Development board nRF52832 with multilink + UART

[Yoann_F]

Hello everybody !

Here I am designing a system with 3 development boards nrf52832, where a card called "central" is connected to the computer by USB and this board will then communicate with the other 2 boards "device" with the code from this this tutorial: github.com/.../custom_ble_service_example.

So, my current problem is that I would like to have my computer communicate with the "central" development board. I then used the code example of the sdk "ble_app_multilink_central" and I added to it the parts of the code "ble_app_uart_c" to initialize the UART. During initialization, I get error 8 with APP_ERROR_CHECK (err_code). As I use the traces NFR_LOG I think that the problem thus comes from that. I would like to know if there is a way to debug (by seeing traces on the COM port). And for example what does it take to use printf? (I use Segger with the Nordic SDK 14.2).

Thank you in advance for your assistance !

[MootSeeker]

Hi Yoann_F, 

do you added the Uart part to the Multilink or some parts of the Multilink to the Uart example? 

[Yoann_F]

Hi !
I added some of the UART to the multilink.

[Yoann_F]

no I use another example to establish a connection, you just need to change the "static char const m_target_periph_name [] =" what you want ";"

Have you added the "nrf_sdh.h" to your project?

[MootSeeker]

Which example you have used? 

[Yoann_F]

ble_app_template with this tutorial : https://github.com/bjornspockeli/custom_ble_service_example

[MootSeeker]

Thanks, I will try it

[MootSeeker]

Hi Yoann_F, 

I've created a programm with your Tutorial and it worked, Thanks!

Now I have the problem on the Central, when I try to compile your code, I've got this error:

  ..\..\..\main.c(130): error: #165: too few arguments in function call  
ret = sd_ble_gap_scan_start(&m_scan_params);
..\..\..\main.c(191): error: #171: invalid type conversion
adv_data.p_data = (uint8_t *)p_gap_evt->params.adv_report.data;
..\..\..\main.c(192): error: #136: struct "<unnamed>" has no field "dlen" 
adv_data.size = p_gap_evt->params.adv_report.dlen;
..\..\..\main.c(220): warning: #181-D: argument is incompatible with corresponding format string conversion
printf("\rFound peripheral %s", (uint32_t)dev_name.p_data);
..\..\..\main.c(261): warning: #224-D: the format string requires additional arguments
printf("Connection 0x%x established, starting DB discovery.");
..\..\..\main.c(283): warning: #223-D: function "ble_conn_state_n_centrals" declared implicitly
if (ble_conn_state_n_centrals() == NRF_SDH_BLE_CENTRAL_LINK_COUNT)
..\..\..\main.c(304): warning: #223-D: function "ble_conn_state_n_centrals" declared implicitly
if (ble_conn_state_n_centrals() == 0)
..\..\..\main.c(590): warning: #177-D: variable "length" was declared but never referenced
uint16_t length = (uint16_t)index;

Do you know how I can fix it ? 

And Thanks for your help