[Keyboard] Move Handwired K552 into my folder name (#15973)

23 files changed, 1505 insertions, 0 deletions

diff --git a/keyboards/horrortroll/handwired_k552/keymaps/default/keymap.c b/keyboards/horrortroll/handwired_k552/keymaps/default/keymap.c
new file mode 100644
index 0000000000..641e0e5381
--- /dev/null
+++ b/keyboards/horrortroll/handwired_k552/keymaps/default/keymap.c
@@ -0,0 +1,98 @@
+/* Copyright 2021 HorrorTroll <https://github.com/HorrorTroll>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include QMK_KEYBOARD_H
+
+#include "keymap_stuff.h"
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+
+/*
+       ┌───┐   ┌───┬───┬───┬───┐ ┌───┬───┬───┬───┐ ┌───┬───┬───┬───┐ ┌───┬───┬───┐
+       │Esc│   │F1 │F2 │F3 │F4 │ │F5 │F6 │F7 │F8 │ │F9 │F10│F11│F12│ │PSc│Scr│Pse│
+       └───┘   └───┴───┴───┴───┘ └───┴───┴───┴───┘ └───┴───┴───┴───┘ └───┴───┴───┘
+       ┌───┬───┬───┬───┬───┬───┬───┬───┬───┬───┬───┬───┬───┬───────┐ ┌───┬───┬───┐
+       │ ` │ 1 │ 2 │ 3 │ 4 │ 5 │ 6 │ 7 │ 8 │ 9 │ 0 │ - │ = │ Backsp│ │Ins│Hom│PgU│
+       ├───┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─────┤ ├───┼───┼───┤
+       │ Tab │ q │ w │ e │ r │ t │ y │ u │ i │ o │ p │ [ │ ] │  \  │ │Del│End│PgD│
+       ├─────┴┬──┴┬──┴┬──┴┬──┴┬──┴┬──┴┬──┴┬──┴┬──┴┬──┴┬──┴┬──┴─────┤ └───┴───┴───┘
+       │ Caps │ a │ s │ d │ f │ g │ h │ j │ k │ l │ ; │ ' │  Enter │
+       ├──────┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴────────┤     ┌───┐
+       │ LShift │ z │ x │ c │ v │ b │ n │ m │ , │ . │ / │   RShift │     │ ↑ │
+       ├────┬───┴┬──┴─┬─┴───┴───┴───┴───┴───┴──┬┴───┼───┴┬────┬────┤ ┌───┼───┼───┐
+       │LCrl│GUI │LAlt│         Space          │RAlt│ Fn │ App│RCrl│ │ ← │ ↓ │ → │
+       └────┴────┴────┴────────────────────────┴────┴────┴────┴────┘ └───┴───┴───┘
+       ┌───┐   ┌───┬───┬───┬───┐ ┌───┬───┬───┬───┐ ┌───┬───┬───┬───┐ ┌───┬───┬───┐
+       │   │   │   │   │   │   │ │   │   │   │   │ │   │   │   │   │ │   │   │   │
+       └───┘   └───┴───┴───┴───┘ └───┴───┴───┴───┘ └───┴───┴───┴───┘ └───┴───┴───┘
+       ┌───┬───┬───┬───┬───┬───┬───┬───┬───┬───┬───┬───┬───┬───────┐ ┌───┬───┬───┐
+       │ ~ │ ! │ @ │ # │ $ │ % │ ^ │ & │ * │ ( │ ) │ _ │ + │       │ │   │   │   │
+       ├───┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─────┤ ├───┼───┼───┤
+       │     │ Q │ W │ E │ R │ T │ Y │ U │ I │ O │ P │ { │ } │  |  │ │   │   │   │
+       ├─────┴┬──┴┬──┴┬──┴┬──┴┬──┴┬──┴┬──┴┬──┴┬──┴┬──┴┬──┴┬──┴─────┤ └───┴───┴───┘
+       │ Caps │ A │ S │ D │ F │ G │ H │ J │ K │ L │ : │ " │        │
+       ├──────┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴────────┤     ┌───┐
+       │ LShift │ Z │ X │ C │ V │ B │ N │ M │ < │ > │ ? │   RShift │     │   │
+       ├────┬───┴┬──┴─┬─┴───┴───┴───┴───┴───┴──┬┴───┼───┴┬────┬────┤ ┌───┼───┼───┐
+       │    │    │    │                        │    │    │    │    │ │   │   │   │
+       └────┴────┴────┴────────────────────────┴────┴────┴────┴────┘ └───┴───┴───┘
+*/
+    /*  Row:    0        1        2        3        4        5        6        7        8        9        10       11       12       13       14       15        16      */
+    [_BASE] = LAYOUT_tkl_ansi(
+                KC_ESC,  KC_F1,   KC_F2,   KC_F3,   KC_F4,   KC_F5,   KC_F6,   KC_F7,   KC_F8,   KC_F9,   KC_F10,  KC_F11,  KC_F12,           KC_PSCR, KC_SLCK,  KC_PAUSE,
+                KC_GRV,  KC_1,    KC_2,    KC_3,    KC_4,    KC_5,    KC_6,    KC_7,    KC_8,    KC_9,    KC_0,    KC_MINS, KC_EQL,  KC_BSPC, KC_INS,  KC_HOME,  KC_PGUP,
+                KC_TAB,  KC_Q,    KC_W,    KC_E,    KC_R,    KC_T,    KC_Y,    KC_U,    KC_I,    KC_O,    KC_P,    KC_LBRC, KC_RBRC, KC_BSLS, KC_DEL,  KC_END,   KC_PGDN,
+                KC_CAPS, KC_A,    KC_S,    KC_D,    KC_F,    KC_G,    KC_H,    KC_J,    KC_K,    KC_L,    KC_SCLN, KC_QUOT,          KC_ENT,
+                KC_LSFT,          KC_Z,    KC_X,    KC_C,    KC_V,    KC_B,    KC_N,    KC_M,    KC_COMM, KC_DOT,  KC_SLSH,          KC_RSFT,          KC_UP,
+                KC_LCTL, KC_LGUI, KC_LALT, KC_SPC,  KC_RALT, MO(_FN), KC_APP,           KC_RCTL,                                              KC_LEFT, KC_DOWN,  KC_RIGHT
+            ),
+
+    /*  Row:    0        1        2        3        4        5        6        7        8        9        10       11       12       13       14       15        16     */
+    [_WAVE] = LAYOUT_tkl_ansi(
+                KC_ESC,  KC_F1,   KC_F2,   KC_F3,   KC_F4,   KC_F5,   KC_F6,   KC_F7,   KC_F8,   KC_F9,   KC_F10,  KC_F11,  KC_F12,           KC_PSCR, KC_SLCK,  KC_PAUSE,
+                KC_GRV,  KC_1,    KC_2,    KC_3,    KC_4,    KC_5,    KC_6,    KC_7,    KC_8,    KC_9,    KC_0,    KC_MINS, KC_EQL,  KC_BSPC, KC_INS,  KC_HOME,  KC_PGUP,
+                KC_TAB,  KC_Q,    KC_W,    KC_E,    KC_R,    KC_T,    KC_Y,    KC_U,    KC_I,    KC_O,    KC_P,    KC_LBRC, KC_RBRC, KC_BSLS, KC_DEL,  KC_END,   KC_PGDN,
+                KC_CAPS, KC_A,    KC_S,    KC_D,    KC_F,    KC_G,    KC_H,    KC_J,    KC_K,    KC_L,    KC_SCLN, KC_QUOT,          KC_ENT,
+                KC_LSFT,          KC_Z,    KC_X,    KC_C,    KC_V,    KC_B,    KC_N,    KC_M,    KC_COMM, KC_DOT,  KC_SLSH,          KC_RSFT,          KC_UP,
+                KC_LCTL, KC_LGUI, KC_LALT, KC_SPC,  KC_RALT, MO(_FN), KC_APP,           KC_RCTL,                                              KC_LEFT, KC_DOWN,  KC_RIGHT
+            ),
+
+/*
+       ┌───┐   ┌───┬───┬───┬───┐ ┌───┬───┬───┬───┐ ┌───┬───┬───┬───┐ ┌───┬───┬───┐
+       │Rst│   │MeP│VoD│VoU│Mut│ │Stp│Prv│Ply│Nxt│ │Mai│Hom│Cal│Sch│ │Rod│Mod│Tog│
+       └───┘   └───┴───┴───┴───┘ └───┴───┴───┴───┘ └───┴───┴───┴───┘ └───┴───┴───┘
+       ┌───┬───┬───┬───┬───┬───┬───┬───┬───┬───┬───┬───┬───┬───────┐ ┌───┬───┬───┐
+       │   │   │   │   │   │   │   │   │   │   │   │Spd│Spi│       │ │C_E│   │   │
+       ├───┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─────┤ ├───┼───┼───┤
+       │     │1Hd│1Hi│1Sd│1Si│1Vd│1Vi│   │   │   │   │   │   │     │ │   │   │Wve│
+       ├─────┴┬──┴┬──┴┬──┴┬──┴┬──┴┬──┴┬──┴┬──┴┬──┴┬──┴┬──┴┬──┴─────┤ └───┴───┴───┘
+       │      │2Hd│2Hi│2Sd│2Si│2Vd│2Vi│   │   │   │   │   │        │
+       ├──────┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴────────┤     ┌───┐
+       │        │   │Pre│Ref│Flp│   │   │   │   │   │   │          │     │Vai│
+       ├────┬───┴┬──┴─┬─┴───┴───┴───┴───┴───┴──┬┴───┼───┴┬────┬────┤ ┌───┼───┼───┐
+       │    │    │    │                        │    │ Fn │    │    │ │Hud│Vad│Hui│
+       └────┴────┴────┴────────────────────────┴────┴────┴────┴────┘ └───┴───┴───┘
+*/
+    /*  Row:    0        1        2        3        4        5        6        7        8        9        10       11       12       13       14       15        16     */
+    [_FN]   = LAYOUT_tkl_ansi(
+                RESET,   KC_MSEL, KC_VOLD, KC_VOLU, KC_MUTE, KC_MSTP, KC_MPRV, KC_MPLY, KC_MNXT, KC_MAIL, KC_WHOM, KC_CALC, KC_WSCH,          RGB_RMOD, RGB_MOD, RGB_TOG,
+                NK_TOGG, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, RGB_SPD, RGB_SPI, _______, RGB_C_E,  _______, _______,
+                _______, G1_HUD,  G1_HUI,  G1_SAD,  G1_SAI,  G1_VAD,  G1_VAI,  _______, _______, _______, _______, _______, _______, _______, _______,  _______, TG(_WAVE),
+                _______, G2_HUD,  G2_HUI,  G2_SAD,  G2_SAI,  G2_VAD,  G2_VAI,  _______, _______, _______, _______, _______,          _______,
+                _______,          G_PRE,   REF_G,   G_FLIP,  _______, _______, _______, _______, _______, _______, _______,          _______,           RGB_VAI,
+                _______, _______, _______, _______, _______, _______, _______,          _______,                                              RGB_HUD,  RGB_VAD, RGB_HUI
+            ),
+};
diff --git a/keyboards/horrortroll/handwired_k552/keymaps/default/keymap_stuff.h b/keyboards/horrortroll/handwired_k552/keymaps/default/keymap_stuff.h
new file mode 100644
index 0000000000..a97b46e5e4
--- /dev/null
+++ b/keyboards/horrortroll/handwired_k552/keymaps/default/keymap_stuff.h
@@ -0,0 +1,300 @@
+/* Copyright 2021 HorrorTroll <https://github.com/HorrorTroll>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <string.h>
+#include <math.h>
+
+#include <lib/lib8tion/lib8tion.h>
+
+#include "oled/oled_stuff.h"
+
+// Each layer gets a name for readability, which is then used in the keymap matrix below.
