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?

[americanhoney]

the youtube video showing me how to get segger software and build and program?????????? i am way way past that point.  

and no, not 2 DKs . it is apparent you are not reading the details at all.

PLEASE ASSIGN A DIFFERENT TECH SUPPORT REP TO THIS QUESTION!!!!!!!!!

[Kenneth]

So I assume that if you were using 2pcs of nRF52-DK then the examples (blinky or otherwise) works as intended. I would not say that is clear from your description.

If you have found that the problem is in specific related to your own hardware, then ideally the next step I suggest is:

1. Check if you hardware have placed an external 32kHz crystal, if not, you will need to change the LFCLK source to RC (internal) instead of XTAL (external) when init the softdevice.

2. Once that is in place, check if the custom hardware is visible as a BLE beacon:
https://infocenter.nordicsemi.com/topic/com.nordic.infocenter.sdk5.v15.3.0/ble_sdk_app_beacon.html 

[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.

[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 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.