short range

[Zsolesz]

Hi!

I have more nrf52840 boards with pcb antenna. I would like to ask u. Maximum data change distance with 8dbm tx power is 5-6m . Is it normaly? 

[Andreas]

Hi,

 

Wireless range depends on a lot of factors, but 5-6m sounds quite short. You can make a private case and share your design if you want us to review it.

 

Best regards,

Andreas

[Zsolesz]

We used PTR9818 module: http://abluetech.com/uploads/allimg/190410/APTR9818_EngV1.0.pdf
We dont find design file for this module.
Next step we would like to design new pcb for smartwatch. Can u tell me, where can i find antenna design? Which completed module can work long range?

[Andreas]

Hi,

 

There is a layout recommendation in the datasheet, have you followed that?

 

This module has an integrated antenna, you do not need to add one yourself.

 

Best regards,

Andreas

[Zsolesz]

Hi,
Yes i followed layout recommendation, moreover i solded wire and try it too.
Mobile - device about 8-9m is correct. Device - device 2-3m i think it is very short range.

[Andreas]

Hi,

 

Do you mean you get 8-9m range when connecting your board to a mobile phone, and 2-3m when connecting your board to another (similar) board?

 

Best regards,

Andreas

[Zsolesz]

Hi,
Yes.

[Andreas]

Hi,

 

Well, 8-9m when connecting to your phone is not a whole lot, so if you have similar poor performance in both ends of the link, further reduction is expected. What range do you get if you run the same application on a DK?

 

Best regards,

Andreas