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by rkangel 3482 days ago
Anything emitting in the 2.4 GHz spectrum has the potential to interfere with Bluetooth. Bluetooth is normally pretty robust to that as it channel hops quite fast so unless you are blatting the whole ISM band, you'll just lose a packet here and there which the system copes with fine.

Plenty of traffic light systems in the UK are wireless - saves digging up bits of road, you just need power. I don't know about Germany.