Overall, produce a tool that will measure BlueTooth signal strength between an iPhone and and iPad, display the relative signal strength on the displays of each device, provide a method for setting a minimum signal strength value, and provide audio and visual alerts.
The tool must update the display once per second.
The tool must display a relative signal strength value of the paired device. How this value is obtained is TBD. (Bluetooth LE RSSI is an option)
The tool must run in backgrounds mode (UIBackgorundModes)
The tool must have the ability to set a minimum signal strength limit on the received signal.
The tool must provide an audible alert when the received signal strength decreases below the setting threshold.
The tool must provide a visual alert when the received signal strength decreases below the setting threshold.