diff --git a/ports/raspberrypi/boards/pimoroni_plasma2350w/board.c b/ports/raspberrypi/boards/pimoroni_plasma2350w/board.c
new file mode 100644
index 000000000000..e6a868ab2122
--- /dev/null
+++ b/ports/raspberrypi/boards/pimoroni_plasma2350w/board.c
@@ -0,0 +1,9 @@
+// This file is part of the CircuitPython project: https://circuitpython.org
+//
+// SPDX-FileCopyrightText: Copyright (c) 2021 Scott Shawcroft for Adafruit Industries
+//
+// SPDX-License-Identifier: MIT
+
+#include "supervisor/board.h"
+
+// Use the MP_WEAK supervisor/shared/board.c versions of routines not defined here.
diff --git a/ports/raspberrypi/boards/pimoroni_plasma2350w/link.ld b/ports/raspberrypi/boards/pimoroni_plasma2350w/link.ld
new file mode 100644
index 000000000000..d1edd9567c56
--- /dev/null
+++ b/ports/raspberrypi/boards/pimoroni_plasma2350w/link.ld
@@ -0,0 +1 @@
+firmware_size = 3064k;
diff --git a/ports/raspberrypi/boards/pimoroni_plasma2350w/mpconfigboard.h b/ports/raspberrypi/boards/pimoroni_plasma2350w/mpconfigboard.h
new file mode 100644
index 000000000000..d9e62abb1edd
--- /dev/null
+++ b/ports/raspberrypi/boards/pimoroni_plasma2350w/mpconfigboard.h
@@ -0,0 +1,29 @@
+// This file is part of the CircuitPython project: https://circuitpython.org
+//
+// SPDX-FileCopyrightText: Copyright (c) 2024 Scott Shawcroft for Adafruit Industries
+//
+// SPDX-License-Identifier: MIT
+
+#define MICROPY_HW_BOARD_NAME "Pimoroni Plasma 2350W"
+#define MICROPY_HW_MCU_NAME "rp2350A"
+
+#define CIRCUITPY_RGB_STATUS_INVERTED_PWM
+#define CIRCUITPY_RGB_STATUS_R (&pin_GPIO16)
+#define CIRCUITPY_RGB_STATUS_G (&pin_GPIO17)
+#define CIRCUITPY_RGB_STATUS_B (&pin_GPIO18)
+
+#define CIRCUITPY_BOARD_I2C         (1)
+#define CIRCUITPY_BOARD_I2C_PIN     {{.scl = &pin_GPIO21, .sda = &pin_GPIO20}}
+
+#define DEFAULT_I2C_BUS_SCL (&pin_GPIO21)
+#define DEFAULT_I2C_BUS_SDA (&pin_GPIO20)
+
+#define DEFAULT_SPI_BUS_SCK (&pin_GPIO10)
+#define DEFAULT_SPI_BUS_MOSI (&pin_GPIO11)
+#define DEFAULT_SPI_BUS_MISO (&pin_GPIO8)
+
+#define DEFAULT_UART_BUS_RX (&pin_GPIO1)
+#define DEFAULT_UART_BUS_TX (&pin_GPIO0)
+
+#define CIRCUITPY_DIGITALIO_HAVE_INVALID_PULL (1)
+#define CIRCUITPY_DIGITALIO_HAVE_INVALID_DRIVE_MODE (1)
diff --git a/ports/raspberrypi/boards/pimoroni_plasma2350w/mpconfigboard.mk b/ports/raspberrypi/boards/pimoroni_plasma2350w/mpconfigboard.mk
new file mode 100644
index 000000000000..8563f0d0034c
--- /dev/null
+++ b/ports/raspberrypi/boards/pimoroni_plasma2350w/mpconfigboard.mk