+// The underscores don't mean anything - you can have a layer called STUFF or any other name.
+// Layer names don't all need to be of the same length, obviously, and you can also skip them
+// entirely and just use numbers.
+
+enum layer_names {
+    _BASE = 0,
+    _WAVE = 1,
+    _FN = 2
+};
+
+// For CUSTOM_GRADIENT
+HSV gradient_0          = {205, 250, 255};
+HSV gradient_100        = {140, 215, 125};
+bool reflected_gradient = false;
+uint8_t gp_i            = 0;
+
+typedef struct {
+    HSV gradient_0;
+    HSV gradient_1;
+    bool reflected;
+} CUSTOM_PRESETS;
+
+enum user_rgb_mode {
+    RGB_MODE_ALL,
+    RGB_MODE_NONE,
+};
+
+typedef union {
+    uint32_t raw;
+    struct {
+        uint8_t rgb_mode :8;
+    };
+} user_config_t;
+
+user_config_t user_config;
+
+enum layer_keycodes {
+    //Custom Gradient control keycode
+    G1_HUI = SAFE_RANGE, //Custom gradient color 1 hue increase
+    G1_HUD,              //Custom gradient color 1 hue decrease
+    G1_SAI,              //Custom gradient color 1 saturation increase
+    G1_SAD,              //Custom gradient color 1 saturation decrease
+    G1_VAI,              //Custom gradient color 1 value increase
+    G1_VAD,              //Custom gradient color 1 value decrease
+    G2_HUI,              //Custom gradient color 2 hue increase
+    G2_HUD,              //Custom gradient color 2 hue decrease
+    G2_SAI,              //Custom gradient color 2 saturation increase
+    G2_SAD,              //Custom gradient color 2 saturation decrease
+    G2_VAI,              //Custom gradient color 2 value increase
+    G2_VAD,              //Custom gradient color 2 value decrease
+    G_PRE,               //Gradient presets
+    REF_G,               //Toggle between linear and reflected gradient
+    G_FLIP,              //Flip the gradient colors
+  
+    //Custom led effect keycode
+    RGB_C_E,             //Cycle user effect
+};
+
+void keyboard_post_init_user(void) {
+    user_config.raw = eeconfig_read_user();
+    switch (user_config.rgb_mode) {
+        case RGB_MODE_ALL:
+            rgb_matrix_set_flags(LED_FLAG_ALL);
+            rgb_matrix_enable_noeeprom();
+            break;
+        case RGB_MODE_NONE:
+            rgb_matrix_set_flags(LED_FLAG_NONE);
+            rgb_matrix_set_color_all(0, 0, 0);
+            break;
+    }
+}
+
+bool process_record_user(uint16_t keycode, keyrecord_t *record) {
+    process_record_user_oled(keycode, record);
+
+    uint8_t color_adj_step = 5;
+
+    CUSTOM_PRESETS gradient_presets[] = {
+    {{41 , 255, 255}, {233, 245, 255}, false },
+    {{45 , 245, 155}, {160, 255,  80}, false },
+    {{173, 245,  40}, {41 , 255, 205}, true  },
+    {{32 , 255, 165}, {217, 185,  70}, false },
+    {{240, 255, 145}, {115, 255, 245}, true  },
+    {{118, 255, 255}, {242, 255, 255}, false },
+    {{212,  0 ,   0}, {223, 235, 165}, true  },
+    {{205, 250, 255}, {140, 215, 125}, false },
+    };
+
+    uint8_t gp_length = sizeof(gradient_presets)/sizeof(gradient_presets[0]);
+
+    switch (keycode) {
+        case G1_HUI:
+            if (record->event.pressed) {
+                gradient_0.h += color_adj_step;
+                dprintf("Gradient 0 HSV: %d, %d, %d\n", gradient_0.h, gradient_0.s, gradient_0.v);
+            }
+            return false;
+        case G1_HUD:
+            if (record->event.pressed) {
+                gradient_0.h -= color_adj_step;
+                dprintf("Gradient 0 HSV: %d, %d, %d\n", gradient_0.h, gradient_0.s, gradient_0.v);
+            }
+            return false;
+        case G1_SAI:
+            if (record->event.pressed) {
+                gradient_0.s = (gradient_0.s + color_adj_step * 2 <= 255) ? gradient_0.s + color_adj_step * 2 : 255;
+                dprintf("Gradient 0 HSV: %d, %d, %d\n", gradient_0.h, gradient_0.s, gradient_0.v);
+            }
+            return false;
+        case G1_SAD:
+            if (record->event.pressed) {
+                gradient_0.s = (gradient_0.s - color_adj_step * 2 >= 0) ? gradient_0.s - color_adj_step * 2 : 0;
+                dprintf("Gradient 0 HSV: %d, %d, %d\n", gradient_0.h, gradient_0.s, gradient_0.v);
+            }
+            return false;
+        case G1_VAI:
+            if (record->event.pressed) {
+                gradient_0.v = (gradient_0.v + color_adj_step * 2 <= 255) ? gradient_0.v + color_adj_step * 2 : 255;
+                dprintf("Gradient 0 HSV: %d, %d, %d\n", gradient_0.h, gradient_0.s, gradient_0.v);
+            }
+            return false;
+        case G1_VAD:
+            if (record->event.pressed) {
+                gradient_0.v = (gradient_0.v - color_adj_step * 2 >= 0) ? gradient_0.v - color_adj_step * 2 : 0;
+                dprintf("Gradient 0 HSV: %d, %d, %d\n", gradient_0.h, gradient_0.s, gradient_0.v);
+            }
+            return false;
+        case G2_HUI:
+            if (record->event.pressed) {
+                gradient_100.h += color_adj_step;
+                dprintf("Gradient 100 HSV: %d, %d, %d\n", gradient_100.h, gradient_100.s, gradient_100.v);
+            }
+            return false;
+        case G2_HUD:
+            if (record->event.pressed) {
+                gradient_100.h -= color_adj_step;
+                dprintf("Gradient 100 HSV: %d, %d, %d\n", gradient_100.h, gradient_100.s, gradient_100.v);
+            }
+            return false;
+        case G2_SAI:
+            if (record->event.pressed) {
+                gradient_100.s = (gradient_100.s + color_adj_step * 2 <= 255) ? gradient_100.s + color_adj_step * 2 : 255;
+                dprintf("Gradient 100 HSV: %d, %d, %d\n", gradient_100.h, gradient_100.s, gradient_100.v);
+            }
+            return false;
+        case G2_SAD:
+            if (record->event.pressed) {
+                gradient_100.s = (gradient_100.s - color_adj_step * 2 >= 0) ? gradient_100.s - color_adj_step * 2 : 0;
+                dprintf("Gradient 100 HSV: %d, %d, %d\n", gradient_100.h, gradient_100.s, gradient_100.v);
+            }
+            return false;
+        case G2_VAI:
+            if (record->event.pressed) {
+                gradient_100.v = (gradient_100.v + color_adj_step * 2 <= 255) ? gradient_100.v + color_adj_step * 2 : 255;
+                dprintf("Gradient 100 HSV: %d, %d, %d\n", gradient_100.h, gradient_100.s, gradient_100.v);
+            }
+            return false;
+        case G2_VAD:
+            if (record->event.pressed) {
+                gradient_100.v = (gradient_100.v - color_adj_step * 2 >= 0) ? gradient_100.v - color_adj_step * 2 : 0;
+                dprintf("Gradient 100 HSV: %d, %d, %d\n", gradient_100.h, gradient_100.s, gradient_100.v);
+            }
+            return false;
+        case G_PRE:
+            if (record->event.pressed) {
+                gp_i = (gp_i + gp_length ) % gp_length;
+
+                gradient_0 = gradient_presets[gp_i].gradient_0;
+                gradient_100 = gradient_presets[gp_i].gradient_1;
+                reflected_gradient = gradient_presets[gp_i].reflected;
+
+                gp_i += 1;
+            }
+            return false;
+        case REF_G:
+            if (record->event.pressed) {
+                reflected_gradient = !reflected_gradient;
+            }
+            return false;
+        case G_FLIP:
+            if (record->event.pressed) {
+                HSV temp_color = gradient_0;
+                gradient_0 = gradient_100;
+                gradient_100 = temp_color;
+            }
+            return false;
+        case RGB_C_E:
+            if (record->event.pressed) {
+                switch (rgb_matrix_get_mode()) {
+                    case RGB_MATRIX_CUSTOM_CUSTOM_GRADIENT:
+                        rgb_matrix_mode(RGB_MATRIX_CUSTOM_DIAGONAL);
+                        return false;
+                    case RGB_MATRIX_CUSTOM_DIAGONAL:
+                        rgb_matrix_mode(RGB_MATRIX_CUSTOM_COOL_DIAGONAL);
+                        return false;
+                    case RGB_MATRIX_CUSTOM_COOL_DIAGONAL:
