<?xml version="1.0" encoding="UTF-8" ?>
<?xml-stylesheet type="text/xsl" href="https://devzone.nordicsemi.com/cfs-file/__key/system/syndication/rss.xsl" media="screen"?><rss version="2.0" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:slash="http://purl.org/rss/1.0/modules/slash/" xmlns:wfw="http://wellformedweb.org/CommentAPI/" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>nRF52840 DFU  issue(ncs1.5.0).</title><link>https://devzone.nordicsemi.com/f/nordic-q-a/76987/nrf52840-dfu-issue-ncs1-5-0</link><description>I refer to this guide to add dfu to peripheral_uart. The program runs on nRF52840DK. 
 1、prj.conf 
 I added the following macros. 
 CONFIG_MCUMGR=y CONFIG_MCUMGR_CMD_OS_MGMT=y CONFIG_MCUMGR_CMD_IMG_MGMT=y CONFIG_MCUMGR_SMP_BT=y CONFIG_BOOTLOADER_MCUBOOT</description><dc:language>en-US</dc:language><generator>Telligent Community 13</generator><lastBuildDate>Thu, 22 Jul 2021 11:10:46 GMT</lastBuildDate><atom:link rel="self" type="application/rss+xml" href="https://devzone.nordicsemi.com/f/nordic-q-a/76987/nrf52840-dfu-issue-ncs1-5-0" /><item><title>RE: nRF52840 DFU  issue(ncs1.5.0).</title><link>https://devzone.nordicsemi.com/thread/321314?ContentTypeID=1</link><pubDate>Thu, 22 Jul 2021 11:10:46 GMT</pubDate><guid isPermaLink="false">137ad170-7792-4731-bb38-c0d22fbe4515:e0cf77fb-d1f3-49e9-9169-621f4c2ab2a8</guid><dc:creator>xinjiang</dc:creator><description>&lt;p&gt;&lt;span&gt;Very thanks.&lt;/span&gt;&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item><item><title>RE: nRF52840 DFU  issue(ncs1.5.0).</title><link>https://devzone.nordicsemi.com/thread/318805?ContentTypeID=1</link><pubDate>Tue, 06 Jul 2021 13:16:44 GMT</pubDate><guid isPermaLink="false">137ad170-7792-4731-bb38-c0d22fbe4515:fccdf975-2075-466a-a068-97c60f1680f4</guid><dc:creator>Amanda Hsieh</dc:creator><description>&lt;p&gt;Hi,&lt;/p&gt;
&lt;p&gt;&lt;span&gt;Sorry for the delay.&amp;nbsp;&lt;/span&gt;&lt;span&gt;The support staff is reduced during the summer holidays, and you may experience delayed answers.&lt;/span&gt;&lt;/p&gt;
&lt;p&gt;&lt;span&gt;--&lt;/span&gt;&lt;/p&gt;
&lt;p&gt;I remove my previous answer which was left quickly before my vacation.&amp;nbsp; I make a&amp;nbsp;peripheral_uart with DFU work for v1.5.0. Hope it can help you.&amp;nbsp;&lt;/p&gt;
&lt;p&gt;prj.conf&lt;/p&gt;
&lt;p&gt;&lt;pre class="ui-code" data-mode="text"&gt;#
# Copyright (c) 2018 Nordic Semiconductor
#
# SPDX-License-Identifier: LicenseRef-BSD-5-Clause-Nordic
#

# Enable the UART driver
CONFIG_UART_ASYNC_API=y
CONFIG_NRFX_UARTE0=y
CONFIG_SERIAL=y
CONFIG_CONSOLE=y
CONFIG_UART_CONSOLE=y

CONFIG_GPIO=y

# Make sure printk is not printing to the UART console
CONFIG_CONSOLE=y
CONFIG_UART_CONSOLE=y

CONFIG_HEAP_MEM_POOL_SIZE=2048

CONFIG_BT=y
CONFIG_BT_PERIPHERAL=y
CONFIG_BT_DEVICE_NAME=&amp;quot;Nordic_UART_Servce&amp;quot;
CONFIG_BT_DEVICE_APPEARANCE=833
CONFIG_BT_MAX_CONN=1
CONFIG_BT_MAX_PAIRED=1
# Allow for large Bluetooth data packets.
CONFIG_BT_L2CAP_TX_MTU=252
CONFIG_BT_L2CAP_RX_MTU=252
CONFIG_BT_RX_BUF_LEN=260

# Enable the NUS service
CONFIG_BT_NUS=y

# Enable bonding
CONFIG_BT_SETTINGS=y
CONFIG_FLASH=y
CONFIG_FLASH_PAGE_LAYOUT=y
CONFIG_FLASH_MAP=y
CONFIG_NVS=y
CONFIG_SETTINGS=y


# Enable DK LED and Buttons library
CONFIG_DK_LIBRARY=y

# This example requires more workqueue stack
CONFIG_SYSTEM_WORKQUEUE_STACK_SIZE=2048

# Config logger
CONFIG_LOG=y
CONFIG_LOG_DEFAULT_LEVEL=3
CONFIG_USE_SEGGER_RTT=y
CONFIG_LOG_BACKEND_RTT=y
CONFIG_LOG_BACKEND_UART=y

