I have a development board and load the client central BLE blinky to it, then the peripheral BLE blinky to my custom board and power up and the central development board stays LED 1 on and never switches to LED 2.

[americanhoney]

I have a development board and load the client central BLE blinky to it, then the peripheral BLE blinky to my custom board and power up and the central development board stays LED 1 on and never switches to LED 2.  Any suggestions?

[Kenneth]

Any update on the issue?

Best regards,

Kenneth

[Kenneth]

Did anyone from Nordic review your custom board (schematic and layout)?

[Kenneth]

I suggest to run DTM to test/verify your hardware, e.g.:
https://infocenter.nordicsemi.com/topic/com.nordic.infocenter.sdk5.v15.3.0/ble_sdk_app_dtm_serial.html?cp=5_1_4_5 

This application note may be useful on how to setup DTM:
https://infocenter.nordicsemi.com/topic/struct_appnotes/struct/appnotes_nan34.html?cp=11_3 

A side question: The examples may be logging over UART, so make sure for instance that RXD pin is pulled high. Otherwise I think most of the pins are simple button/led for the blinky example at least.

[americanhoney]

i have a 32G Hz external clock. i will try changing it to internal.

and I do have a setup that works with 2 DK boards.  READ THE COMMENTS!!

[Kenneth]

I added some additional comments to previous replies, please have in mind that based on your case description the problem may be anything, and until you have a setup that you do know works (e.g. 2pcs of nRF52-DK) it is difficult to narrow down to what the problem may be.