adc noise during advertising or broadcasting

[JoonDong]

I'm using op-amp(LM358), condenser microphone and PCA 10028.

My project collect output values of op-amp and broadcast that.

But, noise was occurred while it is advertising or broadcasting like below.

The below is a screenshot during no advertising or broadcasting.

I set up high pass filter with 220nF capacitor and 1M ohm resistor but, there was no effect like below.

How can I remove this noise?

P.S All of screenshot are captured without noise and I separated ground of op-amp with of PCA10028 using 5 ohm resistor.

P.S I only connected VCC and ground to PCA10028.

[ovrebekk]

Hi

Do you have a PCB schematic and layout that you can share?

Best regards