nRF51822 not working when programmed using ble_app_uart example.

[Linosa]

Hi, Guys, I have problem with my nRF51822. I built the ble_app_uart project in the SDK v6 and and flashed it on the mcu using j-link and I also flashed S110 SoftDevice version 5 to be compatible with the main program. But when I power on the board nothing happens. The ble device is not found in the mobile nrftool software and it does not send anything to the computer via uart. here is something else you should know:

I used SDK V6 because i found that just this SDK has the ble_app_uart for nrrf51822 and other versions like SDK v11 ble_app_uart example is for nrf51422 and nrf52832 and that they are not practical for nrf51822. And i also used S110 SoftDevice v5 to be compatible with that program.

here is ble_app_uart file : 

/cfs-file/__key/support-attachments/beef5d1b77644c448dabff31668f3a47-52004af3d38c4eb6963bf8cb7f430103/ble_5F00_app_5F00_uart.rar

And i connected nrf51822 to computer and j-link as image posted:

 /resized-image/__size/320x240/__key/support-attachments/beef5d1b77644c448dabff31668f3a47-52004af3d38c4eb6963bf8cb7f430103/20180828_5F00_175011.jpg

The white and green color and black wires are uart-usb cable wires, white is Rxd, green is Txd and black is ground. And yellow wires are connected to j-link SWDIO and SWCLK.

Thanks for your attention. I am in hurry so please help sooner. 

[Martin Lesund]

Hi Linosa,

I think you misunderstood something.

I recommend you to get SDKv12.3 since it supports do support nrf51822.

Please find the "ble_app_uart" project in [nRF5_SDK_12.3.0\examples\ble_peripheral\ble_app_uart\pca10028\s130\]

• Compile and flash the application and flash the softdevice

 

You can also flash the precompiled application with the softdevice .hex file found in: [\nRF5_SDK_12.3.0\examples\ble_peripheral\ble_app_uart\hex] 

 

(interesting thread)

[Linosa]

Hi Martin ,Thanks for you reply. but i have tried SDKv12.3 as you told me, but nothing changed, Am i doing something in wrong way? I am confused. I build blinky app and Uart_example and flash on my device and they run as they have to.

So they work on my nrf51822 but I can not  run ble_app_uart on my device?

[Linosa]

Could it be caused because, I don't have DK and just nrf51822 itself? You know i connect the j-link to the device as the picture i have posted, and to connect device to computer by UART, I have set TXD pin, Pin 5 and RXD pin, Pin 6, as shown in picture (but a bit different, in picture TXD is 9 and RXD 11) but no other connection. for example for buttons or LEDs , etc ...

[Linosa]

And i found out that there is another problem to, When I first flash the S130 SD on the nrf51822 and after that i try to flash the main program using Keil, an error occur that says failed to erase. failed to flash and when I tried using nRFgo studio doing that, the error : this file has data in SoftDevice region occurred. I was using the SDKv12.3 that you mentioned above.

[Martin Lesund]

Have you gone through the different links on how to program an application?

[Linosa]

Yes, I actually knew them all, Thanks for you help dear Martin, I tried precompiled application with the SoftDevice in the directory you mentioned and it works nice, So thanks again, but i can not load SoftDevice and main program separately. As i mentioned above So can you please help me to find out what going on when i try to load them separately, should i have  to change the address of where program and SoftDevice load , to not to encounter the error : this file has data in SoftDevice region again? Or i have to update my software? However i think that they are up to date . Or it relates to the firmware of my j-link? Thanks for your attention.