+                        rgb_matrix_mode(RGB_MATRIX_CUSTOM_KITT);
+                        return false;
+                    case RGB_MATRIX_CUSTOM_KITT:
+                        rgb_matrix_mode(RGB_MATRIX_CUSTOM_RANDOM_BREATH_RAINBOW);
+                        return false;
+                    default:
+                        rgb_matrix_mode(RGB_MATRIX_CUSTOM_CUSTOM_GRADIENT);
+                        return false;
+                }
+            }
+            return false;
+        case RGB_TOG:
+            if (record->event.pressed) {
+                switch (rgb_matrix_get_flags()) {
+                    case LED_FLAG_ALL: {
+                        rgb_matrix_set_flags(LED_FLAG_NONE);
+                        rgb_matrix_set_color_all(0, 0, 0);
+                        user_config.rgb_mode = RGB_MODE_NONE;
+                    }
+                    break;
+                    default: {
+                        rgb_matrix_set_flags(LED_FLAG_ALL);
+                        rgb_matrix_enable_noeeprom();
+                        user_config.rgb_mode = RGB_MODE_ALL;
+                    }
+                    break;
+                }
+                eeconfig_update_user(user_config.raw);
+            }
+            return false;
+	}
+    return true;
+}
+
+void rgb_matrix_indicators_user(void) {
+    uint8_t  side_leds_left[3]  = {17, 18, 19};
+    uint8_t  side_leds_right[3] = { 4,  5,  6};
+    HSV      hsv = rgb_matrix_config.hsv;
+    uint8_t time = scale16by8(g_rgb_timer, qadd8(32, 1));
+    hsv.h        = time;
+    RGB      rgb = hsv_to_rgb(hsv);
+
+    if ((rgb_matrix_get_flags() & LED_FLAG_ALL)) {
+        if (host_keyboard_led_state().caps_lock) {
+            for (uint8_t i = 0; i < 3; i++)
+            {
+                rgb_matrix_set_color(side_leds_left[i], rgb.r, rgb.g, rgb.b);
+            }
+        }
+        if (host_keyboard_led_state().scroll_lock) {
+            for (uint8_t i = 0; i < 3; i++)
+            {
+                rgb_matrix_set_color(side_leds_right[i], rgb.r, rgb.g, rgb.b);
+            }
+        }
+    } else {
+        if (host_keyboard_led_state().caps_lock) {
+            for (uint8_t i = 0; i < 3; i++)
+            {
+                rgb_matrix_set_color(side_leds_left[i], rgb.r, rgb.g, rgb.b);
+            }
+        } else {
+            for (uint8_t i = 0; i < 3; i++)
+            {
+                rgb_matrix_set_color(side_leds_left[i], 0, 0, 0);
+            }
+        }
+        if (host_keyboard_led_state().scroll_lock) {
+            for (uint8_t i = 0; i < 3; i++)
+            {
+                rgb_matrix_set_color(side_leds_right[i], rgb.r, rgb.g, rgb.b);
+            }
+        } else {
+            for (uint8_t i = 0; i < 3; i++)
+            {
+                rgb_matrix_set_color(side_leds_right[i], 0, 0, 0);
+            }
+        }
+    }
+}
diff --git a/keyboards/horrortroll/handwired_k552/keymaps/default/led/cool_diagonal.c b/keyboards/horrortroll/handwired_k552/keymaps/default/led/cool_diagonal.c
new file mode 100644
index 0000000000..2c518a5431
--- /dev/null
+++ b/keyboards/horrortroll/handwired_k552/keymaps/default/led/cool_diagonal.c
@@ -0,0 +1,22 @@
+/* Copyright 2021 HorrorTroll <https://github.com/HorrorTroll>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+static HSV COOL_DIAGONAL_math(HSV hsv, uint8_t i, uint8_t time) {
+    hsv.h = (g_led_config.point[i].x / 4) - g_led_config.point[i].y - time;
+    return hsv;
+}
+
+bool COOL_DIAGONAL(effect_params_t* params) { return effect_runner_i(params, &COOL_DIAGONAL_math); }
\ No newline at end of file
diff --git a/keyboards/horrortroll/handwired_k552/keymaps/default/led/custom_gradient.c b/keyboards/horrortroll/handwired_k552/keymaps/default/led/custom_gradient.c
new file mode 100644
index 0000000000..49e4a242fb
--- /dev/null
+++ b/keyboards/horrortroll/handwired_k552/keymaps/default/led/custom_gradient.c
@@ -0,0 +1,74 @@
+/* Copyright 2021 HorrorTroll <https://github.com/HorrorTroll>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+extern HSV gradient_0;
+extern HSV gradient_100;
+extern bool reflected_gradient;
+
+static HSV INTERPOLATE_HSV(float step, HSV gradient_0, HSV gradient_100) {
+    uint8_t cw, ccw;
+    HSV color;
+
+    cw = (gradient_0.h >= gradient_100.h) ? 255 + gradient_100.h - gradient_0.h : gradient_100.h - gradient_0.h;  // Hue range is 0 to 255.
+    ccw = (gradient_0.h >= gradient_100.h) ? gradient_0.h - gradient_100.h : 255 + gradient_0.h - gradient_100.h;
+
+    if( cw < ccw ) { // going clockwise
+        color.h = gradient_0.h + (uint8_t)(step * cw);
+    } else { // Going counter clockwise
+        color.h = gradient_0.h - (uint8_t)(step * ccw);
+    }
+
+    color.s = gradient_0.s + step * (gradient_100.s - gradient_0.s);
+
+    // Scale V with global RGB Matrix's V, so users can still control overall brightness with RGB_VAI & RGB_VAD0
+    color.v = round((gradient_0.v + step * (gradient_100.v - gradient_0.v)) * ((float)rgb_matrix_config.hsv.v / 255));
+
+    return color;
+}
+
+static HSV CUSTOM_GRADIENT_math(uint8_t led_x, uint8_t min_x, uint8_t max_x) {
+    float step = (float)led_x / (max_x - min_x);
+    float mid_gradient_pos = 0.5;
+
+    if( reflected_gradient ) {
+        if( step <= mid_gradient_pos ) {
+            return INTERPOLATE_HSV(step * (1/mid_gradient_pos), gradient_0, gradient_100);
+        } else {
+            return INTERPOLATE_HSV((step - mid_gradient_pos) * (1/(1-mid_gradient_pos)), gradient_100, gradient_0);
+        }
+
+    } else {
+        return INTERPOLATE_HSV(step, gradient_0, gradient_100);
+    }
+}
+
+static bool CUSTOM_GRADIENT(effect_params_t* params) {
+    RGB_MATRIX_USE_LIMITS(led_min, led_max);
+
+    uint8_t min_x = 0;  // X coordinate of the left-most LED
+    uint8_t max_x = 224; // X coordinate of the right-most LED
+
+    for (uint8_t i = led_min; i < led_max; i++) {
+        RGB_MATRIX_TEST_LED_FLAGS();
+
+        HSV hsv_orig = CUSTOM_GRADIENT_math(g_led_config.point[i].x, min_x, max_x);
+        RGB rgb = hsv_to_rgb(hsv_orig);
+
+        rgb_matrix_set_color(i, rgb.r, rgb.g, rgb.b);
+    }
+
+    return led_max < DRIVER_LED_TOTAL;
+}
diff --git a/keyboards/horrortroll/handwired_k552/keymaps/default/led/diagonal.c b/keyboards/horrortroll/handwired_k552/keymaps/default/led/diagonal.c
new file mode 100644
index 0000000000..19e3791bd6
--- /dev/null
+++ b/keyboards/horrortroll/handwired_k552/keymaps/default/led/diagonal.c
@@ -0,0 +1,22 @@
+/* Copyright 2021 HorrorTroll <https://github.com/HorrorTroll>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+static HSV DIAGONAL_math(HSV hsv, uint8_t i, uint8_t time) {
+    hsv.h = g_led_config.point[i].x - g_led_config.point[i].y - time;
+    return hsv;
+}
+
+bool DIAGONAL(effect_params_t* params) { return effect_runner_i(params, &DIAGONAL_math); }
diff --git a/keyboards/horrortroll/handwired_k552/keymaps/default/led/kitt.c b/keyboards/horrortroll/handwired_k552/keymaps/default/led/kitt.c
new file mode 100644
index 0000000000..823eb5839b
--- /dev/null
+++ b/keyboards/horrortroll/handwired_k552/keymaps/default/led/kitt.c
@@ -0,0 +1,68 @@
+/* Copyright 2021 HorrorTroll <https://github.com/HorrorTroll>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+// variable for startup animation
+bool BASE_EFFECT_NOT_STARTED_YET = true;
+uint8_t base_effect_startup_counter = 255;
+
+uint8_t led_count = 10;
+uint8_t led_first = 7;
+
+static uint8_t time_to_led(uint8_t time, uint8_t led_behind) {
+    uint16_t led_time = led_count * time;
+    uint16_t step = ((2 * led_count + (led_time / 128)) - led_behind) % (2 * led_count);
+    uint8_t led;
+
+    if (step < led_count) {
+        led = step;
+    } else {
+        led = led_count - 1 - (step - led_count);
+    }
+
+    return led;
+}
+
+static HSV KITT_math(HSV hsv, uint8_t i, uint8_t time) {
+
+    // reset base effect startup
+    if (i == 0) {
+        BASE_EFFECT_NOT_STARTED_YET = true;
+    }
+
+    hsv.h = 0;
+    hsv.s = 255;
+
