To use with Segger embedded studio, navigate to the following path contianing the project file:
Nordic_BLE_Click_Demo\nRF5_SDK_15.0.0_a53641a\examples\ble_peripheral\nrf5-ble-tutorial-characteristic-master\pca10040\s132\ses\nrf52-ble-tutorial-characteristic
The Flutter application loosely corresponds to the following tutorial: https://www.youtube.com/watch?v=s_BTQveXpwY&feature=youtu.be