Disable BLUE LED (Default is 255)
root@MIYOO282:/# echo 0 > /sys/devices/platform/axp22_board/axp22-supplyer.20/subsystem/devices/sunxi-led/leds/led1/brightness
root@MIYOO282:/#
Enable BLUE LED (Default is 255)
root@MIYOO282:/# echo 255 > /sys/devices/platform/axp22_board/axp22-supplyer.20/subsystem/devices/sunxi-led/leds/led1/brightness
root@MIYOO282:/#