Why Experimental_App_Blinky Not detecting in the APP when i use my custom Board?

[vprasath]

Hi Folks,

I'm using the Custom board with nRF52 and temperature sensor .

I'm trying the Experimental_App_Peripheral_Blinky code in the custom Board but i couldn't able to detect it in the phone via nRF connect App and also at the same time i have used central for Development kit where central device could able to connect to my custom Board.

The Same Experimental_App_Peripheral_Blinky i have flashed in Development kit,here i can able to connect.

Why I'm not able to detect it in the APP when it is connecting to the central device?

Thanks and regards,

Vimal

[Mostafa Berg]

Are you sure the firmware isn't asserting? it sounds like it's not advertising.

Any error messages on the terminal ? connect a debugger and share the output so we can help you out

[vprasath]

Thank you for your reply.

I'm pretty much sure that the peripheral is advertising so that the central is able to scan the device and connect to it.once it is connected the LED Blinks.

I'm attaching the Screenshot of the output,there are no error messages.Please check it.

[Mostafa Berg]

I was more interested in the output from the RTT, i'm not the best ad Keil ;)
can you try following that tutorial to get the RTT output and paste it in here instead? it's pretty simple:)

devzone.nordicsemi.com/.../debugging-with-real-time-terminal

[Edvin]

I think it is a good idea to see if the RTT (or UART) logs any errors or asserts. I agree that the blinking led would suggest that the device is advertising, but it could also mean that it encounters an error (when the LED turns on) and then resets.

I see that you use SDK12.3.0. This means that you can turn on the logging using the sdk_config.h file. 

Since you use Keil, you can edit this file using the Configuration Wizard. 

I have marked the changes that I did. If you (download and) open J-Link RTT Viewer, and select your board, you should see the log from all the NRF_LOG_****(); functions.

Try this and see if you see any relevant messages.

This is pretty much what it says in the link from Mostafa.

Also: Do you have an external LF crystal on your custom board?

[vprasath]

Hi Edvin,

I have tried using RTT as you said,i can see there are no error logs.it can able to connect the centraldevice but i couldn't able to detect in the APP.

Yes,i'm using LF crystal on my custom Board.Part no is ABS07-32.768KHZ-T.

What could be the issue be?

Thanks and Regards,

Vimal