diff --git a/keyboards/yandrstudio/r65ble/keymaps/test_uart/keymap.c b/keyboards/yandrstudio/r65ble/keymaps/test_uart/keymap.c
index 1e7f5b122a72..0881a14a2848 100644
--- a/keyboards/yandrstudio/r65ble/keymaps/test_uart/keymap.c
+++ b/keyboards/yandrstudio/r65ble/keymaps/test_uart/keymap.c
@@ -124,7 +124,7 @@ void oled_task_user(void) {
 
 
 void keyboard_post_init_user(void) {
-    // uart_init(115200);
+    uart_init(115200);
   debug_enable=true;
 //   debug_matrix=true;
   debug_keyboard=true;
diff --git a/keyboards/yandrstudio/r65ble/mcuconf.h b/keyboards/yandrstudio/r65ble/mcuconf.h
index 57607f48009a..22a14621d850 100644
--- a/keyboards/yandrstudio/r65ble/mcuconf.h
+++ b/keyboards/yandrstudio/r65ble/mcuconf.h
@@ -17,8 +17,6 @@
 /*
  * UART driver system settings.
  */
-
-
 #undef STM32_SERIAL_USE_USART1
 #define STM32_SERIAL_USE_USART1 TRUE
 
diff --git a/keyboards/yandrstudio/whiteMouse28T/config.h b/keyboards/yandrstudio/whiteMouse28T/config.h
index 08dae645004a..65f322d4cce9 100644
--- a/keyboards/yandrstudio/whiteMouse28T/config.h
+++ b/keyboards/yandrstudio/whiteMouse28T/config.h
@@ -29,7 +29,7 @@
 #define MATRIX_COLS 7
 
 //                        0    1    2   3   4    5   6
-#define MATRIX_COL_PINS { B14, B15, A8, A9, A10, B4, B3}
+#define MATRIX_COL_PINS { B14, B15, A8, A2, A3, B4, B3}
 #define MATRIX_ROW_PINS { B13, B12, B7, B6}
 
 /* COL2ROW or ROW2COL */
diff --git a/keyboards/yandrstudio/whiteMouse28T/f401/halconf.h b/keyboards/yandrstudio/whiteMouse28T/f401/halconf.h
index ceffe801a72f..6dfee8652349 100644
--- a/keyboards/yandrstudio/whiteMouse28T/f401/halconf.h
+++ b/keyboards/yandrstudio/whiteMouse28T/f401/halconf.h
@@ -19,17 +19,18 @@
 #include_next <halconf.h>
 
 #undef HAL_USE_PWM
-#define HAL_USE_PWM TRUE
+#define HAL_USE_PWM    TRUE
 
-// #define HAL_USE_SERIAL TRUE
+#undef HAL_USE_SERIAL
+#define HAL_USE_SERIAL TRUE
+
+#undef HAL_USE_SPI
+#define HAL_USE_SPI    TRUE
 
 
 #undef SERIAL_USB_BUFFERS_SIZE
 #define SERIAL_USB_BUFFERS_SIZE 256
 
-#undef HAL_USE_SPI
-#define HAL_USE_SPI                         TRUE
-
 #undef  SPI_USE_WAIT
 #define SPI_USE_WAIT TRUE
 
diff --git a/keyboards/yandrstudio/whiteMouse28T/f401/mcuconf.h b/keyboards/yandrstudio/whiteMouse28T/f401/mcuconf.h
index 49983c27dd81..3e8d9acc921e 100644
--- a/keyboards/yandrstudio/whiteMouse28T/f401/mcuconf.h
+++ b/keyboards/yandrstudio/whiteMouse28T/f401/mcuconf.h
@@ -21,10 +21,12 @@
 #undef STM32_PWM_USE_TIM3
 #define STM32_PWM_USE_TIM3 TRUE
 
-
 #undef STM32_SPI_USE_SPI1
 #define STM32_SPI_USE_SPI1                  TRUE
 
+#undef STM32_SERIAL_USE_USART1
+#define STM32_SERIAL_USE_USART1 TRUE
+
 #undef STM32_NO_INIT
 #undef STM32_HSI_ENABLED
 #undef STM32_LSI_ENABLED
diff --git a/keyboards/yandrstudio/whiteMouse28T/keymaps/uart/keymap.c b/keyboards/yandrstudio/whiteMouse28T/keymaps/uart/keymap.c
new file mode 100644
index 000000000000..e562c6dd92f4
--- /dev/null
+++ b/keyboards/yandrstudio/whiteMouse28T/keymaps/uart/keymap.c
@@ -0,0 +1,68 @@
+/* Copyright 2021 JasonRen(biu)
+ *
+ * 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 "uart.h"
+#include "print.h"
+
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+    LAYOUT(
+    KC_ESC,  KC_1,    KC_2,       KC_3,    KC_4,    KC_5,    KC_6,
+    KC_TAB,  KC_Q,    KC_W,       KC_E,    KC_R,    KC_T,    KC_Y,
+    KC_CAPS, KC_A,    KC_S,       KC_D,    KC_F,    KC_G,    KC_H,
+    RGB_TOG, KC_Z,    KC_X,       KC_C,    KC_V,    MO(1),    KC_RSFT),
+    LAYOUT(
+    KC_TRNS, KC_TRNS, KC_TRNS,    KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS,
+    KC_TRNS, KC_TRNS, KC_TRNS,    KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS,
+    KC_TRNS, KC_TRNS, KC_TRNS,    KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS,
+    KC_TRNS, KC_TRNS, KC_TRNS,    KC_SPACE,KC_TRNS, KC_TRNS, KC_TRNS)
+};
+
+
+
+
+void keyboard_post_init_user(void) {
+//     eeconfig_init();
+    uart_init(115200);
+  debug_enable=true;
+//   debug_matrix=true;
+  debug_keyboard=true;
+//     //debug_mouse=true;
+}
+
+bool process_record_user(uint16_t keycode, keyrecord_t *record) {
+    if (record->event.pressed) {
+        uart_putchar(0xff);
+        uart_putchar(keycode >> 8);
+        uart_putchar(keycode & 0xff);
+        uart_putchar(0xfe);
+        uprintf("KL: kc: 0x%04X, col: %u, row: %u, pressed: %b, time: %u, interrupt: %b, count: %u\n", keycode, record->event.key.col, record->event.key.row, record->event.pressed, record->event.time, record->tap.interrupted, record->tap.count);
+    }
+    return true;
+    // switch (keycode) {
+    //     case KC_N:
+    //         if (record->event.pressed) {
+    //             uart_putchar('#');
+    //         } else {
+    //             // Do something else when release
+    //         }
+    //         return false;  // Skip all further processing of this key
+    //     default:
+    //         return true;  // Process all other keycodes normally
+    // }
+}
+
+
diff --git a/keyboards/yandrstudio/whiteMouse28T/keymaps/uart/rules.mk b/keyboards/yandrstudio/whiteMouse28T/keymaps/uart/rules.mk
new file mode 100644
index 000000000000..d643d5f76138
--- /dev/null
+++ b/keyboards/yandrstudio/whiteMouse28T/keymaps/uart/rules.mk
@@ -0,0 +1,2 @@
+VIA_ENABLE = yes
+QUANTUM_LIB_SRC += uart.c