Why do you need IP over airgap? A basic carrier sense scheme with maybe a 44khz fft can ensure atleast a slow speed networking even an arduino with 16kb(or prob

Why do you need IP over airgap? A basic carrier sense scheme with maybe a 44khz fft can ensure atleast a slow speed networking even an arduino with 16kb(or probably even 8kb) flash can do this. This isnt like wifi where you would need complex signal analysis.