diff --git a/keyboards/handwired/sejin_eat1010r2/info.json b/keyboards/handwired/sejin_eat1010r2/info.json
new file mode 100644
index 00000000000..e913412a9f7
--- /dev/null
+++ b/keyboards/handwired/sejin_eat1010r2/info.json
@@ -0,0 +1,39 @@
+{
+ "keyboard_name": "EAT-1010R2",
+ "manufacturer": "Sejin",
+ "url": "",
+ "maintainer": "DmNosachev",
+ "usb": {
+ "vid": "0x515A",
+ "pid": "0x4D4D",
+ "device_version": "0.0.1"
+ },
+ "diode_direction": "COL2ROW",
+ "development_board": "bluepill",
+ "matrix_pins": {
+ "cols": ["B9", "B8", "B7", "B6", "B5", "B4", "B3", "A15", "C13", "C14", "C15", "A0", "A1", "A2", "A3", "A4"],
+ "rows": ["B11", "B12", "B13", "B14", "B15", "A8", "A9", "A10"],
+ "ghost": true
+ },
+ "indicators": {
+ "caps_lock": "B1",
+ "num_lock": "B0",
+ "scroll_lock": "B10"
+ },
+ "features": {
+ "bootmagic": true,
+ "command": false,
+ "console": false,
+ "extrakey": true,
+ "mousekey": true,
+ "nkro": false
+ },
+ "bootmagic": {
+ "matrix": [1, 0]
+ },
+ "layouts": {
+ "LAYOUT": {
+ "layout": [{"label":"Esc", "x":0, "y":0}, {"label":"F1", "x":2, "y":0}, {"label":"F2", "x":3, "y":0}, {"label":"F3", "x":4, "y":0}, {"label":"F4", "x":5, "y":0}, {"label":"F5", "x":6.5, "y":0}, {"label":"F6", "x":7.5, "y":0}, {"label":"F7", "x":8.5, "y":0}, {"label":"F8", "x":9.5, "y":0}, {"label":"F9", "x":11, "y":0}, {"label":"F10", "x":12, "y":0}, {"label":"F11", "x":13, "y":0}, {"label":"F12", "x":14, "y":0}, {"label":"PrtSc", "x":15.25, "y":0}, {"label":"Scroll Lock", "x":16.25, "y":0}, {"label":"Pause", "x":17.25, "y":0}, {"label":"~", "x":0, "y":1.5}, {"label":"!", "x":1, "y":1.5}, {"label":"@", "x":2, "y":1.5}, {"label":"#", "x":3, "y":1.5}, {"label":"$", "x":4, "y":1.5}, {"label":"%", "x":5, "y":1.5}, {"label":"^", "x":6, "y":1.5}, {"label":"&", "x":7, "y":1.5}, {"label":"*", "x":8, "y":1.5}, {"label":"(", "x":9, "y":1.5}, {"label":")", "x":10, "y":1.5}, {"label":"_", "x":11, "y":1.5}, {"label":"+", "x":12, "y":1.5}, {"label":"|", "x":13, "y":1.5}, {"label":"\u2190", "x":14, "y":1.5}, {"label":"Insert", "x":15.25, "y":1.5}, {"label":"Home", "x":16.25, "y":1.5}, {"label":"PgUp", "x":17.25, "y":1.5}, {"label":"Num