+    if (i >= led_first && i < led_first + led_count) {
+        uint8_t j = i - led_first;
+        if (j == time_to_led(time, 0)) {
+            hsv.v = hsv.v;
+        } else if (j == time_to_led(time, 1)) {
+            hsv.v = hsv.v/2;
+        } else if (j == time_to_led(time, 2)) {
+            hsv.v = hsv.v/4;
+        } else if (j == time_to_led(time, 3)) {
+            hsv.v = hsv.v/8;
+        } else {
+            hsv.v = 0;
+        }
+    } else {
+        hsv.v = 0;
+    }
+
+    return hsv;
+}
+
+bool KITT(effect_params_t* params) { return effect_runner_i(params, &KITT_math); }
diff --git a/keyboards/horrortroll/handwired_k552/keymaps/default/led/random_breath_rainbow.c b/keyboards/horrortroll/handwired_k552/keymaps/default/led/random_breath_rainbow.c
new file mode 100644
index 0000000000..041417477b
--- /dev/null
+++ b/keyboards/horrortroll/handwired_k552/keymaps/default/led/random_breath_rainbow.c
@@ -0,0 +1,55 @@
+/* Copyright 2021 HorrorTroll <https://github.com/HorrorTroll>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+static uint8_t offset[DRIVER_LED_TOTAL];
+
+static void doRandom_breath_rainbow(int i, effect_params_t* params) {
+    if (!HAS_ANY_FLAGS(g_led_config.flags[i], params->flags)) return;
+    uint16_t time = scale16by8(g_rgb_timer, rgb_matrix_config.speed / 6);
+
+    if (rand() * 50 == 1) {
+        if (rand() * 2 == 1) {
+            offset[i]++;
+        }
+        else {
+            offset[i]--;
+        }
+    }
+
+    //float val = (((float)sin8(time + offset[i]) / 256)/2.1) + .05;
+    HSV hsv = {0, 255, 255};
+    hsv.h = scale16by8(g_rgb_timer + offset[i], rgb_matrix_config.speed / 4) + (offset[i]*2);
+    hsv.v = scale8(abs8(sin8(time) - 128) * 2, hsv.v);
+    RGB rgb = rgb_matrix_hsv_to_rgb(hsv);
+    rgb_matrix_set_color(i, rgb.r, rgb.g, rgb.b);
+}
+
+bool RANDOM_BREATH_RAINBOW(effect_params_t* params) {
+    
+    if (!params->init) {
+        // Change one LED every tick, make sure speed is not 0
+        doRandom_breath_rainbow(rand() % DRIVER_LED_TOTAL, params);
+        return false;
+    }
+	
+    RGB_MATRIX_USE_LIMITS(led_min, led_max);
+
+    for (uint8_t i = led_min; i < led_max; i++) {
+        doRandom_breath_rainbow(i, params);
+    }
+
+    return led_max < DRIVER_LED_TOTAL;
+}
diff --git a/keyboards/horrortroll/handwired_k552/keymaps/default/oled/oled_stuff.h b/keyboards/horrortroll/handwired_k552/keymaps/default/oled/oled_stuff.h
new file mode 100644
index 0000000000..9d8d629179
--- /dev/null
+++ b/keyboards/horrortroll/handwired_k552/keymaps/default/oled/oled_stuff.h
@@ -0,0 +1,69 @@
+/* Copyright 2021 HorrorTroll <https://github.com/HorrorTroll>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+// OLED animation
+#include "lib/bongocat.c"
+#include "lib/galaxy.c"
+#include "lib/wave.c"
+
+#ifdef OLED_ENABLE
+    bool oled_task_user(void) {
+        led_t led_usb_state = host_keyboard_led_state();
+        static uint8_t old_layer;
+        uint8_t layer = get_highest_layer(layer_state | default_layer_state);
+
+        if (layer != old_layer) {
+            oled_clear();
+        }
+
+        old_layer = layer;
+
+        switch (layer) {
+            case 0:
+                render_bongocat();
+                oled_set_cursor(14, 0);                                // sets cursor to (column, row) using charactar spacing (4 rows on 128x32 screen, anything more will overflow back to the top)
+                oled_write_P(PSTR("WPM:"), false);
+                oled_write(get_u8_str(get_current_wpm(), '0'), false); // writes wpm on top right corner of string
+                oled_set_cursor(17, 2);
+                oled_write_P(led_usb_state.caps_lock ? PSTR("CAPS") : PSTR("    "), false);
+                oled_set_cursor(17, 3);
+                oled_write_P(led_usb_state.scroll_lock ? PSTR("SCRL") : PSTR("    "), false);
+                break;
+            case 1:
+                // sleep if it has been long enough since we last got a char
+                if (timer_elapsed32(wave_sleep) > OLED_TIMEOUT) {
+                    oled_off();
+                } else {
+                    oled_on();
+                }
+                // time for the next frame?
+                if (timer_elapsed(wave_timer) > FRAME_TIMEOUT) {
+                    wave_timer = timer_read();
+                    render_frame();
+                }
+
+                oled_set_cursor(0, 3);
+                oled_write_P(led_usb_state.caps_lock ? PSTR("CAPS") : PSTR("    "), false);
+                oled_set_cursor(17, 3);
+                oled_write_P(led_usb_state.scroll_lock ? PSTR("SCRL") : PSTR("    "), false);
+                break;
+            case 2:
+                render_galaxy();
+                break;
+		}
+        return false;
+    }
+#endif
diff --git a/keyboards/horrortroll/handwired_k552/keymaps/default/readme.md b/keyboards/horrortroll/handwired_k552/keymaps/default/readme.md
new file mode 100644
index 0000000000..c8f9c1f8ec
--- /dev/null
+++ b/keyboards/horrortroll/handwired_k552/keymaps/default/readme.md
@@ -0,0 +1,16 @@
+# Default layout and custom LED / OLED
+
+Keymap is default 87 qwerty, TKL layout
+
+It have new LED effect:
+- Custom gradient (ported from SirTimmyTimbit code [https://github.com/SirTimmyTimbit/customizable-gradient-effect-for-drop-alt])
+- Diagonal (ported from pleasuretek code [https://github.com/pleasuretek/qmk_firmware])
+- Cool diagonal (ported from pleasuretek code [https://github.com/pleasuretek/qmk_firmware])
+- Knight Rider (ported from jumper149 code [https://github.com/jumper149/qmk_firmware/blob/jumper149/keyboards/dztech/dz65rgb/keymaps/jumper149/])
+- Random breath rainbow (based from daed code [https://github.com/daed/qmk_firmware/blob/master/keyboards/massdrop/alt/keymaps/daed] and modify by me)
+
+And OLED Animation:
+- Bongo Cat (ported from nwii code [https://github.com/nwii/oledbongocat] and modify image animation by me)
+- Waveform Typing (ported from drcforbin code [https://github.com/drcforbin/keyboards] and modify to correct my TKL layout)
+- Galaxy image when pressing FN key (original image [https://www.deviantart.com/rock-bomber/art/Gateway-668850827] and redraw then cut for 128x32 size by me)
+- Redragon Logo when booting up
diff --git a/keyboards/horrortroll/handwired_k552/keymaps/default/rgb_matrix_user.inc b/keyboards/horrortroll/handwired_k552/keymaps/default/rgb_matrix_user.inc
new file mode 100644
index 0000000000..38edbae993
--- /dev/null
+++ b/keyboards/horrortroll/handwired_k552/keymaps/default/rgb_matrix_user.inc
@@ -0,0 +1,15 @@
+RGB_MATRIX_EFFECT(CUSTOM_GRADIENT)
+RGB_MATRIX_EFFECT(DIAGONAL)
+RGB_MATRIX_EFFECT(COOL_DIAGONAL)
+RGB_MATRIX_EFFECT(KITT)
+RGB_MATRIX_EFFECT(RANDOM_BREATH_RAINBOW)
+
+#ifdef RGB_MATRIX_CUSTOM_EFFECT_IMPLS
+
+#include "led/custom_gradient.c"
+#include "led/diagonal.c"
+#include "led/cool_diagonal.c"
+#include "led/kitt.c"
+#include "led/random_breath_rainbow.c"
+
+#endif // RGB_MATRIX_CUSTOM_EFFECT_IMPLS
\ No newline at end of file
diff --git a/keyboards/horrortroll/handwired_k552/keymaps/default/rules.mk b/keyboards/horrortroll/handwired_k552/keymaps/default/rules.mk
new file mode 100644
index 0000000000..6245023e80
--- /dev/null
+++ b/keyboards/horrortroll/handwired_k552/keymaps/default/rules.mk
@@ -0,0 +1 @@
+RGB_MATRIX_CUSTOM_USER = yes
diff --git a/keyboards/horrortroll/handwired_k552/keymaps/via/config.h b/keyboards/horrortroll/handwired_k552/keymaps/via/config.h
new file mode 100644
index 0000000000..ba3e8e9a03
--- /dev/null
+++ b/keyboards/horrortroll/handwired_k552/keymaps/via/config.h
@@ -0,0 +1,23 @@
+/* Copyright 2021 HorrorTroll <https://github.com/HorrorTroll>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#define DYNAMIC_KEYMAP_LAYER_COUNT 3
+
+#ifdef RGB_MATRIX_ENABLE
+    #define VIA_QMK_RGBLIGHT_ENABLE
+#endif
diff --git a/keyboards/horrortroll/handwired_k552/keymaps/via/keymap.c b/keyboards/horrortroll/handwired_k552/keymaps/via/keymap.c
new file mode 100644
index 0000000000..641e0e5381
--- /dev/null
