code.py

from keyboard import *
import json

keyboard = Keyboard()

CONFIGFILE = "/backlight.json"

___ = TRANSPARENT
SCL = SCROLLLOCK
L1 = LAYER_TAP(1)
LSFT2 = LAYER_MODS(2, MODS(LSHIFT))
RSFT2 = LAYER_MODS(2, MODS(RSHIFT))

keyboard.keymap = (
    # layer 0
    (
        ESC,   1,   2,   3,   4,   5,   6,   7,   8,   9,   0, '-', '=', BACKSPACE,
        TAB,   Q,   W,   E,   R,   T,   Y,   U,   I,   O,   P, '[', ']', '|',
        L1,    A,   S,   D,   F,   G,   H,   J,   K,   L,  ';','"',    ENTER,
        LSFT2, Z,   X,   C,   V,   B,   N,   M, ',', '.', '/',         RSFT2,
        LCTRL, LALT, LGUI,          SPACE,            LEFT, DOWN, UP , RIGHT
    ),

    # layer 1
    (
        '`',    F1,    F2,    F3,    F4,    F5,    F6,    F7,    F8,    F9,   F10,   F11,   F12,   DEL,
        MACRO(0),RGB_MOD,RGB_VAL,___,___,  ___,   ___,   ___,   ___,   ___,PRTSCN,   SCL, PAUSE,INSERT,
        ___,HUE_RGB,VAL_RGB,RGB_HUE, ___,  ___,  LEFT,  DOWN,    UP, RIGHT,   ___,   ___,          ___,
        RSFT2, ___,   ___,   ___,   ___,   ___,   ___,   ___,   ___,   ___,   ___,                CAPS,
        RCTRL,RALT,  RGUI,                        ___,                       HOME,  PGDN,  PGUP,   END
    ),

    # layer 2
    (
        '~', ___, ___, ___, ___, ___, ___, ___, ___, ___, ___, ___, ___, ___,
        ___, ___, ___, ___, ___, ___, ___, ___, ___, ___, ___, ___, ___, ___,
        ___, ___, ___, ___, ___, ___, ___, ___, ___, ___, ___, ___,      ___,
        ___, ___, ___, ___, ___, ___, ___, ___, ___, ___, ___,           ___,
        ___, ___, ___,                ___,               ___, ___, ___,  ___
    ),
)

# Backlight modes
# off: 0
# mono: 1
# gradient: 2
# spectrum: 3
# spectrum_x: 4
# spectrum_y: 5
# elapse: 6
# broadcast: 7
# blackhole: 8
# pinwheel: 9
# beacon: 10
# beacon2: 11


def macro_handler(dev, n, is_down):
    if ( n == 0 and not is_down ):
        backlightConfig["mode"]=keyboard.backlight.mode
        backlightConfig["hue"]=keyboard.backlight.hue
        backlightConfig["val"]=keyboard.backlight.val
        backlightConfig["enabled"]=keyboard.backlight.enabled
        try:
            with open(CONFIGFILE,"w") as backlightJson:
                json.dump(backlightConfig,backlightJson)
        except OSError:
            pass

backlightConfig={}
try:
    with open(CONFIGFILE,"r") as backlightJson:
        backlightConfig=json.load(backlightJson)
except OSError:
    pass
except ValueError:
    pass

keyboard.backlight.set_mode(backlightConfig.get("mode",1))
keyboard.backlight.hue = backlightConfig.get("hue",224)
keyboard.backlight.val = backlightConfig.get("val",4)
keyboard.backlight.enabled = backlightConfig.get("enabled",True)

keyboard.macro_handler = macro_handler
keyboard.verbose = False
keyboard.run()