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