+++ b/keyboards/horrortroll/handwired_k552/keymaps/via/keymap.c
@@ -0,0 +1,98 @@
+/* Copyright 2021 HorrorTroll <https://github.com/HorrorTroll>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include QMK_KEYBOARD_H
+
+#include "keymap_stuff.h"
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+
+/*
+       ┌───┐   ┌───┬───┬───┬───┐ ┌───┬───┬───┬───┐ ┌───┬───┬───┬───┐ ┌───┬───┬───┐
+       │Esc│   │F1 │F2 │F3 │F4 │ │F5 │F6 │F7 │F8 │ │F9 │F10│F11│F12│ │PSc│Scr│Pse│
+       └───┘   └───┴───┴───┴───┘ └───┴───┴───┴───┘ └───┴───┴───┴───┘ └───┴───┴───┘
+       ┌───┬───┬───┬───┬───┬───┬───┬───┬───┬───┬───┬───┬───┬───────┐ ┌───┬───┬───┐
+       │ ` │ 1 │ 2 │ 3 │ 4 │ 5 │ 6 │ 7 │ 8 │ 9 │ 0 │ - │ = │ Backsp│ │Ins│Hom│PgU│
+       ├───┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─────┤ ├───┼───┼───┤
+       │ Tab │ q │ w │ e │ r │ t │ y │ u │ i │ o │ p │ [ │ ] │  \  │ │Del│End│PgD│
+       ├─────┴┬──┴┬──┴┬──┴┬──┴┬──┴┬──┴┬──┴┬──┴┬──┴┬──┴┬──┴┬──┴─────┤ └───┴───┴───┘
+       │ Caps │ a │ s │ d │ f │ g │ h │ j │ k │ l │ ; │ ' │  Enter │
+       ├──────┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴────────┤     ┌───┐
+       │ LShift │ z │ x │ c │ v │ b │ n │ m │ , │ . │ / │   RShift │     │ ↑ │
+       ├────┬───┴┬──┴─┬─┴───┴───┴───┴───┴───┴──┬┴───┼───┴┬────┬────┤ ┌───┼───┼───┐
+       │LCrl│GUI │LAlt│         Space          │RAlt│ Fn │ App│RCrl│ │ ← │ ↓ │ → │
+       └────┴────┴────┴────────────────────────┴────┴────┴────┴────┘ └───┴───┴───┘
+       ┌───┐   ┌───┬───┬───┬───┐ ┌───┬───┬───┬───┐ ┌───┬───┬───┬───┐ ┌───┬───┬───┐
+       │   │   │   │   │   │   │ │   │   │   │   │ │   │   │   │   │ │   │   │   │
+       └───┘   └───┴───┴───┴───┘ └───┴───┴───┴───┘ └───┴───┴───┴───┘ └───┴───┴───┘
+       ┌───┬───┬───┬───┬───┬───┬───┬───┬───┬───┬───┬───┬───┬───────┐ ┌───┬───┬───┐
+       │ ~ │ ! │ @ │ # │ $ │ % │ ^ │ & │ * │ ( │ ) │ _ │ + │       │ │   │   │   │
+       ├───┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─────┤ ├───┼───┼───┤
+       │     │ Q │ W │ E │ R │ T │ Y │ U │ I │ O │ P │ { │ } │  |  │ │   │   │   │
+       ├─────┴┬──┴┬──┴┬──┴┬──┴┬──┴┬──┴┬──┴┬──┴┬──┴┬──┴┬──┴┬──┴─────┤ └───┴───┴───┘
+       │ Caps │ A │ S │ D │ F │ G │ H │ J │ K │ L │ : │ " │        │
+       ├──────┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴────────┤     ┌───┐
+       │ LShift │ Z │ X │ C │ V │ B │ N │ M │ < │ > │ ? │   RShift │     │   │
+       ├────┬───┴┬──┴─┬─┴───┴───┴───┴───┴───┴──┬┴───┼───┴┬────┬────┤ ┌───┼───┼───┐
+       │    │    │    │                        │    │    │    │    │ │   │   │   │
+       └────┴────┴────┴────────────────────────┴────┴────┴────┴────┘ └───┴───┴───┘
+*/
+    /*  Row:    0        1        2        3        4        5        6        7        8        9        10       11       12       13       14       15        16      */
+    [_BASE] = LAYOUT_tkl_ansi(
+                KC_ESC,  KC_F1,   KC_F2,   KC_F3,   KC_F4,   KC_F5,   KC_F6,   KC_F7,   KC_F8,   KC_F9,   KC_F10,  KC_F11,  KC_F12,           KC_PSCR, KC_SLCK,  KC_PAUSE,
+                KC_GRV,  KC_1,    KC_2,    KC_3,    KC_4,    KC_5,    KC_6,    KC_7,    KC_8,    KC_9,    KC_0,    KC_MINS, KC_EQL,  KC_BSPC, KC_INS,  KC_HOME,  KC_PGUP,
+                KC_TAB,  KC_Q,    KC_W,    KC_E,    KC_R,    KC_T,    KC_Y,    KC_U,    KC_I,    KC_O,    KC_P,    KC_LBRC, KC_RBRC, KC_BSLS, KC_DEL,  KC_END,   KC_PGDN,
+                KC_CAPS, KC_A,    KC_S,    KC_D,    KC_F,    KC_G,    KC_H,    KC_J,    KC_K,    KC_L,    KC_SCLN, KC_QUOT,          KC_ENT,
+                KC_LSFT,          KC_Z,    KC_X,    KC_C,    KC_V,    KC_B,    KC_N,    KC_M,    KC_COMM, KC_DOT,  KC_SLSH,          KC_RSFT,          KC_UP,
+                KC_LCTL, KC_LGUI, KC_LALT, KC_SPC,  KC_RALT, MO(_FN), KC_APP,           KC_RCTL,                                              KC_LEFT, KC_DOWN,  KC_RIGHT
+            ),
+
+    /*  Row:    0        1        2        3        4        5        6        7        8        9        10       11       12       13       14       15        16     */
+    [_WAVE] = LAYOUT_tkl_ansi(
+                KC_ESC,  KC_F1,   KC_F2,   KC_F3,   KC_F4,   KC_F5,   KC_F6,   KC_F7,   KC_F8,   KC_F9,   KC_F10,  KC_F11,  KC_F12,           KC_PSCR, KC_SLCK,  KC_PAUSE,
+                KC_GRV,  KC_1,    KC_2,    KC_3,    KC_4,    KC_5,    KC_6,    KC_7,    KC_8,    KC_9,    KC_0,    KC_MINS, KC_EQL,  KC_BSPC, KC_INS,  KC_HOME,  KC_PGUP,
+                KC_TAB,  KC_Q,    KC_W,    KC_E,    KC_R,    KC_T,    KC_Y,    KC_U,    KC_I,    KC_O,    KC_P,    KC_LBRC, KC_RBRC, KC_BSLS, KC_DEL,  KC_END,   KC_PGDN,
+                KC_CAPS, KC_A,    KC_S,    KC_D,    KC_F,    KC_G,    KC_H,    KC_J,    KC_K,    KC_L,    KC_SCLN, KC_QUOT,          KC_ENT,
+                KC_LSFT,          KC_Z,    KC_X,    KC_C,    KC_V,    KC_B,    KC_N,    KC_M,    KC_COMM, KC_DOT,  KC_SLSH,          KC_RSFT,          KC_UP,
+                KC_LCTL, KC_LGUI, KC_LALT, KC_SPC,  KC_RALT, MO(_FN), KC_APP,           KC_RCTL,                                              KC_LEFT, KC_DOWN,  KC_RIGHT
+            ),
+
+/*
+       ┌───┐   ┌───┬───┬───┬───┐ ┌───┬───┬───┬───┐ ┌───┬───┬───┬───┐ ┌───┬───┬───┐
+       │Rst│   │MeP│VoD│VoU│Mut│ │Stp│Prv│Ply│Nxt│ │Mai│Hom│Cal│Sch│ │Rod│Mod│Tog│
+       └───┘   └───┴───┴───┴───┘ └───┴───┴───┴───┘ └───┴───┴───┴───┘ └───┴───┴───┘
+       ┌───┬───┬───┬───┬───┬───┬───┬───┬───┬───┬───┬───┬───┬───────┐ ┌───┬───┬───┐
+       │   │   │   │   │   │   │   │   │   │   │   │Spd│Spi│       │ │C_E│   │   │
+       ├───┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─────┤ ├───┼───┼───┤
+       │     │1Hd│1Hi│1Sd│1Si│1Vd│1Vi│   │   │   │   │   │   │     │ │   │   │Wve│
+       ├─────┴┬──┴┬──┴┬──┴┬──┴┬──┴┬──┴┬──┴┬──┴┬──┴┬──┴┬──┴┬──┴─────┤ └───┴───┴───┘
+       │      │2Hd│2Hi│2Sd│2Si│2Vd│2Vi│   │   │   │   │   │        │
+       ├──────┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴────────┤     ┌───┐
+       │        │   │Pre│Ref│Flp│   │   │   │   │   │   │          │     │Vai│
+       ├────┬───┴┬──┴─┬─┴───┴───┴───┴───┴───┴──┬┴───┼───┴┬────┬────┤ ┌───┼───┼───┐
+       │    │    │    │                        │    │ Fn │    │    │ │Hud│Vad│Hui│
+       └────┴────┴────┴────────────────────────┴────┴────┴────┴────┘ └───┴───┴───┘
+*/
+    /*  Row:    0        1        2        3        4        5        6        7        8        9        10       11       12       13       14       15        16     */
+    [_FN]   = LAYOUT_tkl_ansi(
+                RESET,   KC_MSEL, KC_VOLD, KC_VOLU, KC_MUTE, KC_MSTP, KC_MPRV, KC_MPLY, KC_MNXT, KC_MAIL, KC_WHOM, KC_CALC, KC_WSCH,          RGB_RMOD, RGB_MOD, RGB_TOG,
+                NK_TOGG, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, RGB_SPD, RGB_SPI, _______, RGB_C_E,  _______, _______,
+                _______, G1_HUD,  G1_HUI,  G1_SAD,  G1_SAI,  G1_VAD,  G1_VAI,  _______, _______, _______, _______, _______, _______, _______, _______,  _______, TG(_WAVE),
+                _______, G2_HUD,  G2_HUI,  G2_SAD,  G2_SAI,  G2_VAD,  G2_VAI,  _______, _______, _______, _______, _______,          _______,
+                _______,          G_PRE,   REF_G,   G_FLIP,  _______, _______, _______, _______, _______, _______, _______,          _______,           RGB_VAI,
+                _______, _______, _______, _______, _______, _______, _______,          _______,                                              RGB_HUD,  RGB_VAD, RGB_HUI
+            ),
+};
diff --git a/keyboards/horrortroll/handwired_k552/keymaps/via/keymap_stuff.h b/keyboards/horrortroll/handwired_k552/keymaps/via/keymap_stuff.h
new file mode 100644
index 0000000000..a97b46e5e4
--- /dev/null
+++ b/keyboards/horrortroll/handwired_k552/keymaps/via/keymap_stuff.h
@@ -0,0 +1,300 @@
+/* Copyright 2021 HorrorTroll <https://github.com/HorrorTroll>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <string.h>
+#include <math.h>
+
+#include <lib/lib8tion/lib8tion.h>
+
+#include "oled/oled_stuff.h"
+
+// Each layer gets a name for readability, which is then used in the keymap matrix below.
