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]

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 

[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!!!!!!!!!

[americanhoney]

a week later and the reply is that you see a similar thread and assume everything is working so why do I keep asking?????????????????????????? the other thread is about downloading the softdevice and yes, i finally figured out how to do that.  this thread however is related to BLINKY. 

and then your comment with the link to the BLE Central programs???????? i think you are attempting to say "i told you so" but how many of them are named blinky, just one.  PLEASE ASSIGN A DIFFERENT TECH SUPPORT REP TO THIS QUESTION!!!!!!!!!

[Kenneth]

It seems from this thread you have already something working now:
https://devzone.nordicsemi.com/f/nordic-q-a/48117/program-softdevice

Regarding this comment, please check out the link below the comment:

americanhoney said:

additionally there only 1 single central BLE example in nRF5_SDK_15.3.0_59ac345

https://infocenter.nordicsemi.com/topic/com.nordic.infocenter.sdk5.v15.3.0/examples_ble_central.html?cp=5_1_4_2_0 

Also, the following link may be helpful getting started (note the web page in the beginning of the tutorial have changed, but the content itself when working with the SDK is still valid):

https://www.youtube.com/watch?v=YZouRE_Ol8g&list=PLx_tBuQ_KSqGHmzdEL2GWEOeix-S5rgTV

I assume you have first verified working 2pcs of Nordic nRF52-DK here, since that will help getting things setup according the the descriptions in the examples projects for a central and peripheral.

Best regards,
Kenneth

[americanhoney]

I even have a sample of my custom board that is loaded with a program like ble_app_att_mtu_throughput but adapted to work on my board instead of the development kit.  it communicates BLE to the tester (custom board setup as sender) just fine. I connect it to Jflash, read entire chip, then program a different sample of my custom board and it doesnt communicate BLE to the tester.