Bluetooth antenna of nrf52 DK

[Osildir]

Hi everyone, 

I would like to know in the ble_app_uart_pca10040 where the Bluetooth antenna is connected  on pin planner to be able to change it. 

Thanks you for helping. 

[ketiljo]

The antenna pin is fixed and can not be changed. 

[Osildir]

Ok so "ant" pin is for the ble antenna ?

And do you know where it is write in the code ?

I'm asked about this because I am using nrf52 on a custom board, with an antenna plugged on the 30th pin ("ant") but I can't see the bluetooth signal from this module with my phone.

Do you have any idea ?

Anyway, thanks for your answer :)

[ketiljo]

It doesn't quite work like that, it's connected to the radio inside the device.  Can you post the schematic and layout of your custom board please?

 

[Osildir]

It is a part of the schemamaitc between antenna and nrf52

[ketiljo]

C67 at 100 pF is way to much. Try 0.8 pF as in the reference schematic.

I need to see the layout as well. The part containing the nRF52 and the RF section is enough. 

What's the CL value of your crystal?