about nRF21540DK periodic_adv long rang

[yoyou]

Hello,

NCS1.9.1, two nRF21540DK,  Windows10 X64, VS Code,

periodic_adv and periodic_sync , only 3M distance can recv data,

if over 3m, will unstable reception / disordered data .

why?

  

   

thanks 

Best Regards

[PaKa]

Did you try to test this without the external antennas to ensure they are not causing any issues?

[Susheel Nuguru]

I have not tested the periodic advertising but have tested the extended advertising with nRF21540 DK and TX power of the FEM set to 20dBm and did get good results without using any external antennas. I am also curious to see if you still see the same results without external antenna. If you do so, then I need to replicate your setup to be able to dig deeper into this issue. Please test without external antennas and if the issue remains, give me a minimalistic project for me to test it on my end.

[yoyou]

HI,

thanks for reply,

yes,i've test it without the external antennas,it is will lager than 40M distance ,

   

Best Regards

[yoyou]

Hi,

thanks for reply,

i've test it without the external antennas,it is will lager than 40M distance ,

8640.test_periodic_adv.rar

rar is a minimalistic test project,

i want to set max power and max GAIN,(all maximum,for long rang).

and i need change to use nRF5340DK+nRF21540EK,

but i do not know how to write overlay file.

i follow Working with RF front-end modules — nRF Connect SDK 1.9.99 documentation (nordicsemi.com)

if possible,please help me fix my conf and overlay  for nRF5340DK+nRF21540EK.

and than i will compare distance with nRF21540DK, 

the purpose is only for greater distance.

         

thanks

Best Regards

[Susheel Nuguru]

for nRF21540DK, please check the distance and the project files attached in the blog for comparing distance between 21540DK and 52840DK. You should be able to use the attached project (written for nRF Connect SDK v1.8.0 but i think it should work also with 1.9.1). You can look at the proj.conf and overlays in the project attached.