Lock", "x":18.5, "y":1.5}, {"label":"/", "x":19.5, "y":1.5}, {"label":"*", "x":20.5, "y":1.5}, {"label":"-", "x":21.5, "y":1.5}, {"label":"Tab", "x":0, "y":2.5, "w":1.5}, {"label":"Q", "x":1.5, "y":2.5}, {"label":"W", "x":2.5, "y":2.5}, {"label":"E", "x":3.5, "y":2.5}, {"label":"R", "x":4.5, "y":2.5}, {"label":"T", "x":5.5, "y":2.5}, {"label":"Y", "x":6.5, "y":2.5}, {"label":"U", "x":7.5, "y":2.5}, {"label":"I", "x":8.5, "y":2.5}, {"label":"O", "x":9.5, "y":2.5}, {"label":"P", "x":10.5, "y":2.5}, {"label":"{", "x":11.5, "y":2.5}, {"label":"}", "x":12.5, "y":2.5}, {"label":"Enter", "x":13.5, "y":2.5, "w":1.5, "h":2}, {"label":"Delete", "x":15.25, "y":2.5}, {"label":"End", "x":16.25, "y":2.5}, {"label":"PgDn", "x":17.25, "y":2.5}, {"label":"7", "x":18.5, "y":2.5}, {"label":"8", "x":19.5, "y":2.5}, {"label":"9", "x":20.5, "y":2.5}, {"label":"+", "x":21.5, "y":2.5, "h":2}, {"label":"Caps Lock", "x":0, "y":3.5, "w":1.75}, {"label":"A", "x":1.75, "y":3.5}, {"label":"S", "x":2.75, "y":3.5}, {"label":"D", "x":3.75, "y":3.5}, {"label":"F", "x":4.75, "y":3.5}, {"label":"G", "x":5.75, "y":3.5}, {"label":"H", "x":6.75, "y":3.5}, {"label":"J", "x":7.75, "y":3.5}, {"label":"K", "x":8.75, "y":3.5}, {"label":"L", "x":9.75, "y":3.5}, {"label":":", "x":10.75, "y":3.5}, {"label":"\"", "x":11.75, "y":3.5}, {"label":"4", "x":18.5, "y":3.5}, {"label":"5", "x":19.5, "y":3.5}, {"label":"6", "x":20.5, "y":3.5}, {"label":"Shift", "x":0, "y":4.5, "w":2.25}, {"label":"Z", "x":2.25, "y":4.5}, {"label":"X", "x":3.25, "y":4.5}, {"label":"C", "x":4.25, "y":4.5}, {"label":"V", "x":5.25, "y":4.5}, {"label":"B", "x":6.25, "y":4.5}, {"label":"N", "x":7.25, "y":4.5}, {"label":"M", "x":8.25, "y":4.5}, {"label":"<", "x":9.25, "y":4.5}, {"label":">", "x":10.25, "y":4.5}, {"label":"?", "x":11.25, "y":4.5}, {"label":"Shift", "x":12.25, "y":4.5, "w":2.75}, {"label":"\u2191", "x":16.25, "y":4.5}, {"label":"1", "x":18.5, "y":4.5}, {"label":"2", "x":19.5, "y":4.5}, {"label":"3", "x":20.5, "y":4.5}, {"label":"Enter", "x":21.5, "y":4.5, "h":2}, {"label":"Ctrl", "x":0, "y":5.5, "w":1.5}, {"label":"Alt", "x":2.5, "y":5.5, "w":1.5}, {"x":4, "y":5.5, "w":7}, {"label":"Alt", "x":11, "y":5.5, "w":1.5}, {"label":"Ctrl", "x":13.5, "y":5.5, "w":1.5}, {"label":"\u2190", "x":15.25, "y":5.5}, {"label":"\u2193", "x":16.25, "y":5.5}, {"label":"\u2192", "x":17.25, "y":5.5}, {"label":"0", "x":18.5, "y":5.5, "w":2}, {"label":".", "x":20.5, "y":5.5}]
+ }
+ }
+}
diff --git a/keyboards/handwired/sejin_eat1010r2/keymaps/debug/keymap.c b/keyboards/handwired/sejin_eat1010r2/keymaps/debug/keymap.c
new file mode 100644
index 00000000000..67691cd5424
--- /dev/null
+++ b/keyboards/handwired/sejin_eat1010r2/keymaps/debug/keymap.c
@@ -0,0 +1,38 @@
+/* Copyright 2023 DmNosachev
+ *
+ * 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 .
