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

[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,

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. 

[yoyou]

Hi,

your link

Best Regards

[Susheel Nuguru]

Hi, I am sorry, the blog seems to be unpublished for external viewers, in which case it will be published very soon. I will let you know as soon as it is published (most likely in few days)

[Susheel Nuguru]

The blog should be published now. Please check if you have access to it.

[yoyou]

Hi,

thanks,

if the project is periodic_adv and periodic_sync,

# ------------FEM--------------adv-----------------

CONFIG_MPSL_FEM=y

CONFIG_BT_CTLR_TX_PWR_DYNAMIC_CONTROL=n

CONFIG_MPSL_FEM_NRF21540_RX_GAIN_DB=0

CONFIG_MPSL_FEM_NRF21540_TX_GAIN_DB=20

        

# ------------FEM-------------sync-----------------

CONFIG_MPSL_FEM=y

CONFIG_BT_CTLR_TX_PWR_DYNAMIC_CONTROL=n

CONFIG_MPSL_FEM_NRF21540_RX_GAIN_DB=13

CONFIG_MPSL_FEM_NRF21540_TX_GAIN_DB=0

   

i want to set maximum statically only for long rang, is it correct?

   

Best Regards

[Susheel Nuguru]

It looks like periodic advertising is not supported on nRF52 devices. It is supported as an experimental feature on nRF53 based devices.

[yoyou]

Hi,

thanks for reply,

is your means nRF5340DK+nRF21540EK will correct?

  

Best Regards

[Susheel Nuguru]

Hi, 
I got corrected that periodic advertising is supported on nRF52 as it is mentioned in the QDID of bluetooth listing as mentioned here in the "LL (Low Energy Link Layer)" tab.  If you are already using periodic advertising sample for this and still achieve bad range, then it is something that needs debugging. I will have to setup this on my end to see the range. I will do this test tomorrow on my desk. 

[yoyou]

Hi,Susheel Nuguru

thank you very much,

i've test periodic_adv/periodic_sync with two(nRF5340DK+nRF21540EK) or two nRF21540DK.

the rang distance is 60M,  but 

i think it should be able to achieve 150 meters for (2kByte/s data).

so,i want to know how to set maximum statically only for long rang.

  

Best Regards