NRF21540 EK interfacing using NRF5 SDK

RE: NRF21540 EK interfacing using NRF5 SDK

Rajeev_k — Fri, 15 Mar 2024 11:56:51 GMT

OK, The Device could be faulty.

Thanks

RE: NRF21540 EK interfacing using NRF5 SDK

Karl Ylvisaker — Tue, 03 Oct 2023 14:00:41 GMT

Hello Rajeev,

What were the RSSI's in these cases?
You can also check this more easily (due to less variance) if you run the test with the devices placed right next to each other on the desk - this will eliminate most of the possible interference which you will see over 40 meters without line of sight.

Best regards,
Karl

RE: NRF21540 EK interfacing using NRF5 SDK

Rajeev_k — Fri, 29 Sep 2023 12:52:29 GMT

Hi Karl, I did , checked the rssi value at a fixed distance (40 meter) before and after enabling the FEM. In both cases the device did not have Line Of Sight. Is this because of any other issue.

Regards

Rajeev

RE: NRF21540 EK interfacing using NRF5 SDK

Karl Ylvisaker — Fri, 29 Sep 2023 12:08:03 GMT

Hello,

Thank you for providing the .conf file - looking through it it seems to me that you have all the necessary configurations present.

Did you have a chance to check if there was any difference at all when using this, compared to when you do not enable FEM?

Best regards,
Karl

RE: NRF21540 EK interfacing using NRF5 SDK

Rajeev_k — Thu, 28 Sep 2023 11:43:35 GMT

attached here, I have renamed the file to config.txt for ease of uploading

/cfs-file/__key/communityserver-discussions-components-files/4/1663.config.txt

RE: NRF21540 EK interfacing using NRF5 SDK

Karl Ylvisaker — Thu, 28 Sep 2023 11:08:59 GMT

Hello Rajeev,

Could you share your entire .conf file from the build you are running, so that I may take a look?
You can find this file in the build/zephyr/ location, and it contains all the kconfigs that are set in the build.

[quote user="Rajeev_k"]is there a way to check if the FEM is enabled externally. [/quote]

The simplest way to check this externally is to just use the nRF Connect SDK application for Desktop or Smartphone to scan for your device, and then read out the RSSI of the advertising.
You could also do measurements on the hardware directly, but this requires a proper lab setup, and you will get a good indication whether the TX Power have changed just using the RSSI.

Best regards,
Karl

RE: NRF21540 EK interfacing using NRF5 SDK

Rajeev_k — Thu, 28 Sep 2023 05:38:48 GMT

Hi Andreas,

I have addded this CONFIG_BT_CTLR_TX_PWR_ANTENNA to my prj.config, still I havent been able to see any change in range. It would a great help if you can help me enable the FEM. PS. is there a way to check if the FEM is enabled externally.

Kind regards,

Rajeev

RE: NRF21540 EK interfacing using NRF5 SDK

AHaug — Wed, 27 Sep 2023 11:44:06 GMT

Hi,

From Thingy 53 and nRF21540 Frontend (Bluetooth Mesh) - How to set TX power via SPI you can see that adding CONFIG_BT_CTLR_TX_PWR_ANTENNA should enable what you want

Let me know if this resolves your issue

Kind regards,
Andreas