diff --git a/examples/zephyr-blink/src/main.c b/examples/zephyr-blink/src/main.c
index 9c9ab430..4cab4969 100644
--- a/examples/zephyr-blink/src/main.c
+++ b/examples/zephyr-blink/src/main.c
@@ -4,11 +4,12 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
+#include <stdio.h>
 #include <zephyr/kernel.h>
 #include <zephyr/drivers/gpio.h>
 
 /* 1000 msec = 1 sec */
-#define SLEEP_TIME_MS 300
+#define SLEEP_TIME_MS   1000
 
 /* The devicetree node identifier for the "led0" alias. */
 #define LED0_NODE DT_ALIAS(led0)
@@ -19,28 +20,29 @@
  */
 static const struct gpio_dt_spec led = GPIO_DT_SPEC_GET(LED0_NODE, gpios);
 
-void main(void)
+int main(void)
 {
 	int ret;
+	bool led_state = true;
 
-	if (!gpio_is_ready_dt(&led))
-	{
-		return;
+	if (!gpio_is_ready_dt(&led)) {
+		return 0;
 	}
 
 	ret = gpio_pin_configure_dt(&led, GPIO_OUTPUT_ACTIVE);
-	if (ret < 0)
-	{
-		return;
+	if (ret < 0) {
+		return 0;
 	}
 
-	while (1)
-	{
+	while (1) {
 		ret = gpio_pin_toggle_dt(&led);
-		if (ret < 0)
-		{
-			return;
+		if (ret < 0) {
+			return 0;
 		}
+
+		led_state = !led_state;
+		printf("LED state: %s\n", led_state ? "ON" : "OFF");
 		k_msleep(SLEEP_TIME_MS);
 	}
+	return 0;
 }
diff --git a/examples/zephyr-blink/zephyr/CMakeLists.txt b/examples/zephyr-blink/zephyr/CMakeLists.txt
index dce86233..5272a405 100644
--- a/examples/zephyr-blink/zephyr/CMakeLists.txt
+++ b/examples/zephyr-blink/zephyr/CMakeLists.txt
@@ -1,7 +1,7 @@
 # SPDX-License-Identifier: Apache-2.0
 
-cmake_minimum_required(VERSION 3.13.1)
-include($ENV{ZEPHYR_BASE}/cmake/app/boilerplate.cmake NO_POLICY_SCOPE)
+cmake_minimum_required(VERSION 3.20.0)
+find_package(Zephyr REQUIRED HINTS $ENV{ZEPHYR_BASE})
 project(blinky)
 
 target_sources(app PRIVATE ../src/main.c)
diff --git a/examples/zephyr-cpp-synchronization/zephyr/CMakeLists.txt b/examples/zephyr-cpp-synchronization/zephyr/CMakeLists.txt
index 0fa9ce86..1ed7c6b6 100644
--- a/examples/zephyr-cpp-synchronization/zephyr/CMakeLists.txt
+++ b/examples/zephyr-cpp-synchronization/zephyr/CMakeLists.txt
@@ -1,7 +1,7 @@
 # SPDX-License-Identifier: Apache-2.0
 
-cmake_minimum_required(VERSION 3.13.1)
-include($ENV{ZEPHYR_BASE}/cmake/app/boilerplate.cmake NO_POLICY_SCOPE)
+cmake_minimum_required(VERSION 3.20.0)
+find_package(Zephyr REQUIRED HINTS $ENV{ZEPHYR_BASE})
 project(cpp_synchronization)
 
 target_sources(app PRIVATE ../src/main.cpp)
diff --git a/examples/zephyr-drivers-can/zephyr/CMakeLists.txt b/examples/zephyr-drivers-can/zephyr/CMakeLists.txt
index 31126969..dd59da24 100644
--- a/examples/zephyr-drivers-can/zephyr/CMakeLists.txt
+++ b/examples/zephyr-drivers-can/zephyr/CMakeLists.txt
@@ -1,8 +1,8 @@
 # SPDX-License-Identifier: Apache-2.0
 
-cmake_minimum_required(VERSION 3.13.1)
+cmake_minimum_required(VERSION 3.20.0)
+find_package(Zephyr REQUIRED HINTS $ENV{ZEPHYR_BASE})
+project(babbling)
 
