nRF52832 custom board scan advertising but not connecting in nRF Connect mobile App

[Rajneesh]

Hello Everyone,

I am working on nRF52832 based custom board and testing the BLE advertising and connection with custom board, custom board adverting but when I am going to connect the custom board it's not connect.

I have tried with different examples like HTS, HRS, ble_app_uart and ble_app_template etc. But custom board doesn't connect with any example code and tried "nRF Connect" and "BLE Scanner" Android application.

Please find attached nRF Connect log and nRF52832 schematic for reference. Here Crystal value is 32MHz

Any help will be appreciated.

Thanks,

Raj

[MartinBL]

Hi,

Have you tried debugging like this to check whether any of the Softdevice functions return any useful errors?

A sniffer trace could also be very valuable here. If you have an extra Nordic development kit you can use our nRF Bluetooth Sniffer solution.

[Rajneesh]

Hi Martin, 

Thanks for the reply.

Please compare nRF52832 DK schematic and above attached nRF52832 custom board schematic there is X2 (crystal, 32.768KHz) is missing.

So, do you think this is the problem to connect the custom board to mobile application?

[Rajneesh]

Hi Martin

Any suggestion on above schematic? 32.768KHz crystal is not connected so this will affect on BLE connection?

[MartinBL]

You don't need a crystal, but if you don't have it you need to change your code a bit. Please see this thread: https://devzone.nordicsemi.com/f/nordic-q-a/25540/is-external-crystal-neccessary-at-all-on-52832/100702#100702.