Brendan Gregg did something similar for wifi signal strength with bpf. https://www.brendangregg.com/blog/2019-12-22/bpf-theremin.html https://www.brendangregg.

Brendan Gregg did something similar for wifi signal strength with bpf. https://www.brendangregg.com/blog/2019-12-22/bpf-theremin.html https://www.brendangregg.com/blog/2019-12-22/bpf-theremin.ht...