initially add configuration

app/boards/arm/bluehand/Kconfig.board

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+# BlueHand board configuration
+
+# Copyright (c) 2024 The ZMK Contributors
+# SPDX-License-Identifier: MIT
+
+config BOARD_BLUEHAND
+    bool "BlueHand"
+    depends on SOC_NRF52840_QIAA

app/boards/arm/bluehand/Kconfig.defconfig

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+# BlueHand keyboard configuration
+
+# Copyright (c) 2024 The ZMK Contributors
+# SPDX-License-Identifier: MIT
+
+if BOARD_BLUEHAND
+
+config ZMK_KEYBOARD_NAME
+    default "BlueHand"
+
+if USB_DEVICE_STACK
+
+config USB_NRFX
+	default y
+
+endif # USB_DEVICE_STACK
+
+config BT_CTLR
+	default BT
+
+config ZMK_BLE
+	default y
+
+config ZMK_USB
+	default y
+    
+endif # BOARD_BLUEHAND

app/boards/arm/bluehand/bluehand.dts

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+/*
+ * Copyright (c) 2024 The ZMK Contributors
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
+
+/dts-v1/;
+#include <nordic/nrf52840_qiaa.dtsi>
+
+/ {
+	model = "BlueHand";
+	compatible = "blue,hand";
+
+    chosen {
+		zephyr,code-partition = &code_partition;
+        zephyr,sram = &sram0;
+		zephyr,flash = &flash0;
+		zephyr,console = &cdc_acm_uart;
+		zmk,kscan = &kscan0;
+		zmk,battery = &vbatt;
+    };
+
+    kscan0: kscan_0 {
+        compatible = "zmk,kscan-gpio-direct";
+		label = "KSCAN";
+
+        input-gpios
+			= <&gpio0 29 (GPIO_ACTIVE_LOW | GPIO_PULL_UP)>
+			, <&gpio0 2  (GPIO_ACTIVE_LOW | GPIO_PULL_UP)>
+			, <&gpio0 28 (GPIO_ACTIVE_LOW | GPIO_PULL_UP)>
+			, <&gpio0 3  (GPIO_ACTIVE_LOW | GPIO_PULL_UP)>
+			, <&gpio0 13 (GPIO_ACTIVE_LOW | GPIO_PULL_UP)>
+			, <&gpio0 24 (GPIO_ACTIVE_LOW | GPIO_PULL_UP)>
+			, <&gpio0 9  (GPIO_ACTIVE_LOW | GPIO_PULL_UP)>
+			, <&gpio0 10 (GPIO_ACTIVE_LOW | GPIO_PULL_UP)>
+			;
+    };
+
+    leds {
+		compatible = "gpio-leds";
+		powerled: led_r {
+			gpios = <&gpio1 4 GPIO_ACTIVE_HIGH>;
+			label = "PWR LED";
+		};
+
+		activityled: led_b {
+			gpios = <&gpio1 10 GPIO_ACTIVE_HIGH>;
+			label = "Blue LED";
+		};
+	};
+
+	vbatt: vbatt {
+        compatible = "zmk,battery-nrf-vddh";
+    };
+
+};
+&adc {
+	status = "okay";
+};
+
+&gpiote {
+	status = "okay";
+};
+
+&gpio0 {
+	status = "okay";
+};
+
+&gpio1 {
+	status = "okay";
+};
+
+&usbd {
+    status = "okay";
+    cdc_acm_uart: cdc_acm_uart {
+        compatible = "zephyr,cdc-acm-uart";
+    };
+};
+
+
+&flash0 {
+	partitions {
+		compatible = "fixed-partitions";
+		#address-cells = <1>;
+		#size-cells = <1>;
+
+		sd_partition: partition@0 {
+			label = "softdevice";
+			reg = <0x00000000 0x00026000>;
+		};
+		code_partition: partition@26000 {
+			label = "code_partition";
+			reg = <0x00026000 0x000c6000>;
+		};
+
+		/*
+		 * The flash starting at 0x000ec000 and ending at
+		 * 0x000f3fff is reserved for use by the application.
+		 */
+
+		/*
+		 * Storage partition will be used by FCB/LittleFS/NVS
+		 * if enabled.
+		 */
+		storage_partition: partition@ec000 {
+			label = "storage";
+			reg = <0x000ec000 0x00008000>;
+		};
+
+		boot_partition: partition@f4000 {
+			label = "adafruit_boot";
+			reg = <0x000f4000 0x0000c000>;
+		};
+	};
+};