+ */
+#include QMK_KEYBOARD_H
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+ /* Base */
+ [0] = LAYOUT_debug(
+ KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO,
+ KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO,
+ KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO,
+ KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO,
+ KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO,
+ KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO,
+ KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO,
+ KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO
+ )
+};
+
+bool process_record_user(uint16_t keycode, keyrecord_t *record) {
+ // If console is enabled, it will print the matrix position and status of each key pressed
+#ifdef CONSOLE_ENABLE
+ uprintf("row: %u, col: %u, pressed: %u\n", record->event.key.row, record->event.key.col, record->event.pressed);
+#endif
+ return true;
+}
\ No newline at end of file
diff --git a/keyboards/handwired/sejin_eat1010r2/keymaps/debug/rules.mk b/keyboards/handwired/sejin_eat1010r2/keymaps/debug/rules.mk
new file mode 100644
index 00000000000..032f2ee316a
--- /dev/null
+++ b/keyboards/handwired/sejin_eat1010r2/keymaps/debug/rules.mk
@@ -0,0 +1 @@
+CONSOLE_ENABLE = yes # Console for debug
diff --git a/keyboards/handwired/sejin_eat1010r2/keymaps/default/keymap.c b/keyboards/handwired/sejin_eat1010r2/keymaps/default/keymap.c
new file mode 100644
index 00000000000..8ab4907331d
--- /dev/null
+++ b/keyboards/handwired/sejin_eat1010r2/keymaps/default/keymap.c
@@ -0,0 +1,48 @@
+/* Copyright 2023 DmNosachev
+ *
+ * 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 .
+ */
+#include QMK_KEYBOARD_H
+
+// Defines names for use in layer keycodes and the keymap
+enum layer_names {
+ _BASE,
+ _FN1
+};
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+/*
+ * ,---------------------------------------------------------------------------------------------------------------------------------------.
+ * | Esc | | F1 | F2 | F3 | F4 | | F5 | F6 | F7 | F8 | | F9 | F10 | F11 | F12 | |PrnSc|ScrLk|Pause| |
+ * |---------------------------------------------------------------------------------------------------------------------------------------|
+ * | ~ ` | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 0 | - | = | \ | Bsp | |Insrt|Home |PgUp | |NumLk| / | * | - |
+ * |---------------------------------------------------------------------------------------------------------------------------------------|
+ * | Tab | Q | W | E | R | T | Y | U | I | O | P | [ | ] | | | Del | End |PgDn | | 7 | 8 | 9 | + |
+ * |-------------------------------------------------------------------------------| | --------------------------------------| |
+ * | Caps | A | S | D | F | G | H | J | K | L | ;: | '" | Enter | | 4 | 5 | 6 | |
+ * |---------------------------------------------------------------------------------------------------------------------------------------|
+ * | Shift | Z | X | C | V | B | N | M | , | . | /? | Shift | | Up | | 1 | 2 | 3 |Enter|
+ * |-----------------------------------------------------------------------------------------|---------------------------------------| |
+ * | Ctrl | | Alt | Space | Alt | | Ctr | |Left |Down |Right| | 0 | . | |
+ * `---------------------------------------------------------------------------------------------------------------------------------------'
+*/
+ [_BASE] = LAYOUT(
+ 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_SCRL, KC_PAUS,
+ 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_BSLS, KC_BSPC, KC_INS, KC_HOME, KC_PGUP, KC_NUM, KC_PSLS, KC_PAST, KC_PMNS,
+ 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_ENT, KC_DEL, KC_END, KC_PGDN, KC_P7, KC_P8, KC_P9, KC_PPLS,
+ 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_P4, KC_P5, KC_P6,
+ 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_P1, KC_P2, KC_P3, KC_PENT,
+ KC_LCTL, KC_LALT, KC_SPC, KC_RALT, KC_RCTL, KC_LEFT, KC_DOWN, KC_RGHT, KC_P0, KC_PDOT
+ )
+};
diff --git a/keyboards/handwired/sejin_eat1010r2/readme.md b/keyboards/handwired/sejin_eat1010r2/readme.md
new file mode 100644
index 00000000000..397e1f5c88b
--- /dev/null
+++ b/keyboards/handwired/sejin_eat1010r2/readme.md
@@ -0,0 +1,48 @@
+# QMK-based firmware for Sejin EAT-1010R2 keyboard
+
+* Keyboard Maintainer: [DmNosachev](https://github.com/DmNosachev)
+* Hardware Supported: Sejin EAT-1010R2 (membrane keyboard, Sejin
+Futaba-mount dome, Asian 101 ISO layout), Blue/Black Pill STM32F103 MCU
+oard. Alternatevely you can use any MCU which is supported by QMK and
+has 27 or more IO pins
+
+Make example for this keyboard (after setting up your build environment):
+
+ make handwired/sejin_eat1010r2:default
+
+Flashing example for this keyboard:
+
+ make handwired/sejin_eat1010r2:default:flash
+
+
+See the [build environment setup](https://docs.qmk.fm/#/getting_started_build_tools)
+and the [make instructions](https://docs.qmk.fm/#/getting_started_make_guide)
+for more information. Brand new to QMK? Start with our
+[Complete Newbs Guide](https://docs.qmk.fm/#/newbs).
