diff --git a/drivers/ninaw10/nina_wifi_bsp.c b/drivers/ninaw10/nina_wifi_bsp.c
index dc71c8260c..04a20b2efb 100644
--- a/drivers/ninaw10/nina_wifi_bsp.c
+++ b/drivers/ninaw10/nina_wifi_bsp.c
@@ -46,15 +46,22 @@
 #define debug_printf(...)
 #endif
 
-int nina_bsp_init(void) {
-    mp_hal_pin_output(MICROPY_HW_NINA_GPIO1);
+// Use the name CS instead of GPIO1
+#ifndef MICROPY_HW_NINA_CS
+#define MICROPY_HW_NINA_CS MICROPY_HW_NINA_GPIO1
+#endif
+
+MP_WEAK int nina_bsp_init(void) {
+    mp_hal_pin_output(MICROPY_HW_NINA_CS);
     mp_hal_pin_input(MICROPY_HW_NINA_ACK);
     mp_hal_pin_output(MICROPY_HW_NINA_RESET);
+    #ifdef MICROPY_HW_NINA_GPIO0
     mp_hal_pin_output(MICROPY_HW_NINA_GPIO0);
+    mp_hal_pin_write(MICROPY_HW_NINA_GPIO0, 1);
+    #endif
 
     // Reset module in WiFi mode
-    mp_hal_pin_write(MICROPY_HW_NINA_GPIO1, 1);
-    mp_hal_pin_write(MICROPY_HW_NINA_GPIO0, 1);
+    mp_hal_pin_write(MICROPY_HW_NINA_CS, 1);
 
     mp_hal_pin_write(MICROPY_HW_NINA_RESET, 0);
     mp_hal_delay_ms(100);
@@ -62,51 +69,59 @@ int nina_bsp_init(void) {
     mp_hal_pin_write(MICROPY_HW_NINA_RESET, 1);
     mp_hal_delay_ms(750);
 
-    mp_hal_pin_write(MICROPY_HW_NINA_GPIO0, 0);
+    #ifdef MICROPY_HW_NINA_GPIO0
     mp_hal_pin_input(MICROPY_HW_NINA_GPIO0);
+    #endif
 
     // Initialize SPI.
     mp_obj_t args[] = {
         MP_OBJ_NEW_SMALL_INT(MICROPY_HW_WIFI_SPI_ID),
         MP_OBJ_NEW_SMALL_INT(MICROPY_HW_WIFI_SPI_BAUDRATE),
     };
-
-    MP_STATE_PORT(mp_wifi_spi) = MP_OBJ_TYPE_GET_SLOT(&machine_spi_type, make_new)((mp_obj_t)&machine_spi_type, 2, 0, args);
+    MP_STATE_PORT(mp_wifi_spi) = MP_OBJ_TYPE_GET_SLOT(&machine_spi_type, make_new)(
+        (mp_obj_t)&machine_spi_type, 2, 0, args);
     return 0;
 }
 
-int nina_bsp_deinit(void) {
-    mp_hal_pin_output(MICROPY_HW_NINA_GPIO1);
-    mp_hal_pin_write(MICROPY_HW_NINA_GPIO1, 1);
+MP_WEAK int nina_bsp_deinit(void) {
+    mp_hal_pin_output(MICROPY_HW_NINA_CS);
+    mp_hal_pin_write(MICROPY_HW_NINA_CS, 1);
 
     mp_hal_pin_output(MICROPY_HW_NINA_RESET);
     mp_hal_pin_write(MICROPY_HW_NINA_RESET, 0);
     mp_hal_delay_ms(100);
 
+    #ifdef MICROPY_HW_NINA_GPIO0
     mp_hal_pin_output(MICROPY_HW_NINA_GPIO0);
     mp_hal_pin_write(MICROPY_HW_NINA_GPIO0, 1);
+    #endif
+
     return 0;
 }
 
-int nina_bsp_atomic_enter(void) {
+MP_WEAK int nina_bsp_atomic_enter(void) {
     #if MICROPY_ENABLE_SCHEDULER
     mp_sched_lock();
     #endif
     return 0;
 }
 