@@ -0,0 +1,35 @@
+USB_VID = 0x2E8A
+USB_PID = 0x10BF
+USB_PRODUCT = "Plasma 2350 W"
+USB_MANUFACTURER = "Pimoroni"
+
+CHIP_VARIANT = RP2350
+CHIP_PACKAGE = A
+CHIP_FAMILY = rp2
+
+EXTERNAL_FLASH_DEVICES = "W25Q32JVxQ"
+
+CIRCUITPY__EVE = 1
+
+CIRCUITPY_CYW43 = 1
+CIRCUITPY_SSL = 1
+CIRCUITPY_HASHLIB = 1
+CIRCUITPY_WEB_WORKFLOW = 1
+CIRCUITPY_MDNS = 1
+CIRCUITPY_SOCKETPOOL = 1
+CIRCUITPY_WIFI = 1
+CIRCUITPY_PICODVI = 0
+CIRCUITPY_USB_HOST = 0
+
+CFLAGS += \
+    -DCYW43_PIN_WL_DYNAMIC=0 \
+	-DCYW43_DEFAULT_PIN_WL_HOST_WAKE=24 \
+	-DCYW43_DEFAULT_PIN_WL_REG_ON=23 \
+	-DCYW43_DEFAULT_PIN_WL_CLOCK=29 \
+	-DCYW43_DEFAULT_PIN_WL_DATA_IN=24 \
+	-DCYW43_DEFAULT_PIN_WL_DATA_OUT=24 \
+	-DCYW43_DEFAULT_PIN_WL_CS=25 \
+	-DCYW43_WL_GPIO_COUNT=3 \
+	-DCYW43_WL_GPIO_LED_PIN=0
+# Must be accompanied by a linker script change
+CFLAGS += -DCIRCUITPY_FIRMWARE_SIZE='(3064 * 1024)'
diff --git a/ports/raspberrypi/boards/pimoroni_plasma2350w/pico-sdk-configboard.h b/ports/raspberrypi/boards/pimoroni_plasma2350w/pico-sdk-configboard.h
new file mode 100644
index 000000000000..66b57dfd13dc
--- /dev/null
+++ b/ports/raspberrypi/boards/pimoroni_plasma2350w/pico-sdk-configboard.h
@@ -0,0 +1,7 @@
+// This file is part of the CircuitPython project: https://circuitpython.org
+//
+// SPDX-FileCopyrightText: Copyright (c) 2021 Scott Shawcroft for Adafruit Industries
+//
+// SPDX-License-Identifier: MIT
+
+// Put board-specific pico-sdk definitions here. This file must exist.
diff --git a/ports/raspberrypi/boards/pimoroni_plasma2350w/pins.c b/ports/raspberrypi/boards/pimoroni_plasma2350w/pins.c
new file mode 100644
index 000000000000..e49812ba803a
--- /dev/null
+++ b/ports/raspberrypi/boards/pimoroni_plasma2350w/pins.c
@@ -0,0 +1,78 @@
+// This file is part of the CircuitPython project: https://circuitpython.org
+//
+// SPDX-FileCopyrightText: Copyright (c) 2024 Scott Shawcroft for Adafruit Industries
+//
+// SPDX-License-Identifier: MIT
+
+#include "shared-bindings/board/__init__.h"
+
+static const mp_rom_map_elem_t board_module_globals_table[] = {
+    CIRCUITPYTHON_BOARD_DICT_STANDARD_ITEMS
+
+    { MP_ROM_QSTR(MP_QSTR_GP0), MP_ROM_PTR(&pin_GPIO0) },
+    { MP_ROM_QSTR(MP_QSTR_TX), MP_ROM_PTR(&pin_GPIO0) },
+
+    { MP_ROM_QSTR(MP_QSTR_GP1), MP_ROM_PTR(&pin_GPIO1) },
+    { MP_ROM_QSTR(MP_QSTR_RX), MP_ROM_PTR(&pin_GPIO1) },
+
+    // GPIO2 through GPIO11 are unconnected
+
