NRF8001 module connection problem

[tilitililili]

Hi to all!

I've developed a board with NRF8001 on it and it works fine. But I've noticed a strange behavior. I use a mobile phone with NRF master control panel to work with my device. If the distance between the board and the phone is 0-10 centimeters the board can be discovered by the application. If the distance is 10 - 100 centimeters it cannot be discovered. But if the distance is larger (up to 30 meters) the board can also be discovered.

So, I have an area around the mobile phone (10-100 cm), where the connection can't be established. What can be the reason of such a behavior?

Thank you in advance!

[Øyvind Karlsen]

Hi,

How are you testing this?

Could you submit your layout?

[tilitililili]

Here is the layout screenshot - drive.google.com/open I'm testing the connection with NRF control panel application on my phone.

[Øyvind Karlsen]

Is there any reason that the track to pin 15 is cut?

What environment are you seeing this in?

[tilitililili]

Pin 15 is unconnected, and this "track' is a part of the ground polygon.

[Øyvind Karlsen]

Does the same thing happen to all the boards or just the one?

What kind of RSSI values are you seeing in 0-10 cm and beyond 100 cm?