-int nina_bsp_atomic_exit(void) {
+MP_WEAK int nina_bsp_atomic_exit(void) {
     #if MICROPY_ENABLE_SCHEDULER
     mp_sched_unlock();
     #endif
     return 0;
 }
 
-int nina_bsp_read_irq(void) {
+MP_WEAK int nina_bsp_read_irq(void) {
+    #ifdef MICROPY_HW_NINA_GPIO0
     return mp_hal_pin_read(MICROPY_HW_NINA_GPIO0);
+    #else
+    return 1;
+    #endif
 }
 
-int nina_bsp_spi_slave_select(uint32_t timeout) {
+MP_WEAK int nina_bsp_spi_slave_select(uint32_t timeout) {
     // Wait for ACK to go low.
     for (mp_uint_t start = mp_hal_ticks_ms(); mp_hal_pin_read(MICROPY_HW_NINA_ACK) == 1; mp_hal_delay_ms(1)) {
         if (timeout && ((mp_hal_ticks_ms() - start) >= timeout)) {
@@ -115,12 +130,12 @@ int nina_bsp_spi_slave_select(uint32_t timeout) {
     }
 
     // Chip select.
-    mp_hal_pin_write(MICROPY_HW_NINA_GPIO1, 0);
+    mp_hal_pin_write(MICROPY_HW_NINA_CS, 0);
 
     // Wait for ACK to go high.
     for (mp_uint_t start = mp_hal_ticks_ms(); mp_hal_pin_read(MICROPY_HW_NINA_ACK) == 0; mp_hal_delay_ms(1)) {
         if ((mp_hal_ticks_ms() - start) >= 100) {
-            mp_hal_pin_write(MICROPY_HW_NINA_GPIO1, 1);
+            mp_hal_pin_write(MICROPY_HW_NINA_CS, 1);
             return -1;
         }
     }
@@ -128,12 +143,12 @@ int nina_bsp_spi_slave_select(uint32_t timeout) {
     return 0;
 }
 
-int nina_bsp_spi_slave_deselect(void) {
-    mp_hal_pin_write(MICROPY_HW_NINA_GPIO1, 1);
+MP_WEAK int nina_bsp_spi_slave_deselect(void) {
+    mp_hal_pin_write(MICROPY_HW_NINA_CS, 1);
     return 0;
 }
 
-int nina_bsp_spi_transfer(const uint8_t *tx_buf, uint8_t *rx_buf, uint32_t size) {
+MP_WEAK int nina_bsp_spi_transfer(const uint8_t *tx_buf, uint8_t *rx_buf, uint32_t size) {
     mp_obj_t mp_wifi_spi = MP_STATE_PORT(mp_wifi_spi);
     ((mp_machine_spi_p_t *)MP_OBJ_TYPE_GET_SLOT(&machine_spi_type, protocol))->transfer(mp_wifi_spi, size, tx_buf, rx_buf);
     #if NINA_DEBUG
diff --git a/ports/samd/Makefile b/ports/samd/Makefile
index b678cd9828..e45813c9b3 100644
--- a/ports/samd/Makefile
+++ b/ports/samd/Makefile
@@ -13,7 +13,11 @@ ifeq ($(wildcard $(BOARD_DIR)/.),)
 $(error Invalid BOARD specified: $(BOARD_DIR))
 endif
 
+ifneq ($(BOARD_VARIANT),)
+BUILD ?= build-$(BOARD)-$(BOARD_VARIANT)
+else
 BUILD ?= build-$(BOARD)
+endif
 
