Important: Before you run this example, make sure to program a SoftDevice.
The Heart Rate Application with RTX is a firmware example that shows the cooperation between RTX and the SoftDevice.
The name of the example is ble_app_hrs_rtx_SoftDevice_pca10028, where SoftDevice is the SoftDevice that you are using. If you are not using the Keil Pack Installer, you can find the source code and project file of the example in the following folder: <InstallFolder>\examples\ble_peripheral\ble_app_hrs_rtx
See Heart Rate Application for a detailed description of the example scenario.