[jeroen94704]

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.

[rjsw]

I did some similar experiments with the original Ericsson Bluetooth development kits and got the same results, BT won over WiFi.