app/boards/arm/bluehand/bluehand.keymap

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+/*
+ * Copyright (c) 2024 The ZMK Contributors
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
+#include <behaviors.dtsi>
+#include <dt-bindings/zmk/keys.h>
+#include <dt-bindings/zmk/bt.h>
+
+/ {
+    keymap {
+        compatible = "zmk,keymap";
+
+        default_layer {
+            // -------------------
+            // | ALT+V | F13 | F14 | ALT+A |
+            // | MO(1) | F15 | F16 | F17   |
+            // ----------------------
+            bindings = <
+                &kp LA(V) &kp F13 &kp F14 &kp LA(A)
+                &mo 1  &kp F15 &kp F16 &kp F17
+            >;
+        };
+
+        nav_layer {
+            // -----------------------
+            // | F18 | F19 | F20       | F21 |
+            // | -   | MO(2) | BT_SEL 0  | BT_SEL 1|
+            // -----------------------
+            bindings = <
+                &kp F18 &kp F19 &kp F20 &kp F21
+                &trans  &mo 2  &bt BT_SEL 0  &bt BT_SEL 1
+            >;
+        };
+
+        other_layer {
+            // -----------------------
+            // | - | - | - | BT_CLR SEL |
+            // | - | - | - | -         |
+            // -----------------------
+            bindings = <
+                &trans &trans &trans &bt BT_CLR
+                &trans &trans &trans &trans
+            >;
+        };
+    };
+};

app/boards/arm/bluehand/bluehand.yaml

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+identifier: bluehand
+name: BlueHand
+type: mcu
+arch: arm
+toolchain:
+  - zephyr
+  - gnuarmemb
+  - xtools
+supported:
+  - adc
+  - usb_device
+  - ble
+  - ieee802154
+  - pwm
+  - watchdog

app/boards/arm/bluehand/bluehand.yml

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+file_format: "1"
+id: bluehand
+name: BlueHand
+type: board
+arch: arm
+outputs:
+  - usb
+  - ble
+url: https://nrf52.jpconstantineau.com/docs/macropad/bluehand/
+features:
+  - keys

app/boards/arm/bluehand/bluehand_defconfig

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+# Copyright (c) 2024 The ZMK Contributors
+# SPDX-License-Identifier: MIT
+
+CONFIG_SOC_SERIES_NRF52X=y
+CONFIG_SOC_NRF52840_QIAA=y
+CONFIG_BOARD_BLUEHAND=y
+
+# Enable MPU
+CONFIG_ARM_MPU=y
+
+# enable GPIO
+CONFIG_GPIO=y
+
+CONFIG_USE_DT_CODE_PARTITION=y
+CONFIG_BUILD_OUTPUT_UF2=y
+
+CONFIG_MPU_ALLOW_FLASH_WRITE=y
+CONFIG_NVS=y
+CONFIG_SETTINGS_NVS=y
+CONFIG_FLASH=y
+CONFIG_FLASH_PAGE_LAYOUT=y
+CONFIG_FLASH_MAP=y

app/boards/arm/bluehand/board.cmake

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+# Copyright (c) 2024 The ZMK Contributors
+# SPDX-License-Identifier: MIT
+
+board_runner_args(nrfjprog "--nrf-family=NRF52" "--softreset")
+include(${ZEPHYR_BASE}/boards/common/blackmagicprobe.board.cmake)
+include(${ZEPHYR_BASE}/boards/common/nrfjprog.board.cmake)