diff --git a/keyboards/handwired/onekey/at_start_f415/board.h b/keyboards/handwired/onekey/at_start_f415/board.h
new file mode 100644
index 000000000000..f4adc2d4183a
--- /dev/null
+++ b/keyboards/handwired/onekey/at_start_f415/board.h
@@ -0,0 +1,10 @@
+// Copyright 2023-2024 HorrorTroll <https://github.com/HorrorTroll>
+// Copyright 2023-2024 Zhaqian <https://github.com/zhaqian12>
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#pragma once
+
+#include_next <board.h>
+
+#undef AT32F415KB
+#define AT32F415RC
diff --git a/keyboards/handwired/onekey/at_start_f415/config.h b/keyboards/handwired/onekey/at_start_f415/config.h
new file mode 100644
index 000000000000..2b35460f5a38
--- /dev/null
+++ b/keyboards/handwired/onekey/at_start_f415/config.h
@@ -0,0 +1,7 @@
+// Copyright 2023-2024 HorrorTroll <https://github.com/HorrorTroll>
+// Copyright 2023-2024 Zhaqian <https://github.com/zhaqian12>
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#pragma once
+
+#define ADC_PIN A0
diff --git a/keyboards/handwired/onekey/at_start_f415/halconf.h b/keyboards/handwired/onekey/at_start_f415/halconf.h
new file mode 100644
index 000000000000..75d30e6b2d88
--- /dev/null
+++ b/keyboards/handwired/onekey/at_start_f415/halconf.h
@@ -0,0 +1,11 @@
+// Copyright 2023-2024 HorrorTroll <https://github.com/HorrorTroll>
+// Copyright 2023-2024 Zhaqian <https://github.com/zhaqian12>
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#pragma once
+
+#define HAL_USE_ADC TRUE
+
+#define HAL_USE_I2C TRUE
+
+#include_next <halconf.h>
diff --git a/keyboards/handwired/onekey/at_start_f415/info.json b/keyboards/handwired/onekey/at_start_f415/info.json
new file mode 100644
index 000000000000..14cd8443045f
--- /dev/null
+++ b/keyboards/handwired/onekey/at_start_f415/info.json
@@ -0,0 +1,12 @@
+{
+    "keyboard_name": "Onekey AT-START-F415",
+    "processor": "AT32F415",
+    "bootloader": "at32-dfu",
+    "matrix_pins": {
+        "cols": ["B3"],
+        "rows": ["B4"]
+    },
+    "ws2812": {
+        "pin": "B0"
+    }
+}
diff --git a/keyboards/handwired/onekey/at_start_f415/mcuconf.h b/keyboards/handwired/onekey/at_start_f415/mcuconf.h
new file mode 100644
index 000000000000..5fe8ac666064
--- /dev/null
+++ b/keyboards/handwired/onekey/at_start_f415/mcuconf.h
@@ -0,0 +1,13 @@
+// Copyright 2023-2024 HorrorTroll <https://github.com/HorrorTroll>
+// Copyright 2023-2024 Zhaqian <https://github.com/zhaqian12>
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#pragma once
+
+#include_next <mcuconf.h>
+
+#undef AT32_ADC_USE_ADC1
+#define AT32_ADC_USE_ADC1 TRUE
+
+#undef AT32_I2C_USE_I2C1
+#define AT32_I2C_USE_I2C1 TRUE
diff --git a/keyboards/handwired/onekey/at_start_f415/readme.md b/keyboards/handwired/onekey/at_start_f415/readme.md
new file mode 100644
index 000000000000..499ef5fb1695
--- /dev/null
+++ b/keyboards/handwired/onekey/at_start_f415/readme.md
@@ -0,0 +1,3 @@
+# Artery AT-START-F415 Board Onekey
+
+To trigger keypress, short together pins *B3* and *B4*.
diff --git a/keyboards/handwired/onekey/at_start_f415/rules.mk b/keyboards/handwired/onekey/at_start_f415/rules.mk
new file mode 100644
index 000000000000..1071cf62ee35
--- /dev/null
+++ b/keyboards/handwired/onekey/at_start_f415/rules.mk
@@ -0,0 +1 @@
+KEYBOARD_SHARED_EP = yes