I am currently in the process of developing a BT based embedded system, and in my experience Bluetooth is extremely resilient to the crowded 2.4 GHz space. It has very good and fast frequency hopping, so it maintains a connection even in the presence of several WiFi access points covering all but a small portion of the 2.4 GHz band. We ran a test in our office which has many access points and laptops/phones, and even an alarm system that uses 2.4 GHz. At a distance of 10m between central and peripheral (with several dry-walls in between) we didn't lose a single bit over a full week of continuous data transmission at several 100 kbit/s.
There are limits of course. At some point the 2.4 GHz band is so saturated nothing low power gets through. But so far, I am pleasantly surprised by the reliability.
All this was done using BT 4.2 though, so maybe that helps.
There are limits of course. At some point the 2.4 GHz band is so saturated nothing low power gets through. But so far, I am pleasantly surprised by the reliability.
All this was done using BT 4.2 though, so maybe that helps.