 CROSS_COMPILE ?= arm-none-eabi-
 UF2CONV ?= $(TOP)/tools/uf2conv.py
diff --git a/ports/samd/boards/ADAFRUIT_ITSYBITSY_M4_EXPRESS/board.json b/ports/samd/boards/ADAFRUIT_ITSYBITSY_M4_EXPRESS/board.json
index a998529ccd..315068eeab 100644
--- a/ports/samd/boards/ADAFRUIT_ITSYBITSY_M4_EXPRESS/board.json
+++ b/ports/samd/boards/ADAFRUIT_ITSYBITSY_M4_EXPRESS/board.json
@@ -12,6 +12,9 @@
         "itsybitsy_m4_express.jpg"
     ],
     "mcu": "samd51",
+    "variants": {
+        "wlan": "WiFi support using a ESP32 module with NINA firmware"
+    },
     "product": "ItsyBitsy M4 Express",
     "thumbnail": "",
     "url": "https://www.adafruit.com/product/3800",
diff --git a/ports/samd/main.c b/ports/samd/main.c
index 2bbaf63e6e..8a393f88a8 100644
--- a/ports/samd/main.c
+++ b/ports/samd/main.c
@@ -29,6 +29,8 @@
 #include "py/gc.h"
 #include "py/mperrno.h"
 #include "py/stackctrl.h"
+// #include "extmod/modbluetooth.h"
+#include "extmod/modnetwork.h"
 #include "shared/readline/readline.h"
 #include "shared/runtime/gchelper.h"
 #include "shared/runtime/pyexec.h"
@@ -52,6 +54,12 @@ void samd_main(void) {
 
         // Initialise sub-systems.
         readline_init0();
+        #if MICROPY_PY_BLUETOOTH
+        // mp_bluetooth_hci_init();
+        #endif
+        #if MICROPY_PY_NETWORK
+        mod_network_init();
+        #endif
 
         // Execute _boot.py to set up the filesystem.
         pyexec_frozen_module("_boot.py", false);
@@ -87,6 +95,12 @@ void samd_main(void) {
 
     soft_reset_exit:
         mp_printf(MP_PYTHON_PRINTER, "MPY: soft reboot\n");
+        #if MICROPY_PY_NETWORK
+        mod_network_deinit();
+        #endif
+        #if MICROPY_PY_BLUETOOTH
+        // mp_bluetooth_deinit();
+        #endif
         #if MICROPY_PY_MACHINE_ADC
         adc_deinit_all();
         #endif
diff --git a/ports/samd/mbedtls/mbedtls_config.h b/ports/samd/mbedtls/mbedtls_config.h
new file mode 100644
index 0000000000..4140bb5145
--- /dev/null
+++ b/ports/samd/mbedtls/mbedtls_config.h
@@ -0,0 +1,35 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2018-2019 Damien P. George
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+#ifndef MICROPY_INCLUDED_MBEDTLS_CONFIG_H
+#define MICROPY_INCLUDED_MBEDTLS_CONFIG_H
+
+// Set MicroPython-specific options.
+#define MICROPY_MBEDTLS_CONFIG_BARE_METAL (1)
+
+// Include common mbedtls configuration.
+#include "extmod/mbedtls/mbedtls_config_common.h"
+
+#endif /* MICROPY_INCLUDED_MBEDTLS_CONFIG_H */
diff --git a/ports/samd/mbedtls/mbedtls_port.c b/ports/samd/mbedtls/mbedtls_port.c
new file mode 100644
index 0000000000..d2509488bf
--- /dev/null
+++ b/ports/samd/mbedtls/mbedtls_port.c
@@ -0,0 +1,42 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2019 Damien P. George
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#ifdef MICROPY_SSL_MBEDTLS
+
+#include "mbedtls_config.h"
+#include <stdint.h>
+uint32_t trng_random_u32();
+
+int mbedtls_hardware_poll(void *data, unsigned char *output, size_t len, size_t *olen) {
+
+    *olen = len;
+    for (size_t i = 0; i < len; i++) {
+        output[i] = (unsigned char)trng_random_u32();
+    }
+    return 0;
+}
+
+#endif
diff --git a/ports/samd/mcu/samd51/manifest_net.py b/ports/samd/mcu/samd51/manifest_net.py
new file mode 100644
index 0000000000..6353bdb47e
--- /dev/null
+++ b/ports/samd/mcu/samd51/manifest_net.py
@@ -0,0 +1,8 @@
+include("$(PORT_DIR)/boards/manifest.py")
+include("$(MPY_DIR)/extmod/asyncio")
+# Drivers
+require("onewire")
+require("ds18x20")
+require("dht")
+# Networking
+require("bundle-networking")
diff --git a/ports/samd/mcu/samd51/mpconfigmcu.h b/ports/samd/mcu/samd51/mpconfigmcu.h
index d567f28eb4..43e03ccde5 100644
--- a/ports/samd/mcu/samd51/mpconfigmcu.h
+++ b/ports/samd/mcu/samd51/mpconfigmcu.h
@@ -16,11 +16,15 @@
 #define MICROPY_PY_RANDOM_SEED_INIT_FUNC (trng_random_u32())
 unsigned long trng_random_u32(void);
 