+
+## Additional hardware
+* 16 and 8 pin 2.54mm (0.1'') FPC connectors. They can be found at
+Aliexpress for 2–3 USD for 10pcs. Two 8 pin connectors can be glued
+together as a replacement for 16 pin.
+* Three 5mm LEDs and current limiting resistors (150–300Ω, depending on
+LED specs). This keyboard has exactly the same spacing between LEDs as
+IBM Model M, so a corresponding PCB can be used after adding resistors.
+
+## Membrane
+Sejin EAT-1010R2 has 16x8 matrix. There are 16 and 8 pin flex connectors
+from membrane sheets. Solder FPC connectors to devboard (numbering from
+left to right, see *matrix_pins* in info.json file).
+
+## Bootloader
+Burn [STM32duino bootloader](https://github.com/rogerclarkmelbourne/STM32duino-bootloader)
+to Blue Pill board.
+
+There are several ways to get into the bootloader:
+* STM32duino bootloader waits for 3 seconds in DFU mode before jumping to application.
+You just have to start the flashing process, then connect the USB.
+* This firmware is configured with [bootmagic feature](https://docs.qmk.fm/#/feature_bootmagic).
+Hold the ESC key down when plugging the keyboard in to trigger the bootloader.
+
+## Troubleshooting
+There is *debug* layout which has mapping for every matrix position and
+prints column and raw numbers to console (hid_listen or QMK toolbox).
diff --git a/keyboards/handwired/sejin_eat1010r2/rules.mk b/keyboards/handwired/sejin_eat1010r2/rules.mk
new file mode 100644
index 00000000000..a92b0993283
--- /dev/null
+++ b/keyboards/handwired/sejin_eat1010r2/rules.mk
@@ -0,0 +1,2 @@
+# Enter lower-power sleep mode when on the ChibiOS idle thread
+OPT_DEFS += -DCORTEX_ENABLE_WFI_IDLE=TRUE
diff --git a/keyboards/handwired/sejin_eat1010r2/sejin_eat1010r2.h b/keyboards/handwired/sejin_eat1010r2/sejin_eat1010r2.h
new file mode 100644
index 00000000000..9618ed6b649
--- /dev/null
+++ b/keyboards/handwired/sejin_eat1010r2/sejin_eat1010r2.h
@@ -0,0 +1,74 @@
+/* Copyright 2023 DmNosachev
+ *
+ * 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 .
+ */
+
+#pragma once
+
+#include "quantum.h"
+
+/* readability */
+#define XXX KC_NO
+
+/* This is a shortcut to help you visually see your layout.
+ *
+ * The first section contains all of the arguments representing the physical
+ * layout of the board and position of the keys.
+ *
+ * The second converts the arguments into a two-dimensional array which
+ * represents the switch matrix.