-include($ENV{ZEPHYR_BASE}/cmake/app/boilerplate.cmake NO_POLICY_SCOPE)
-project(CAN)
-
-target_sources(app PRIVATE ../src/main.c)
+FILE(GLOB app_sources ../src/*.c)
+target_sources(app PRIVATE ${app_sources})
diff --git a/examples/zephyr-net-https-client/src/main.c b/examples/zephyr-net-https-client/src/main.c
index 933f4b18..5c89fb42 100644
--- a/examples/zephyr-net-https-client/src/main.c
+++ b/examples/zephyr-net-https-client/src/main.c
@@ -141,6 +141,8 @@ static int connect_socket(sa_family_t family, const char *server, int port,
 		LOG_ERR("Cannot connect to %s remote (%d)",
 			family == AF_INET ? "IPv4" : "IPv6",
 			-errno);
+		close(*sock);
+		*sock = -1;
 		ret = -errno;
 	}
 
@@ -360,20 +362,23 @@ int main(void)
 {
 	int iterations = CONFIG_NET_SAMPLE_SEND_ITERATIONS;
 	int i = 0;
-	int ret;
+	int ret = 0;
 
 	while (iterations == 0 || i < iterations) {
 		ret = run_queries();
 		if (ret < 0) {
-			exit(1);
+			ret = 1;
+			break;
 		}
 
 		if (iterations > 0) {
 			i++;
 			if (i >= iterations) {
+				ret = 0;
 				break;
 			}
 		} else {
+			ret = 0;
 			break;
 		}
 	}
@@ -382,6 +387,6 @@ int main(void)
 		k_sleep(K_FOREVER);
 	}
 
-	exit(0);
-	return 0;
+	exit(ret);
+	return ret;
 }
diff --git a/examples/zephyr-net-https-client/zephyr/CMakeLists.txt b/examples/zephyr-net-https-client/zephyr/CMakeLists.txt
index e4afe9e0..29bc61b5 100644
--- a/examples/zephyr-net-https-client/zephyr/CMakeLists.txt
+++ b/examples/zephyr-net-https-client/zephyr/CMakeLists.txt
@@ -1,10 +1,7 @@
 # SPDX-License-Identifier: Apache-2.0
 
-cmake_minimum_required(VERSION 3.13.1)
-
-set (CONF_FILE "prj.conf overlay-tls.conf")
-
-include($ENV{ZEPHYR_BASE}/cmake/app/boilerplate.cmake NO_POLICY_SCOPE)
+cmake_minimum_required(VERSION 3.20.0)
+find_package(Zephyr REQUIRED HINTS $ENV{ZEPHYR_BASE})
 project(http_client)
 
 FILE(GLOB app_sources ../src/*.c)
@@ -16,4 +13,4 @@ generate_inc_file_for_target(
     app
     ../src/https-cert.der
     ${gen_dir}/https-cert.der.inc
-)
+    )
diff --git a/examples/zephyr-net-https-client/zephyr/prj.conf b/examples/zephyr-net-https-client/zephyr/prj.conf
index dda4d34b..6f0e8af7 100644
--- a/examples/zephyr-net-https-client/zephyr/prj.conf
+++ b/examples/zephyr-net-https-client/zephyr/prj.conf
@@ -1,3 +1,7 @@
+# General config
+CONFIG_MAIN_STACK_SIZE=3072
+CONFIG_SYSTEM_WORKQUEUE_STACK_SIZE=2048
+
 # Networking config
 CONFIG_NETWORKING=y
 CONFIG_NET_IPV4=y
@@ -7,12 +11,19 @@ CONFIG_NET_SHELL=y
 
 # Sockets
 CONFIG_NET_SOCKETS=y
-CONFIG_NET_SOCKETS_POSIX_NAMES=y
-CONFIG_NET_SOCKETS_POLL_MAX=4
+CONFIG_ZVFS_POLL_MAX=4
+CONFIG_POSIX_API=y
 
 # Network driver config
 CONFIG_TEST_RANDOM_GENERATOR=y
 
+# Network buffers
+CONFIG_NET_PKT_RX_COUNT=16
+CONFIG_NET_PKT_TX_COUNT=16
+CONFIG_NET_BUF_RX_COUNT=128
+CONFIG_NET_BUF_TX_COUNT=128
+CONFIG_NET_CONTEXT_NET_PKT_POOL=y
+
 # Network address config
 CONFIG_NET_CONFIG_SETTINGS=y
 CONFIG_NET_CONFIG_NEED_IPV4=y
@@ -30,9 +41,8 @@ CONFIG_HTTP_CLIENT=y
 
