This simple example is preinstalled on the nRF52 Series development kit and demonstrates the default behavior of the development kit after it is powered on for the first time. It involves the reaction of the LEDs to pressing of the buttons and the functioning of the NFC module.

You can find the source code and the project file of the example in the following folder: <InstallFolder>\examples\peripheral\preflash

Testing

Before testing this example, make sure that the NFC antenna is attached to the development kit.

Test the Preflash Example application by performing the following steps:

1. Power on the board. LED 1 starts to blink smoothly.
2. Press any of the buttons on the board to activate the respective LED. For example, after pressing Button 3, LED 3 starts to blink smoothly.
3. Touch the NFC module with a smartphone or a tablet that supports NFC. All LEDs become active for a short moment and the default browser on the device opens the following URL.