Poking around on my Archer C7 v2, I can get the "Sun" and the "Yin-Yang" LEDs to respond very quickly, such as to incoming traffic on a specific interface.
However, the five LEDs that are associated with the switch ports seem to have a "blinker" behind them that masks/ands with the trigger so that, for example, the fine level of detail that I can see on the yin-yang light is lost.
Before I dive down to the GPIO driver level, is this a "feature" of these five LEDs, perhaps as they are driven by the switch chip itself?
Looks like even writing directly to
none) is "masked" as well. The following Python 3 script (to get sub-second delay) shows the "writes" happening quickly with an argument of 0.1, but the light still flashes slowly and irregularly, "skipping a beat" every 4 or 5 blinks (which are happening about once a second).
delay = float(sys.argv)
os.system("echo 0 > brightness")
os.system("echo 255 > brightness")