 # Network debug config
 CONFIG_LOG=y
-CONFIG_LOG_MODE_IMMEDIATE=y
 CONFIG_NET_LOG=y
 CONFIG_NET_SOCKETS_LOG_LEVEL_DBG=n
-CONFIG_NET_HTTP_LOG_LEVEL_DBG=y
-
-CONFIG_MAIN_STACK_SIZE=2048
+CONFIG_NET_HTTP_LOG_LEVEL_DBG=n
+CONFIG_NET_IPV6_LOG_LEVEL_DBG=n
+CONFIG_NET_IPV6_ND_LOG_LEVEL_DBG=n
diff --git a/examples/zephyr-subsys-usb-hid-mouse/include/sample_usbd.h b/examples/zephyr-subsys-usb-hid-mouse/include/sample_usbd.h
new file mode 100644
index 00000000..11779fef
--- /dev/null
+++ b/examples/zephyr-subsys-usb-hid-mouse/include/sample_usbd.h
@@ -0,0 +1,32 @@
+/*
+ * Copyright (c) 2023 Nordic Semiconductor ASA.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#ifndef ZEPHYR_SAMPLES_SUBSYS_USB_COMMON_SAMPLE_USBD_H
+#define ZEPHYR_SAMPLES_SUBSYS_USB_COMMON_SAMPLE_USBD_H
+
+#include <stdint.h>
+#include <zephyr/usb/usbd.h>
+
+/*
+ * The scope of this header is limited to use in USB samples together with the
+ * new experimental USB device stack, you should not use it in your own
+ * application. However, you can use the code as a template.
+ */
+
+/*
+ * This function uses Kconfig.sample_usbd options to configure and initialize a
+ * USB device. It configures sample's device context, default string descriptors,
+ * USB device configuration, registers any available class instances, and
+ * finally initializes USB device. It is limited to a single device with a
+ * single configuration instantiated in sample_usbd_init.c, which should be
+ * enough for a simple USB device sample.
+ *
+ * It returns the configured and initialized USB device context on success,
+ * otherwise it returns NULL.
+ */
+struct usbd_context *sample_usbd_init_device(usbd_msg_cb_t msg_cb);
+
+#endif /* ZEPHYR_SAMPLES_SUBSYS_USB_COMMON_SAMPLE_USBD_H */
diff --git a/examples/zephyr-subsys-usb-hid-mouse/src/main.c b/examples/zephyr-subsys-usb-hid-mouse/src/main.c
index 84913f79..4e579832 100644
--- a/examples/zephyr-subsys-usb-hid-mouse/src/main.c
+++ b/examples/zephyr-subsys-usb-hid-mouse/src/main.c
@@ -55,10 +55,12 @@ static ALWAYS_INLINE void rwup_if_suspended(void)
 	}
 }
 
-static void input_cb(struct input_event *evt)
+static void input_cb(struct input_event *evt, void *user_data)
 {
 	static uint8_t tmp[MOUSE_REPORT_COUNT];
 
+	ARG_UNUSED(user_data);
+
 	switch (evt->code) {
 	case INPUT_KEY_0:
 		rwup_if_suspended();
@@ -95,7 +97,7 @@ static void input_cb(struct input_event *evt)
 
 }
 
-INPUT_CALLBACK_DEFINE(NULL, input_cb);
+INPUT_CALLBACK_DEFINE(NULL, input_cb, NULL);
 
 #if defined(CONFIG_USB_DEVICE_STACK_NEXT)
 static int enable_usb_device_next(void)
@@ -174,11 +176,11 @@ int main(void)
 	}
 
 	while (true) {
-		uint8_t __aligned(sizeof(void *)) report[MOUSE_REPORT_COUNT];
+		UDC_STATIC_BUF_DEFINE(report, MOUSE_REPORT_COUNT);
 
 		k_msgq_get(&mouse_msgq, &report, K_FOREVER);
 
-		ret = hid_int_ep_write(hid_dev, report, sizeof(report), NULL);
+		ret = hid_int_ep_write(hid_dev, report, MOUSE_REPORT_COUNT, NULL);
 		if (ret) {
 			LOG_ERR("HID write error, %d", ret);
 		} else {
diff --git a/examples/zephyr-subsys-usb-hid-mouse/src/sample_usbd_init.c b/examples/zephyr-subsys-usb-hid-mouse/src/sample_usbd_init.c
index 1cca20d8..1428a956 100644
--- a/examples/zephyr-subsys-usb-hid-mouse/src/sample_usbd_init.c
+++ b/examples/zephyr-subsys-usb-hid-mouse/src/sample_usbd_init.c
@@ -33,6 +33,9 @@ USBD_DESC_PRODUCT_DEFINE(sample_product, CONFIG_SAMPLE_USBD_PRODUCT);
 USBD_DESC_SERIAL_NUMBER_DEFINE(sample_sn);
 /* doc string instantiation end */
 