+    { MP_ROM_QSTR(MP_QSTR_GP12), MP_ROM_PTR(&pin_GPIO12) },
+    { MP_ROM_QSTR(MP_QSTR_SW_A), MP_ROM_PTR(&pin_GPIO12) },
+    { MP_ROM_QSTR(MP_QSTR_BUTTON), MP_ROM_PTR(&pin_GPIO12) },
+
+    // GPIO13 is unconnected
+
+    { MP_ROM_QSTR(MP_QSTR_GP14), MP_ROM_PTR(&pin_GPIO14) },
+    { MP_ROM_QSTR(MP_QSTR_CLK), MP_ROM_PTR(&pin_GPIO14) },
+
+    { MP_ROM_QSTR(MP_QSTR_GP15), MP_ROM_PTR(&pin_GPIO15) },
+    { MP_ROM_QSTR(MP_QSTR_DATA), MP_ROM_PTR(&pin_GPIO15) },
+
+    { MP_ROM_QSTR(MP_QSTR_GP16), MP_ROM_PTR(&pin_GPIO16) },
+    { MP_ROM_QSTR(MP_QSTR_LED_R), MP_ROM_PTR(&pin_GPIO16) },
+
+    { MP_ROM_QSTR(MP_QSTR_GP17), MP_ROM_PTR(&pin_GPIO17) },
+    { MP_ROM_QSTR(MP_QSTR_LED_G), MP_ROM_PTR(&pin_GPIO17) },
+
+    { MP_ROM_QSTR(MP_QSTR_GP18), MP_ROM_PTR(&pin_GPIO18) },
+    { MP_ROM_QSTR(MP_QSTR_LED_B), MP_ROM_PTR(&pin_GPIO18) },
+
+    { MP_ROM_QSTR(MP_QSTR_GP19), MP_ROM_PTR(&pin_GPIO19) },
+    { MP_ROM_QSTR(MP_QSTR_INT), MP_ROM_PTR(&pin_GPIO19) },
+
+    { MP_ROM_QSTR(MP_QSTR_GP20), MP_ROM_PTR(&pin_GPIO20) },
+    { MP_ROM_QSTR(MP_QSTR_SDA), MP_ROM_PTR(&pin_GPIO20) },
+
+    { MP_ROM_QSTR(MP_QSTR_GP21), MP_ROM_PTR(&pin_GPIO21) },
+    { MP_ROM_QSTR(MP_QSTR_SCL), MP_ROM_PTR(&pin_GPIO21) },
+
+    { MP_ROM_QSTR(MP_QSTR_GP22), MP_ROM_PTR(&pin_GPIO22) },
+    { MP_ROM_QSTR(MP_QSTR_SW_BOOT), MP_ROM_PTR(&pin_GPIO22) },
+    { MP_ROM_QSTR(MP_QSTR_BOOT), MP_ROM_PTR(&pin_GPIO22) },
+    { MP_ROM_QSTR(MP_QSTR_USER_SW), MP_ROM_PTR(&pin_GPIO22) },
+
+    // GPIO23 through GPIO25 are connected to the RM2 module
+
+    { MP_ROM_QSTR(MP_QSTR_GP26), MP_ROM_PTR(&pin_GPIO26) },
+    { MP_ROM_QSTR(MP_QSTR_GP26_A0), MP_ROM_PTR(&pin_GPIO26) },
+    { MP_ROM_QSTR(MP_QSTR_A0), MP_ROM_PTR(&pin_GPIO26) },
+
+    { MP_ROM_QSTR(MP_QSTR_GP27), MP_ROM_PTR(&pin_GPIO27) },
+    { MP_ROM_QSTR(MP_QSTR_GP27_A1), MP_ROM_PTR(&pin_GPIO27) },
+    { MP_ROM_QSTR(MP_QSTR_A1), MP_ROM_PTR(&pin_GPIO27) },
+
+    { MP_ROM_QSTR(MP_QSTR_GP28), MP_ROM_PTR(&pin_GPIO28) },
+    { MP_ROM_QSTR(MP_QSTR_GP28_A2), MP_ROM_PTR(&pin_GPIO28) },
+    { MP_ROM_QSTR(MP_QSTR_A2), MP_ROM_PTR(&pin_GPIO28) },
+
+    // GPIO29 is connected to the RM2 module
+
+    { MP_ROM_QSTR(MP_QSTR_UART), MP_ROM_PTR(&board_uart_obj) },
+
+    { MP_ROM_QSTR(MP_QSTR_SPI), MP_ROM_PTR(&board_spi_obj) },
+
+    { MP_ROM_QSTR(MP_QSTR_I2C), MP_ROM_PTR(&board_i2c_obj) },
+    { MP_ROM_QSTR(MP_QSTR_STEMMA_I2C), MP_ROM_PTR(&board_i2c_obj) },
+};
+MP_DEFINE_CONST_DICT(board_module_globals, board_module_globals_table);