Problem with communication

RE: Problem with communication

Heratix — Wed, 26 Jun 2019 21:44:48 GMT

I exchanged crystal . Right now is working. Thanks!

RE: Problem with communication

Andreas — Fri, 21 Jun 2019 09:25:08 GMT

Hi,

Yes, nRF52 requires a 32 MHz crystal. No worries, I suppose it is an easy mistake to make if you are used to nRF51. 🙂 The good thing is it should be fairly easy to fix your boards.

Best regards,

Andreas

RE: Problem with communication

Heratix — Thu, 20 Jun 2019 18:57:33 GMT

Thank you for answer Andreas,

In next version I will correct it.

I suppose where is the problem. I put 16MHz crystal instead 32MHz. Previously I was working with nrf51822 and it is reason my mistake.

I apologize for my problem.

I'll write if it's working when I checked it.

Best regards,

Bartek

RE: Problem with communication

Andreas — Tue, 18 Jun 2019 10:59:40 GMT

Hi,

A couple issues:

There are no components for matching the antenna, without it will radiate less energy.
The RF path does not pass over solid ground, instead the SWDIO pad and a thermal relieved GND pad. This might reduce the output power.
Have you made sure the loading caps for the 32MHz crystal are approximately 2*CL - 4 pF, CL being specified for your crystal?

Do you get a connection if you place the phone right next to the board? Do you see any transmission if using the nRF Connect RSSI viewer?

Best regards,

Andreas