+USBD_DESC_CONFIG_DEFINE(fs_cfg_desc, "FS Configuration");
+USBD_DESC_CONFIG_DEFINE(hs_cfg_desc, "HS Configuration");
+
 /* doc configuration instantiation start */
 static const uint8_t attributes = (IS_ENABLED(CONFIG_SAMPLE_USBD_SELF_POWERED) ?
 				   USB_SCD_SELF_POWERED : 0) |
@@ -42,12 +45,12 @@ static const uint8_t attributes = (IS_ENABLED(CONFIG_SAMPLE_USBD_SELF_POWERED) ?
 /* Full speed configuration */
 USBD_CONFIGURATION_DEFINE(sample_fs_config,
 			  attributes,
-			  CONFIG_SAMPLE_USBD_MAX_POWER);
+			  CONFIG_SAMPLE_USBD_MAX_POWER, &fs_cfg_desc);
 
 /* High speed configuration */
 USBD_CONFIGURATION_DEFINE(sample_hs_config,
 			  attributes,
-			  CONFIG_SAMPLE_USBD_MAX_POWER);
+			  CONFIG_SAMPLE_USBD_MAX_POWER, &hs_cfg_desc);
 /* doc configuration instantiation end */
 
 /*
@@ -69,6 +72,7 @@ static void sample_fix_code_triple(struct usbd_context *uds_ctx,
 	/* Always use class code information from Interface Descriptors */
 	if (IS_ENABLED(CONFIG_USBD_CDC_ACM_CLASS) ||
 	    IS_ENABLED(CONFIG_USBD_CDC_ECM_CLASS) ||
+	    IS_ENABLED(CONFIG_USBD_CDC_NCM_CLASS) ||
 	    IS_ENABLED(CONFIG_USBD_AUDIO2_CLASS)) {
 		/*
 		 * Class with multiple interfaces have an Interface
@@ -159,8 +163,8 @@ struct usbd_context *sample_usbd_init_device(usbd_msg_cb_t msg_cb)
 	}
 
 	if (IS_ENABLED(CONFIG_SAMPLE_USBD_20_EXTENSION_DESC)) {
-		(void)usbd_device_set_bcd(&sample_usbd, USBD_SPEED_FS, 0x0201);
-		(void)usbd_device_set_bcd(&sample_usbd, USBD_SPEED_HS, 0x0201);
+		(void)usbd_device_set_bcd_usb(&sample_usbd, USBD_SPEED_FS, 0x0201);
+		(void)usbd_device_set_bcd_usb(&sample_usbd, USBD_SPEED_HS, 0x0201);
 
 		err = usbd_add_descriptor(&sample_usbd, &sample_usbext);
 		if (err) {
diff --git a/examples/zephyr-subsys-usb-hid-mouse/zephyr/CMakeLists.txt b/examples/zephyr-subsys-usb-hid-mouse/zephyr/CMakeLists.txt
index b2f8c307..3ab90126 100644
--- a/examples/zephyr-subsys-usb-hid-mouse/zephyr/CMakeLists.txt
+++ b/examples/zephyr-subsys-usb-hid-mouse/zephyr/CMakeLists.txt
@@ -2,7 +2,7 @@
 
 cmake_minimum_required(VERSION 3.20.0)
 find_package(Zephyr REQUIRED HINTS $ENV{ZEPHYR_BASE})
-project(hid-keyboard)
+project(hid-mouse)
 
 include(${ZEPHYR_BASE}/samples/subsys/usb/common/common.cmake)
 FILE(GLOB app_sources ../src/*.c)
diff --git a/platform.json b/platform.json
index e1c92cf9..bb69c768 100644
--- a/platform.json
+++ b/platform.json
@@ -298,7 +298,7 @@
       "type": "framework",
       "optional": true,
       "owner": "platformio",
-      "version": "~2.30700.0"
+      "version": "~2.40000.0"
     },
     "tool-stm32duino": {
       "type": "uploader",