+// The underscores don't mean anything - you can have a layer called STUFF or any other name.
+// Layer names don't all need to be of the same length, obviously, and you can also skip them
+// entirely and just use numbers.
+
+enum layer_names {
+    _BASE = 0,
+    _WAVE = 1,
+    _FN = 2
+};
+
+// For CUSTOM_GRADIENT
+HSV gradient_0          = {205, 250, 255};
+HSV gradient_100        = {140, 215, 125};
+bool reflected_gradient = false;
+uint8_t gp_i            = 0;
+
+typedef struct {
+    HSV gradient_0;
+    HSV gradient_1;
+    bool reflected;
+} CUSTOM_PRESETS;
+
+enum user_rgb_mode {
+    RGB_MODE_ALL,
+    RGB_MODE_NONE,
+};
+
+typedef union {
+    uint32_t raw;
+    struct {
+        uint8_t rgb_mode :8;
+    };
+} user_config_t;
+
+user_config_t user_config;
+
+enum layer_keycodes {
+    //Custom Gradient control keycode
+    G1_HUI = SAFE_RANGE, //Custom gradient color 1 hue increase
+    G1_HUD,              //Custom gradient color 1 hue decrease
+    G1_SAI,              //Custom gradient color 1 saturation increase
+    G1_SAD,              //Custom gradient color 1 saturation decrease
+    G1_VAI,              //Custom gradient color 1 value increase
+    G1_VAD,              //Custom gradient color 1 value decrease
+    G2_HUI,              //Custom gradient color 2 hue increase
+    G2_HUD,              //Custom gradient color 2 hue decrease
+    G2_SAI,              //Custom gradient color 2 saturation increase
+    G2_SAD,              //Custom gradient color 2 saturation decrease
+    G2_VAI,              //Custom gradient color 2 value increase
+    G2_VAD,              //Custom gradient color 2 value decrease
+    G_PRE,               //Gradient presets
+    REF_G,               //Toggle between linear and reflected gradient
+    G_FLIP,              //Flip the gradient colors
+  
+    //Custom led effect keycode
+    RGB_C_E,             //Cycle user effect
+};
+
+void keyboard_post_init_user(void) {
+    user_config.raw = eeconfig_read_user();
+    switch (user_config.rgb_mode) {
+        case RGB_MODE_ALL:
+            rgb_matrix_set_flags(LED_FLAG_ALL);
+            rgb_matrix_enable_noeeprom();
+            break;
+        case RGB_MODE_NONE:
+            rgb_matrix_set_flags(LED_FLAG_NONE);
+            rgb_matrix_set_color_all(0, 0, 0);
+            break;
+    }
+}
+
+bool process_record_user(uint16_t keycode, keyrecord_t *record) {
+    process_record_user_oled(keycode, record);
+
+    uint8_t color_adj_step = 5;
+
+    CUSTOM_PRESETS gradient_presets[] = {
+    {{41 , 255, 255}, {233, 245, 255}, false },
+    {{45 , 245, 155}, {160, 255,  80}, false },
+    {{173, 245,  40}, {41 , 255, 205}, true  },
+    {{32 , 255, 165}, {217, 185,  70}, false },
+    {{240, 255, 145}, {115, 255, 245}, true  },
+    {{118, 255, 255}, {242, 255, 255}, false },
+    {{212,  0 ,   0}, {223, 235, 165}, true  },
+    {{205, 250, 255}, {140, 215, 125}, false },
+    };
+
+    uint8_t gp_length = sizeof(gradient_presets)/sizeof(gradient_presets[0]);
+
+    switch (keycode) {
+        case G1_HUI:
+            if (record->event.pressed) {
+                gradient_0.h += color_adj_step;
+                dprintf("Gradient 0 HSV: %d, %d, %d\n", gradient_0.h, gradient_0.s, gradient_0.v);
+            }
+            return false;
+        case G1_HUD:
+            if (record->event.pressed) {
+                gradient_0.h -= color_adj_step;
+                dprintf("Gradient 0 HSV: %d, %d, %d\n", gradient_0.h, gradient_0.s, gradient_0.v);
+            }
+            return false;
+        case G1_SAI:
+            if (record->event.pressed) {
+                gradient_0.s = (gradient_0.s + color_adj_step * 2 <= 255) ? gradient_0.s + color_adj_step * 2 : 255;
+                dprintf("Gradient 0 HSV: %d, %d, %d\n", gradient_0.h, gradient_0.s, gradient_0.v);
+            }
+            return false;
+        case G1_SAD:
+            if (record->event.pressed) {
+                gradient_0.s = (gradient_0.s - color_adj_step * 2 >= 0) ? gradient_0.s - color_adj_step * 2 : 0;
+                dprintf("Gradient 0 HSV: %d, %d, %d\n", gradient_0.h, gradient_0.s, gradient_0.v);
+            }
+            return false;
+        case G1_VAI:
+            if (record->event.pressed) {
+                gradient_0.v = (gradient_0.v + color_adj_step * 2 <= 255) ? gradient_0.v + color_adj_step * 2 : 255;
+                dprintf("Gradient 0 HSV: %d, %d, %d\n", gradient_0.h, gradient_0.s, gradient_0.v);
+            }
+            return false;
+        case G1_VAD:
+            if (record->event.pressed) {
+                gradient_0.v = (gradient_0.v - color_adj_step * 2 >= 0) ? gradient_0.v - color_adj_step * 2 : 0;
+                dprintf("Gradient 0 HSV: %d, %d, %d\n", gradient_0.h, gradient_0.s, gradient_0.v);
+            }
+            return false;
+        case G2_HUI:
+            if (record->event.pressed) {
+                gradient_100.h += color_adj_step;
+                dprintf("Gradient 100 HSV: %d, %d, %d\n", gradient_100.h, gradient_100.s, gradient_100.v);
+            }
+            return false;
+        case G2_HUD:
+            if (record->event.pressed) {
+                gradient_100.h -= color_adj_step;
+                dprintf("Gradient 100 HSV: %d, %d, %d\n", gradient_100.h, gradient_100.s, gradient_100.v);
+            }
+            return false;
+        case G2_SAI:
+            if (record->event.pressed) {
+                gradient_100.s = (gradient_100.s + color_adj_step * 2 <= 255) ? gradient_100.s + color_adj_step * 2 : 255;
+                dprintf("Gradient 100 HSV: %d, %d, %d\n", gradient_100.h, gradient_100.s, gradient_100.v);
+            }
+            return false;
+        case G2_SAD:
+            if (record->event.pressed) {
+                gradient_100.s = (gradient_100.s - color_adj_step * 2 >= 0) ? gradient_100.s - color_adj_step * 2 : 0;
+                dprintf("Gradient 100 HSV: %d, %d, %d\n", gradient_100.h, gradient_100.s, gradient_100.v);
+            }
+            return false;
+        case G2_VAI:
+            if (record->event.pressed) {
+                gradient_100.v = (gradient_100.v + color_adj_step * 2 <= 255) ? gradient_100.v + color_adj_step * 2 : 255;
+                dprintf("Gradient 100 HSV: %d, %d, %d\n", gradient_100.h, gradient_100.s, gradient_100.v);
+            }
+            return false;
+        case G2_VAD:
+            if (record->event.pressed) {
+                gradient_100.v = (gradient_100.v - color_adj_step * 2 >= 0) ? gradient_100.v - color_adj_step * 2 : 0;
+                dprintf("Gradient 100 HSV: %d, %d, %d\n", gradient_100.h, gradient_100.s, gradient_100.v);
+            }
+            return false;
+        case G_PRE:
+            if (record->event.pressed) {
+                gp_i = (gp_i + gp_length ) % gp_length;
+
+                gradient_0 = gradient_presets[gp_i].gradient_0;
+                gradient_100 = gradient_presets[gp_i].gradient_1;
+                reflected_gradient = gradient_presets[gp_i].reflected;
+
+                gp_i += 1;
+            }
+            return false;
+        case REF_G:
+            if (record->event.pressed) {
+                reflected_gradient = !reflected_gradient;
+            }
+            return false;
+        case G_FLIP:
+            if (record->event.pressed) {
+                HSV temp_color = gradient_0;
+                gradient_0 = gradient_100;
+                gradient_100 = temp_color;
+            }
+            return false;
+        case RGB_C_E:
+            if (record->event.pressed) {
+                switch (rgb_matrix_get_mode()) {
+                    case RGB_MATRIX_CUSTOM_CUSTOM_GRADIENT:
+                        rgb_matrix_mode(RGB_MATRIX_CUSTOM_DIAGONAL);
