Can you tell me something about the range
Thanks, this is a very good question!
There is a widespread believe that Bluetooth range is very short and only useful for nearby communications. This was true for old Bluetooth standards but today this important limitation has been completely removed.
With BLE 4.0 the average range has been extended to 30ft (10 m) and this is what I have used for my first prototype.
I am started testing now BLE 5.0 modules. These brand new module extend the range more than 10x ! This means that now we should have almost 1000ft open air range and a very good range also for underground installations!