+// Enable MD5 hash.
+#define MICROPY_PY_UHASHLIB_MD5         (MICROPY_SSL_MBEDTLS)
+#define MICROPY_TRACKED_ALLOC           (MICROPY_SSL_MBEDTLS)
+
 // fatfs configuration used in ffconf.h
-#define MICROPY_FATFS_ENABLE_LFN            (1)
-#define MICROPY_FATFS_RPATH                 (2)
-#define MICROPY_FATFS_MAX_SS                (4096)
-#define MICROPY_FATFS_LFN_CODE_PAGE         437 /* 1=SFN/ANSI 437=LFN/U.S.(OEM) */
+#define MICROPY_FATFS_ENABLE_LFN        (1)
+#define MICROPY_FATFS_RPATH             (2)
+#define MICROPY_FATFS_MAX_SS            (4096)
+#define MICROPY_FATFS_LFN_CODE_PAGE     437 /* 1=SFN/ANSI 437=LFN/U.S.(OEM) */
 
 #define VFS_BLOCK_SIZE_BYTES            (1536) //
 
diff --git a/ports/samd/mcu/samd51/mpconfigmcu.mk b/ports/samd/mcu/samd51/mpconfigmcu.mk
index 0201bacffe..d47ab6c6db 100644
--- a/ports/samd/mcu/samd51/mpconfigmcu.mk
+++ b/ports/samd/mcu/samd51/mpconfigmcu.mk
@@ -8,9 +8,53 @@ MICROPY_HW_CODESIZE ?= 368K
 
 MICROPY_VFS_LFS2 ?= 1
 MICROPY_VFS_FAT ?= 1
+
+ifeq ($(BOARD_VARIANT),WLAN)
+MICROPY_PY_NETWORK ?= 1
+MICROPY_PY_NETWORK_NINAW10 ?= 1
+ifeq ($(MICROPY_HW_CODESIZE),496K)
+MICROPY_PY_SSL ?= 1
+MICROPY_SSL_MBEDTLS ?= 1
+endif
+ifeq ($(MICROPY_HW_CODESIZE),1008K)
+MICROPY_PY_SSL ?= 1
+MICROPY_SSL_MBEDTLS ?= 1
+endif
+endif
+
+ifeq ($(MICROPY_PY_NETWORK),1)
+FROZEN_MANIFEST ?= mcu/$(MCU_SERIES_LOWER)/manifest_net.py
+else
 FROZEN_MANIFEST ?= mcu/$(MCU_SERIES_LOWER)/manifest.py
+endif
 
