How do I use the ACT LED as a Computer power indicator on the PI 3 Model B? So that it turns off when I call
sudo halt once it's ready to be unplugged. Kind of the way a computer has a power light and a AC Power light, and the one lights up whenever it's plugged in and the other one only when the Motherboard is powered on. Does the RPi have this concept?
I found this page: http://www.jeffgeerling.com/blogs/jeff-geerling/controlling-pwr-act-leds-raspberry-pi, however he does not mention the 3B and while the file he refers to contains a bunch of options, which I will look into yet, writing to it has no effect, even though no error is thrown either. The dtparam does seem to work though.