We have recently improved the L12 with the new improved antenna LD2412S and they have performed well in testing, so feel free to explore with us.
The main enhancement for the L12 is that the static detection capability continues to be optimized, and for long distances this may perform a little better.
We've also added the professional light sensor BH1750 used on the 2A and LS1.
With these additions this, I think the L13 is a good radar for large spaces.
It's worth noting that one of the key algorithmic differences between the LD2412S and the LD2410 (1U, etc.) is the improved underlying noise reduction algorithm, which uses a new underlying static factor to assist in filtering out interference, which can be triggered in the app by clicking on the Underground Noise Detection, and the whole thing is about the radar module itself detecting and removing a kind of strong interference from the surroundings, which could be a very promising This may be a very potential function. No more need to tweak one by one.