 SRC_S += shared/runtime/gchelper_thumb2.s
 
 SRC_C += \
 	fatfs_port.c \
+    mbedtls/mbedtls_port.c
+
+
+ifeq ($(MICROPY_PY_NETWORK),1)
+CFLAGS += -DMICROPY_PY_NETWORK=1
+
+SHARED_SRC_C += \
+    shared/netutils/dhcpserver.c \
+    shared/netutils/netutils.c \
+    shared/netutils/trace.c
+endif
+
+ifeq ($(MICROPY_PY_NETWORK_NINAW10),1)
+CFLAGS += -DMICROPY_PY_NETWORK_NINAW10=1
+INC += -I$(TOP)/drivers/ninaw10
+
+DRIVERS_SRC_C += \
+    drivers/ninaw10/nina_bt_hci.c \
+    drivers/ninaw10/nina_wifi_drv.c \
+    drivers/ninaw10/nina_wifi_bsp.c \
+    drivers/ninaw10/machine_pin_nina.c
+
+SRC_C += \
+    nina_wifi_bsp.c
+
+endif
diff --git a/ports/samd/mpconfigport.h b/ports/samd/mpconfigport.h
index 0b47500bf7..85401269eb 100644
--- a/ports/samd/mpconfigport.h
+++ b/ports/samd/mpconfigport.h
@@ -48,7 +48,6 @@
 #endif
 #define MICROPY_ERROR_REPORTING             (MICROPY_ERROR_REPORTING_TERSE)
 #define MICROPY_PY_BUILTINS_HELP_TEXT       samd_help_text
-#define MICROPY_USE_INTERNAL_ERRNO          (1)
 #define MICROPY_SCHEDULER_STATIC_NODES      (1)
 
 #define MICROPY_HW_ENABLE_USBDEV            (1)
@@ -139,6 +138,50 @@
 #define MICROPY_HW_USB_PID (0x9802)
 #endif
 
