Sevenstar tracker

This application is intended to be used solely in connection with the Bespoon UWB tracking server and UWB anchors. The screen is green as long as the distance recorded by the UWB server minus a target distance (the delta) is below a threshold. It turns orange when the delta gets above a first threshold and red when it gets above a second threshold. When the screen gets orange or red, the device vibrates and beeps to warn the user. Press the "Set target" button to set the target distance to the current distance measured by the UWB server. Click the "export logs" button at the top right corner to export the internal logs to the device USB storage.