+ */
+
+#define LAYOUT( \
+ K10, K1B, K2B, K27, K17, K15, K25, K14, K13, K24, K35, K26, K16, K1C, K2C, K1D, \
+ K20, K30, K3B, K37, K21, K11, K12, K22, K45, K34, K23, K33, K44, K06, K46, K36, K3C, K3D, K2D, K3E, K4E, K3F, \
+ K40, K00, K4B, K47, K41, K31, K32, K42, K55, K04, K43, K03, K54, K07, K05, K4C, K0C, K0D, K4D, K0E, K4F, \
+ K70, K50, K0B, K67, K51, K01, K02, K52, K65, K64, K53, K63, K5C, K5D, K5E, \
+ K7A, K6B, K5B, K77, K71, K61, K62, K72, K75, K74, K73, K6A, K56, K6C, K6D, K6E, K5F, \
+ K79, K78, K7B, K68, K69, K66, K76, K7C, K7E, K7F \
+) \
+{ \
+/* 0 */ { K00, K01, K02, K03, K04, K05, K06, K07, XXX, XXX, XXX, K0B, K0C, K0D, K0E, XXX }, \
+/* 1 */ { K10, K11, K12, K13, K14, K15, K16, K17, XXX, XXX, XXX, K1B, K1C, K1D, XXX, XXX }, \
+/* 2 */ { K20, K21, K22, K23, K24, K25, K26, K27, XXX, XXX, XXX, K2B, K2C, K2D, XXX, XXX }, \
+/* 3 */ { K30, K31, K32, K33, K34, K35, K36, K37, XXX, XXX, XXX, K3B, K3C, K3D, K3E, K3F }, \
+/* 4 */ { K40, K41, K42, K43, K44, K45, K46, K47, XXX, XXX, XXX, K4B, K4C, K4D, K4E, K4F }, \
+/* 5 */ { K50, K51, K52, K53, K54, K55, K56, XXX, XXX, XXX, XXX, K5B, K5C, K5D, K5E, K5F }, \
+/* 6 */ { XXX, K61, K62, K63, K64, K65, K66, K67, K68, K69, K6A, K6B, K6C, K6D, K6E, XXX }, \
+/* 7 */ { K70, K71, K72, K73, K74, K75, K76, K77, K78, K79, K7A, K7B, K7C, XXX, K7E, K7F } \
+}
+/* 0 1 2 3 4 5 6 7 8 9 A B C D E F */
+
+#define LAYOUT_debug( \
+ K00, K01, K02, K03, K04, K05, K06, K07, K08, K09, K0A, K0B, K0C, K0D, K0E, K0F, \
+ K10, K11, K12, K13, K14, K15, K16, K17, K18, K19, K1A, K1B, K1C, K1D, K1E, K1F, \
+ K20, K21, K22, K23, K24, K25, K26, K27, K28, K29, K2A, K2B, K2C, K2D, K2E, K2F, \
+ K30, K31, K32, K33, K34, K35, K36, K37, K38, K39, K3A, K3B, K3C, K3D, K3E, K3F, \
+ K40, K41, K42, K43, K44, K45, K46, K47, K48, K49, K4A, K4B, K4C, K4D, K4E, K4F, \
+ K50, K51, K52, K53, K54, K55, K56, K57, K58, K59, K5A, K5B, K5C, K5D, K5E, K5F, \
+ K60, K61, K62, K63, K64, K65, K66, K67, K68, K69, K6A, K6B, K6C, K6D, K6E, K6F, \
+ K70, K71, K72, K73, K74, K75, K76, K77, K78, K79, K7A, K7B, K7C, K7D, K7E, K7F \
+) \
+{ \
+/* 0 */ { K00, K01, K02, K03, K04, K05, K06, K07, K08, K09, K0A, K0B, K0C, K0D, K0E, K0F }, \
+/* 1 */ { K10, K11, K12, K13, K14, K15, K16, K17, K18, K19, K1A, K1B, K1C, K1D, K1E, K1F }, \
+/* 2 */ { K20, K21, K22, K23, K24, K25, K26, K27, K28, K29, K2A, K2B, K2C, K2D, K2E, K2F }, \
+/* 3 */ { K30, K31, K32, K33, K34, K35, K36, K37, K38, K39, K3A, K3B, K3C, K3D, K3E, K3F }, \
+/* 4 */ { K40, K41, K42, K43, K44, K45, K46, K47, K48, K49, K4A, K4B, K4C, K4D, K4E, K4F }, \
+/* 5 */ { K50, K51, K52, K53, K54, K55, K56, K57, K58, K59, K5A, K5B, K5C, K5D, K5E, K5F }, \
+/* 6 */ { K60, K61, K62, K63, K64, K65, K66, K67, K68, K69, K6A, K6B, K6C, K6D, K6E, K6F }, \
+/* 7 */ { K70, K71, K72, K73, K74, K75, K76, K77, K78, K79, K7A, K7B, K7C, K7D, K7E, K7F } \
+}
+/* 0 1 2 3 4 5 6 7 8 9 A B C D E F */
+