+// By default networking should include sockets, ssl, websockets, webrepl, dupterm.
+#if MICROPY_PY_NETWORK
+
+#ifndef MICROPY_PY_NETWORK_HOSTNAME_DEFAULT
+#define MICROPY_PY_NETWORK_HOSTNAME_DEFAULT "mpy-samd"
+#endif
+
+#ifndef MICROPY_PY_SOCKET
+#define MICROPY_PY_SOCKET                   (1)
+#endif
+#ifndef MICROPY_PY_SSL
+#define MICROPY_PY_SSL                      (1)
+#endif
+#ifndef MICROPY_PY_WEBSOCKET
+#define MICROPY_PY_WEBSOCKET                (1)
+#endif
+#ifndef MICROPY_PY_WEBREPL
+#define MICROPY_PY_WEBREPL                  (1)
+#endif
+
+#if MICROPY_PY_NETWORK_NINAW10
+// This Network interface requires the extended socket state.
+#ifndef MICROPY_PY_SOCKET_EXTENDED_STATE
+#define MICROPY_PY_SOCKET_EXTENDED_STATE    (1)
+#endif
+extern const struct _mp_obj_type_t mod_network_nic_type_nina;
+#define MICROPY_HW_NIC_NINAW10  { MP_ROM_QSTR(MP_QSTR_WLAN), MP_ROM_PTR(&mod_network_nic_type_nina) },
+
+#else
+
+#define MICROPY_HW_NIC_NINAW10
+
+#endif // MICROPY_PY_NETWORK_NINAW10
+
+#ifndef MICROPY_BOARD_NETWORK_INTERFACES
+#define MICROPY_BOARD_NETWORK_INTERFACES
+#endif
+
+#define MICROPY_PORT_NETWORK_INTERFACES \
+    MICROPY_HW_NIC_NINAW10 \
+    MICROPY_BOARD_NETWORK_INTERFACES
+
+#endif  // MICROPY_PY_NETWORK
+
 // Additional entries for use with pendsv_schedule_dispatch.
 #ifndef MICROPY_BOARD_PENDSV_ENTRIES
 #define MICROPY_BOARD_PENDSV_ENTRIES
diff --git a/ports/samd/nina_wifi_bsp.c b/ports/samd/nina_wifi_bsp.c
new file mode 100644
index 0000000000..abe6e585bc
--- /dev/null
+++ b/ports/samd/nina_wifi_bsp.c
@@ -0,0 +1,113 @@
+/*
+ * This file is part of the OpenMV project, https://openmv.io.
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2013-2021 Ibrahim Abdelkader <iabdalkader@openmv.io>
+ * Copyright (c) 2013-2021 Kwabena W. Agyeman <kwagyeman@openmv.io>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ * NINA-W10 driver BSP implementation.
+ */
+
+#include "py/mphal.h"
+
+#if MICROPY_PY_NETWORK_NINAW10
+
+#include <stdint.h>
+#include <string.h>
+
+#include "py/runtime.h"
+#include "extmod/modmachine.h"
+#include "extmod/virtpin.h"
+#include "mpconfigboard.h"
+
+#include "nina_bsp.h"
+#include "nina_wifi_drv.h"
+
+#if NINA_DEBUG
+#define debug_printf(...) mp_printf(&mp_plat_print, __VA_ARGS__)
+#else
+#define debug_printf(...)
+#endif
+
+// Use the name CS instead of GPIO1
+#ifndef MICROPY_HW_NINA_CS
+#define MICROPY_HW_NINA_CS MICROPY_HW_NINA_GPIO1
+#endif
+
+int nina_bsp_init(void) {
+    mp_hal_pin_output(MICROPY_HW_NINA_CS);
+    mp_hal_pin_input(MICROPY_HW_NINA_ACK);
+    mp_hal_pin_output(MICROPY_HW_NINA_RESET);
+    #ifdef MICROPY_HW_NINA_GPIO0
+    mp_hal_pin_output(MICROPY_HW_NINA_GPIO0);
+    mp_hal_pin_write(MICROPY_HW_NINA_GPIO0, 1);
+    #endif
+
+    // Reset module in WiFi mode
+    mp_hal_pin_write(MICROPY_HW_NINA_CS, 1);
+
+    mp_hal_pin_write(MICROPY_HW_NINA_RESET, 0);
+    mp_hal_delay_ms(100);
+
+    mp_hal_pin_write(MICROPY_HW_NINA_RESET, 1);
+    mp_hal_delay_ms(750);
+
+    #ifdef MICROPY_HW_NINA_GPIO0
+    mp_hal_pin_input(MICROPY_HW_NINA_GPIO0);
+    #endif
+
+    // Initialize SPI.
+    mp_obj_t args[] = {
+        MP_OBJ_NEW_SMALL_INT(MICROPY_HW_WIFI_SPI_ID),
+        MP_OBJ_NEW_SMALL_INT(MICROPY_HW_WIFI_SPI_BAUDRATE),
+        MP_ROM_QSTR(MP_QSTR_sck), MP_OBJ_NEW_SMALL_INT(MICROPY_HW_WIFI_SPI_SCK),
+        MP_ROM_QSTR(MP_QSTR_miso), MP_OBJ_NEW_SMALL_INT(MICROPY_HW_WIFI_SPI_MISO),
+        MP_ROM_QSTR(MP_QSTR_mosi), MP_OBJ_NEW_SMALL_INT(MICROPY_HW_WIFI_SPI_MOSI),
+    };
+    MP_STATE_PORT(mp_wifi_spi) = MP_OBJ_TYPE_GET_SLOT(&machine_spi_type, make_new)(
+        (mp_obj_t)&machine_spi_type, 2, 3, args);
+    return 0;
+}
+
+int nina_bsp_spi_slave_select(uint32_t timeout) {
+    // Wait for ACK to go low.
+    for (mp_uint_t start = mp_hal_ticks_ms(); mp_hal_pin_read(MICROPY_HW_NINA_ACK) == 1; mp_hal_delay_us(100)) {
+        if (timeout && ((mp_hal_ticks_ms() - start) >= timeout)) {
+            return -1;
+        }
+    }
+
+    // Chip select.
+    mp_hal_pin_write(MICROPY_HW_NINA_CS, 0);
+
+    // Wait for ACK to go high.
+    for (mp_uint_t start = mp_hal_ticks_ms(); mp_hal_pin_read(MICROPY_HW_NINA_ACK) == 0; mp_hal_delay_us(100)) {
+        if ((mp_hal_ticks_ms() - start) >= 100) {
+            mp_hal_pin_write(MICROPY_HW_NINA_CS, 1);
+            return -1;
+        }
+    }
+
+    return 0;
+}
+
+#endif // MICROPY_PY_NETWORK_NINAW10