How can I use ble_app_hids_keyboard with multiple centrals?

Question

I am working from the ble_app_hids_keyboard example. To support multiple centrals, I imagine the first step is changing NRF_SDH_BLE_PERIPHERAL_LINK_COUNT and NRF_SDH_BLE_TOTAL_LINK_COUNT . I updated sdk_config.h and changed the default value from 1 to 4. However when I do so, it doesn't even seem to be advertising even for the first device to connect. 
 Is it possible to extend ble_app_hids_keyboard to support multiple devices (and programmatically switch between them)? Is there something else that I'm supposed to change? I am using the nRF52840 Dongle. 
 Thank you for your help.

Edvin · Accepted Answer

Hello, 
 
 I am using the nRF52840 Dongle. 
 I believe that part of the issue is that you are using this dongle, which doesn't have a debugger. It makes it difficult to develop on the dongle by itself. I really recommend you to get an nRF52840 DK. 
 You are probably facing an APP_ERROR_CHECK(err_code); with err_code != 0, but to figure out where that is, you need to either be able to debug, or be able to monitor the logs that are printed with NRF_LOG_INFO(); to see where that happens. If you have the possibility to connect a UART receiver to the dongle, then that may work, but if not, you need a debugger (which is present on the Development Kit, but not the dongle). 
 Even if you find out where this fails by trial and error, you will probably face a lot more issues like this during the development, so some way of monitoring what is happening in the application is crucial for such development. 
 
 Best regards, 
 Edvin

How can I use ble_app_hids_keyboard with multiple centrals?

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