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Huh I didn't know about that. Seems like it uses 8 symbols per bit to increase the range (but I would very seriously doubt you ever get close to 1km except in super ideal "both in a field in the middle of nowhere" scenarios that never actually happen.

Apparently it's an optional part of Bluetooth 5, so not necessarily supported. However I just checked my phone (Pixel 8) and it is supported. You can check in the nRF Connect app.

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It falls quite close to the "super ideal scenarios" you described, but Nordic did a real world test and got a range of 1300 m using coded phy.

https://devzone.nordicsemi.com/nordic/nordic-blog/b/blog/pos...

Interesting, so it roughly doubles the range. So we might be looking at like 50-100 m in the real world I guess.

Regular Bluetooth already has 100 m of range, at least for class 1 devices like most Apple devices. (Many older/non-Apple devices are class 2, which only does roughly 10 m. Very noticeable difference in an office environment using headphones.)

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