Nordic 

          But then how do you adapt it to BLE communication? PA/LNA ?

    Essentially, you would have to improve and add on the driver so that it supports the features that is described in the FEM product specification. We have an old blog post on how to add PA/LNA support for our Softdevice with PPI and GPIOTE, that is worth a read.

    regards

    Jared 

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  • 0 in reply to cedriczou

    Hi,

    cedriczou said:
    Do you know what you can do and what features are supported in SDK 17.1.0 for FEM?

    To be more clear, nRF21540 is not officially supported by nRF5SDK. The driver I pointed to in my previous reply is what we have, and we do not offer anything else. I would therefore strongly suggest that you use nRF Connect SDK if you're going to use our FEM. 

    cedriczou said:

    What would be the approach to be able to use the FEM over BLE with SDK17.1.0 ?

    - What steps would you take to complete the task?

          I'll interface the FEM using the external driver and test it with the example provided by Nordic 

          But then how do you adapt it to BLE communication? PA/LNA ?

    Essentially, you would have to improve and add on the driver so that it supports the features that is described in the FEM product specification. We have an old blog post on how to add PA/LNA support for our Softdevice with PPI and GPIOTE, that is worth a read.

    regards

    Jared 

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