power LED, status LED

led0 : status LED (green)

led1 : power LED (red)

cat /sys/class/leds/led0/trigger

[none] rc-feedback kbd-scrolllock kbd-numlock kbd-capslock kbd-kanalock kbd-shiftlock kbd-altgrlock kbd-ctrllock kbd-altlock kbd-shiftllock kbd-shiftrlock kbd-ctrlllock kbd-ctrlrlock timer oneshot heartbeat backlight gpio cpu cpu0 cpu1 cpu2 cpu3 default-on input panic mmc1 mmc0 rfkill-any rfkill0 rfkill1

sudo sh -c "echo none > /sys/class/leds/led0/trigger"

sudo sh -c "echo heartbeat > /sys/class/leds/led0/trigger"
sudo sh -c "echo mmc0 > /sys/class/leds/led0/trigger"
sudo sh -c "echo cpu > /sys/class/leds/led0/trigger"

In /boot/config.txt:

# turn power LED into heartbeat
dtparam=pwr_led_trigger=heartbeat
# turn off the green LED
dtparam=act_led_trigger=none