Check results related with change TX power and RSSI values.

RE: Check results related with change TX power and RSSI values.

sotillo2409 — Mon, 20 Sep 2021 10:22:05 GMT

Hi,

[quote userid="73165" url="~/f/nordic-q-a/79713/check-results-related-with-change-tx-power-and-rssi-values/330226#330226"]Have you tuned your custom board? [/quote]

No, i didn't tunned, i don't have a nrf52840 DK , because of that i compared with nrf5340 DK.

Yes more or less the data between devices makes sense so I conform with it.

Thank you for check,

regards.

RE: Check results related with change TX power and RSSI values.

Jared — Mon, 20 Sep 2021 10:16:28 GMT

Hi,

Have you tuned your custom board?

Preferably I would like you to compare it with a nRF52840 DK not a nRF5340 DK. Nevertheless you get somewhat a similar result, maybe that indicates that your result is the expected for your environment.

regards

Jared

RE: Check results related with change TX power and RSSI values.

sotillo2409 — Fri, 17 Sep 2021 10:32:00 GMT

That is a cool idea, i tried it with nrf53 with default tx settings connecting with my custom board and i get around -35dB.

My custom board is a fanstel bc840 with an external ANT.

I am not so convinced about the results.

All of this is to try a long range test, and until now my maximum distance was on 600 meters aprox on free obstacles line, using coded PHY between 2 custom boards. The test was on a industrial area with considerable noise.

RE: Check results related with change TX power and RSSI values.

Jared — Fri, 17 Sep 2021 09:12:52 GMT

Hi,

[quote user=""] Is it possible put up the tx power more than +8db??[/quote]

No, that is the maximum tx power for the nRF52840.

[quote user=""]Is it normal this results? this meassure of RSSI make sense?[/quote]

It's difficult to say, RSSI is not an accurate estimate and depends on several external factors. You also mentioned that you use a custom board, have the board been properly tuned? Try flashing your example to a nRF52840 development kit and see what RSSI you get in the same environment.

regards

Jared