+                        return false;
+                    case RGB_MATRIX_CUSTOM_DIAGONAL:
+                        rgb_matrix_mode(RGB_MATRIX_CUSTOM_COOL_DIAGONAL);
+                        return false;
+                    case RGB_MATRIX_CUSTOM_COOL_DIAGONAL:
+                        rgb_matrix_mode(RGB_MATRIX_CUSTOM_KITT);
+                        return false;
+                    case RGB_MATRIX_CUSTOM_KITT:
+                        rgb_matrix_mode(RGB_MATRIX_CUSTOM_RANDOM_BREATH_RAINBOW);
+                        return false;
+                    default:
+                        rgb_matrix_mode(RGB_MATRIX_CUSTOM_CUSTOM_GRADIENT);
+                        return false;
+                }
+            }
+            return false;
+        case RGB_TOG:
+            if (record->event.pressed) {
+                switch (rgb_matrix_get_flags()) {
+                    case LED_FLAG_ALL: {
+                        rgb_matrix_set_flags(LED_FLAG_NONE);
+                        rgb_matrix_set_color_all(0, 0, 0);
+                        user_config.rgb_mode = RGB_MODE_NONE;
+                    }
+                    break;
+                    default: {
+                        rgb_matrix_set_flags(LED_FLAG_ALL);
+                        rgb_matrix_enable_noeeprom();
+                        user_config.rgb_mode = RGB_MODE_ALL;
+                    }
+                    break;
+                }
+                eeconfig_update_user(user_config.raw);
+            }
+            return false;
+	}
+    return true;
+}
+
+void rgb_matrix_indicators_user(void) {
+    uint8_t  side_leds_left[3]  = {17, 18, 19};
+    uint8_t  side_leds_right[3] = { 4,  5,  6};
+    HSV      hsv = rgb_matrix_config.hsv;
+    uint8_t time = scale16by8(g_rgb_timer, qadd8(32, 1));
+    hsv.h        = time;
+    RGB      rgb = hsv_to_rgb(hsv);
+
+    if ((rgb_matrix_get_flags() & LED_FLAG_ALL)) {
+        if (host_keyboard_led_state().caps_lock) {
+            for (uint8_t i = 0; i < 3; i++)
+            {
+                rgb_matrix_set_color(side_leds_left[i], rgb.r, rgb.g, rgb.b);
+            }
+        }
+        if (host_keyboard_led_state().scroll_lock) {
+            for (uint8_t i = 0; i < 3; i++)
+            {
+                rgb_matrix_set_color(side_leds_right[i], rgb.r, rgb.g, rgb.b);
+            }
+        }
+    } else {
+        if (host_keyboard_led_state().caps_lock) {
+            for (uint8_t i = 0; i < 3; i++)
+            {
+                rgb_matrix_set_color(side_leds_left[i], rgb.r, rgb.g, rgb.b);
+            }
+        } else {
+            for (uint8_t i = 0; i < 3; i++)
+            {
+                rgb_matrix_set_color(side_leds_left[i], 0, 0, 0);
+            }
+        }
+        if (host_keyboard_led_state().scroll_lock) {
+            for (uint8_t i = 0; i < 3; i++)
+            {
+                rgb_matrix_set_color(side_leds_right[i], rgb.r, rgb.g, rgb.b);
+            }
+        } else {
+            for (uint8_t i = 0; i < 3; i++)
+            {
+                rgb_matrix_set_color(side_leds_right[i], 0, 0, 0);
+            }
+        }
+    }
+}
diff --git a/keyboards/horrortroll/handwired_k552/keymaps/via/led/cool_diagonal.c b/keyboards/horrortroll/handwired_k552/keymaps/via/led/cool_diagonal.c
new file mode 100644
index 0000000000..2c518a5431
--- /dev/null
+++ b/keyboards/horrortroll/handwired_k552/keymaps/via/led/cool_diagonal.c
@@ -0,0 +1,22 @@
+/* Copyright 2021 HorrorTroll <https://github.com/HorrorTroll>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+static HSV COOL_DIAGONAL_math(HSV hsv, uint8_t i, uint8_t time) {
+    hsv.h = (g_led_config.point[i].x / 4) - g_led_config.point[i].y - time;
+    return hsv;
+}
+
+bool COOL_DIAGONAL(effect_params_t* params) { return effect_runner_i(params, &COOL_DIAGONAL_math); }
\ No newline at end of file
diff --git a/keyboards/horrortroll/handwired_k552/keymaps/via/led/custom_gradient.c b/keyboards/horrortroll/handwired_k552/keymaps/via/led/custom_gradient.c
new file mode 100644
index 0000000000..49e4a242fb
--- /dev/null
+++ b/keyboards/horrortroll/handwired_k552/keymaps/via/led/custom_gradient.c
@@ -0,0 +1,74 @@
+/* Copyright 2021 HorrorTroll <https://github.com/HorrorTroll>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+extern HSV gradient_0;
+extern HSV gradient_100;
+extern bool reflected_gradient;
+
+static HSV INTERPOLATE_HSV(float step, HSV gradient_0, HSV gradient_100) {
+    uint8_t cw, ccw;
+    HSV color;
+
+    cw = (gradient_0.h >= gradient_100.h) ? 255 + gradient_100.h - gradient_0.h : gradient_100.h - gradient_0.h;  // Hue range is 0 to 255.
+    ccw = (gradient_0.h >= gradient_100.h) ? gradient_0.h - gradient_100.h : 255 + gradient_0.h - gradient_100.h;
+
+    if( cw < ccw ) { // going clockwise
+        color.h = gradient_0.h + (uint8_t)(step * cw);
+    } else { // Going counter clockwise
+        color.h = gradient_0.h - (uint8_t)(step * ccw);
+    }
+
+    color.s = gradient_0.s + step * (gradient_100.s - gradient_0.s);
+
+    // Scale V with global RGB Matrix's V, so users can still control overall brightness with RGB_VAI & RGB_VAD0
+    color.v = round((gradient_0.v + step * (gradient_100.v - gradient_0.v)) * ((float)rgb_matrix_config.hsv.v / 255));
+
+    return color;
+}
+
+static HSV CUSTOM_GRADIENT_math(uint8_t led_x, uint8_t min_x, uint8_t max_x) {
+    float step = (float)led_x / (max_x - min_x);
+    float mid_gradient_pos = 0.5;
+
+    if( reflected_gradient ) {
+        if( step <= mid_gradient_pos ) {
+            return INTERPOLATE_HSV(step * (1/mid_gradient_pos), gradient_0, gradient_100);
+        } else {
+            return INTERPOLATE_HSV((step - mid_gradient_pos) * (1/(1-mid_gradient_pos)), gradient_100, gradient_0);
+        }
+
+    } else {
+        return INTERPOLATE_HSV(step, gradient_0, gradient_100);
+    }
+}
+
+static bool CUSTOM_GRADIENT(effect_params_t* params) {
+    RGB_MATRIX_USE_LIMITS(led_min, led_max);
+
+    uint8_t min_x = 0;  // X coordinate of the left-most LED
+    uint8_t max_x = 224; // X coordinate of the right-most LED
+
+    for (uint8_t i = led_min; i < led_max; i++) {
+        RGB_MATRIX_TEST_LED_FLAGS();
+
+        HSV hsv_orig = CUSTOM_GRADIENT_math(g_led_config.point[i].x, min_x, max_x);
+        RGB rgb = hsv_to_rgb(hsv_orig);
+
+        rgb_matrix_set_color(i, rgb.r, rgb.g, rgb.b);
+    }
+
+    return led_max < DRIVER_LED_TOTAL;
+}
diff --git a/keyboards/horrortroll/handwired_k552/keymaps/via/led/diagonal.c b/keyboards/horrortroll/handwired_k552/keymaps/via/led/diagonal.c
new file mode 100644
index 0000000000..19e3791bd6
--- /dev/null
+++ b/keyboards/horrortroll/handwired_k552/keymaps/via/led/diagonal.c
@@ -0,0 +1,22 @@
+/* Copyright 2021 HorrorTroll <https://github.com/HorrorTroll>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+static HSV DIAGONAL_math(HSV hsv, uint8_t i, uint8_t time) {
+    hsv.h = g_led_config.point[i].x - g_led_config.point[i].y - time;
+    return hsv;
+}
+
+bool DIAGONAL(effect_params_t* params) { return effect_runner_i(params, &DIAGONAL_math); }
diff --git a/keyboards/horrortroll/handwired_k552/keymaps/via/led/kitt.c b/keyboards/horrortroll/handwired_k552/keymaps/via/led/kitt.c
new file mode 100644
index 0000000000..823eb5839b
--- /dev/null
+++ b/keyboards/horrortroll/handwired_k552/keymaps/via/led/kitt.c
@@ -0,0 +1,68 @@
+/* Copyright 2021 HorrorTroll <https://github.com/HorrorTroll>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+// variable for startup animation
+bool BASE_EFFECT_NOT_STARTED_YET = true;
+uint8_t base_effect_startup_counter = 255;
+
+uint8_t led_count = 10;
+uint8_t led_first = 7;
+
+static uint8_t time_to_led(uint8_t time, uint8_t led_behind) {
+    uint16_t led_time = led_count * time;
