App Developer Sunya Limited addresses the question of Bluetooth troubleshooting by providing a handy Bluetooth scanner app called HomeScan. HomeScan is designed to quickly and easily identify your bluetooth devices, and provide a portable and data driven means of determining signal issues.

While not strictly necessary in an age of voice control and mobile apps, the ability to have a nice, always on dashboard somewhere in the house can be an appealing addition to any smart home. Such a dashboard needs to provide an at-a-glance view of the status of key devices, sensor data, and provide the ability to control aspects of the home conveniently.  

Fing is billed as a 'super-fast network scanner', and that's pretty much what it does, at least originally. Fing itself offers network scanning of the local subnet, device port scanning, and connectivity testing to local or remote addresses.