+    uint16_t step = ((2 * led_count + (led_time / 128)) - led_behind) % (2 * led_count);
+    uint8_t led;
+
+    if (step < led_count) {
+        led = step;
+    } else {
+        led = led_count - 1 - (step - led_count);
+    }
+
+    return led;
+}
+
+static HSV KITT_math(HSV hsv, uint8_t i, uint8_t time) {
+
+    // reset base effect startup
+    if (i == 0) {
+        BASE_EFFECT_NOT_STARTED_YET = true;
+    }
+
+    hsv.h = 0;
+    hsv.s = 255;
+
+    if (i >= led_first && i < led_first + led_count) {
+        uint8_t j = i - led_first;
+        if (j == time_to_led(time, 0)) {
+            hsv.v = hsv.v;
+        } else if (j == time_to_led(time, 1)) {
+            hsv.v = hsv.v/2;
+        } else if (j == time_to_led(time, 2)) {
+            hsv.v = hsv.v/4;
+        } else if (j == time_to_led(time, 3)) {
+            hsv.v = hsv.v/8;
+        } else {
+            hsv.v = 0;
+        }
+    } else {
+        hsv.v = 0;
+    }
+
+    return hsv;
+}
+
+bool KITT(effect_params_t* params) { return effect_runner_i(params, &KITT_math); }
diff --git a/keyboards/horrortroll/handwired_k552/keymaps/via/led/random_breath_rainbow.c b/keyboards/horrortroll/handwired_k552/keymaps/via/led/random_breath_rainbow.c
new file mode 100644
index 0000000000..041417477b
--- /dev/null
+++ b/keyboards/horrortroll/handwired_k552/keymaps/via/led/random_breath_rainbow.c
@@ -0,0 +1,55 @@
+/* Copyright 2021 HorrorTroll <https://github.com/HorrorTroll>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+static uint8_t offset[DRIVER_LED_TOTAL];
+
+static void doRandom_breath_rainbow(int i, effect_params_t* params) {
+    if (!HAS_ANY_FLAGS(g_led_config.flags[i], params->flags)) return;
+    uint16_t time = scale16by8(g_rgb_timer, rgb_matrix_config.speed / 6);
+
+    if (rand() * 50 == 1) {
+        if (rand() * 2 == 1) {
+            offset[i]++;
+        }
+        else {
+            offset[i]--;
+        }
+    }
+
+    //float val = (((float)sin8(time + offset[i]) / 256)/2.1) + .05;
+    HSV hsv = {0, 255, 255};
+    hsv.h = scale16by8(g_rgb_timer + offset[i], rgb_matrix_config.speed / 4) + (offset[i]*2);
+    hsv.v = scale8(abs8(sin8(time) - 128) * 2, hsv.v);
+    RGB rgb = rgb_matrix_hsv_to_rgb(hsv);
+    rgb_matrix_set_color(i, rgb.r, rgb.g, rgb.b);
+}
+
+bool RANDOM_BREATH_RAINBOW(effect_params_t* params) {
+    
+    if (!params->init) {
+        // Change one LED every tick, make sure speed is not 0
+        doRandom_breath_rainbow(rand() % DRIVER_LED_TOTAL, params);
+        return false;
+    }
+	
+    RGB_MATRIX_USE_LIMITS(led_min, led_max);
+
+    for (uint8_t i = led_min; i < led_max; i++) {
+        doRandom_breath_rainbow(i, params);
+    }
+
+    return led_max < DRIVER_LED_TOTAL;
+}
diff --git a/keyboards/horrortroll/handwired_k552/keymaps/via/oled/oled_stuff.h b/keyboards/horrortroll/handwired_k552/keymaps/via/oled/oled_stuff.h
new file mode 100644
index 0000000000..9d8d629179
--- /dev/null
+++ b/keyboards/horrortroll/handwired_k552/keymaps/via/oled/oled_stuff.h
@@ -0,0 +1,69 @@
+/* Copyright 2021 HorrorTroll <https://github.com/HorrorTroll>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+// OLED animation
+#include "lib/bongocat.c"
+#include "lib/galaxy.c"
+#include "lib/wave.c"
+
+#ifdef OLED_ENABLE
+    bool oled_task_user(void) {
+        led_t led_usb_state = host_keyboard_led_state();
+        static uint8_t old_layer;
+        uint8_t layer = get_highest_layer(layer_state | default_layer_state);
+
+        if (layer != old_layer) {
+            oled_clear();
+        }
+
+        old_layer = layer;
+
+        switch (layer) {
+            case 0:
+                render_bongocat();
+                oled_set_cursor(14, 0);                                // sets cursor to (column, row) using charactar spacing (4 rows on 128x32 screen, anything more will overflow back to the top)
+                oled_write_P(PSTR("WPM:"), false);
+                oled_write(get_u8_str(get_current_wpm(), '0'), false); // writes wpm on top right corner of string
+                oled_set_cursor(17, 2);
+                oled_write_P(led_usb_state.caps_lock ? PSTR("CAPS") : PSTR("    "), false);
+                oled_set_cursor(17, 3);
+                oled_write_P(led_usb_state.scroll_lock ? PSTR("SCRL") : PSTR("    "), false);
+                break;
+            case 1:
+                // sleep if it has been long enough since we last got a char
+                if (timer_elapsed32(wave_sleep) > OLED_TIMEOUT) {
+                    oled_off();
+                } else {
+                    oled_on();
+                }
+                // time for the next frame?
+                if (timer_elapsed(wave_timer) > FRAME_TIMEOUT) {
+                    wave_timer = timer_read();
+                    render_frame();
+                }
+
+                oled_set_cursor(0, 3);
+                oled_write_P(led_usb_state.caps_lock ? PSTR("CAPS") : PSTR("    "), false);
+                oled_set_cursor(17, 3);
+                oled_write_P(led_usb_state.scroll_lock ? PSTR("SCRL") : PSTR("    "), false);
+                break;
+            case 2:
+                render_galaxy();
+                break;
+		}
+        return false;
+    }
+#endif
diff --git a/keyboards/horrortroll/handwired_k552/keymaps/via/readme.md b/keyboards/horrortroll/handwired_k552/keymaps/via/readme.md
new file mode 100644
index 0000000000..c8f9c1f8ec
--- /dev/null
+++ b/keyboards/horrortroll/handwired_k552/keymaps/via/readme.md
@@ -0,0 +1,16 @@
+# Default layout and custom LED / OLED
+
+Keymap is default 87 qwerty, TKL layout
+
+It have new LED effect:
+- Custom gradient (ported from SirTimmyTimbit code [https://github.com/SirTimmyTimbit/customizable-gradient-effect-for-drop-alt])
+- Diagonal (ported from pleasuretek code [https://github.com/pleasuretek/qmk_firmware])
+- Cool diagonal (ported from pleasuretek code [https://github.com/pleasuretek/qmk_firmware])
+- Knight Rider (ported from jumper149 code [https://github.com/jumper149/qmk_firmware/blob/jumper149/keyboards/dztech/dz65rgb/keymaps/jumper149/])
+- Random breath rainbow (based from daed code [https://github.com/daed/qmk_firmware/blob/master/keyboards/massdrop/alt/keymaps/daed] and modify by me)
+
+And OLED Animation:
+- Bongo Cat (ported from nwii code [https://github.com/nwii/oledbongocat] and modify image animation by me)
+- Waveform Typing (ported from drcforbin code [https://github.com/drcforbin/keyboards] and modify to correct my TKL layout)
+- Galaxy image when pressing FN key (original image [https://www.deviantart.com/rock-bomber/art/Gateway-668850827] and redraw then cut for 128x32 size by me)
+- Redragon Logo when booting up
diff --git a/keyboards/horrortroll/handwired_k552/keymaps/via/rgb_matrix_user.inc b/keyboards/horrortroll/handwired_k552/keymaps/via/rgb_matrix_user.inc
new file mode 100644
index 0000000000..38edbae993
--- /dev/null
+++ b/keyboards/horrortroll/handwired_k552/keymaps/via/rgb_matrix_user.inc
@@ -0,0 +1,15 @@
+RGB_MATRIX_EFFECT(CUSTOM_GRADIENT)
+RGB_MATRIX_EFFECT(DIAGONAL)
+RGB_MATRIX_EFFECT(COOL_DIAGONAL)
+RGB_MATRIX_EFFECT(KITT)
+RGB_MATRIX_EFFECT(RANDOM_BREATH_RAINBOW)
+
+#ifdef RGB_MATRIX_CUSTOM_EFFECT_IMPLS
+
+#include "led/custom_gradient.c"
+#include "led/diagonal.c"
+#include "led/cool_diagonal.c"
+#include "led/kitt.c"
+#include "led/random_breath_rainbow.c"
+
+#endif // RGB_MATRIX_CUSTOM_EFFECT_IMPLS
\ No newline at end of file
diff --git a/keyboards/horrortroll/handwired_k552/keymaps/via/rules.mk b/keyboards/horrortroll/handwired_k552/keymaps/via/rules.mk
new file mode 100644
index 0000000000..d475530c87
--- /dev/null
+++ b/keyboards/horrortroll/handwired_k552/keymaps/via/rules.mk
@@ -0,0 +1,3 @@
+VIA_ENABLE = yes
+
+RGB_MATRIX_CUSTOM_USER = yes