CONFIG_ASSERT=y

# Enable DFU
CONFIG_MCUMGR=y
CONFIG_MCUMGR_SMP_BT=y
CONFIG_MCUMGR_CMD_OS_MGMT=y
CONFIG_MCUMGR_CMD_IMG_MGMT=y

CONFIG_BOOTLOADER_MCUBOOT=y

CONFIG_MCUBOOT_IMAGE_VERSION=&amp;quot;3.0.0&amp;quot;
&lt;/pre&gt;&lt;/p&gt;
&lt;p&gt;main.c&lt;/p&gt;
&lt;p&gt;&lt;pre class="ui-code" data-mode="c_cpp"&gt;/*
 * Copyright (c) 2018 Nordic Semiconductor ASA
 *
 * SPDX-License-Identifier: LicenseRef-BSD-5-Clause-Nordic
 */

/** @file
 *  @brief Nordic UART Bridge Service (NUS) sample
 */

#include &amp;lt;zephyr/types.h&amp;gt;
#include &amp;lt;zephyr.h&amp;gt;
#include &amp;lt;drivers/uart.h&amp;gt;
#include &amp;lt;mgmt/mcumgr/smp_bt.h&amp;gt;
#include &amp;quot;os_mgmt/os_mgmt.h&amp;quot;
#include &amp;quot;img_mgmt/img_mgmt.h&amp;quot;

#include &amp;lt;device.h&amp;gt;
#include &amp;lt;soc.h&amp;gt;

#include &amp;lt;bluetooth/bluetooth.h&amp;gt;
#include &amp;lt;bluetooth/uuid.h&amp;gt;
#include &amp;lt;bluetooth/gatt.h&amp;gt;
#include &amp;lt;bluetooth/hci.h&amp;gt;

#include &amp;lt;bluetooth/services/nus.h&amp;gt;

#include &amp;lt;dk_buttons_and_leds.h&amp;gt;

#include &amp;lt;settings/settings.h&amp;gt;

#include &amp;lt;stdio.h&amp;gt;

#include &amp;lt;logging/log.h&amp;gt;

#define LOG_MODULE_NAME peripheral_uart
LOG_MODULE_REGISTER(LOG_MODULE_NAME);

#define STACKSIZE CONFIG_BT_NUS_THREAD_STACK_SIZE
#define PRIORITY 7

#define DEVICE_NAME CONFIG_BT_DEVICE_NAME
#define DEVICE_NAME_LEN	(sizeof(DEVICE_NAME) - 1)

#define RUN_STATUS_LED DK_LED1
#define RUN_LED_BLINK_INTERVAL 1000

#define CON_STATUS_LED DK_LED2

#define KEY_PASSKEY_ACCEPT DK_BTN1_MSK
#define KEY_PASSKEY_REJECT DK_BTN2_MSK

#define UART_BUF_SIZE CONFIG_BT_NUS_UART_BUFFER_SIZE
#define UART_WAIT_FOR_BUF_DELAY K_MSEC(50)
#define UART_WAIT_FOR_RX CONFIG_BT_NUS_UART_RX_WAIT_TIME

static K_SEM_DEFINE(ble_init_ok, 0, 1);

static struct bt_conn *current_conn;
static struct bt_conn *auth_conn;

static const struct device *uart;
static struct k_delayed_work uart_work;

struct uart_data_t {
	void *fifo_reserved;
	uint8_t data[UART_BUF_SIZE];
	uint16_t len;
};

static K_FIFO_DEFINE(fifo_uart_tx_data);
static K_FIFO_DEFINE(fifo_uart_rx_data);

static const struct bt_data ad[] = {
	BT_DATA_BYTES(BT_DATA_FLAGS, (BT_LE_AD_GENERAL | BT_LE_AD_NO_BREDR)),
	BT_DATA(BT_DATA_NAME_COMPLETE, DEVICE_NAME, DEVICE_NAME_LEN),
};

static const struct bt_data sd[] = {
	BT_DATA_BYTES(BT_DATA_UUID128_ALL, BT_UUID_NUS_VAL),
};

static void uart_cb(const struct device *dev, struct uart_event *evt, void *user_data)
{
	ARG_UNUSED(dev);

	static uint8_t *current_buf;
	static size_t aborted_len;
	static bool buf_release;
	struct uart_data_t *buf;
	static uint8_t *aborted_buf;

	switch (evt-&amp;gt;type) {
	case UART_TX_DONE:
		if ((evt-&amp;gt;data.tx.len == 0) ||
		    (!evt-&amp;gt;data.tx.buf)) {
			return;
		}

		if (aborted_buf) {
			buf = CONTAINER_OF(aborted_buf, struct uart_data_t,
					   data);
			aborted_buf = NULL;
			aborted_len = 0;
		} else {
			buf = CONTAINER_OF(evt-&amp;gt;data.tx.buf, struct uart_data_t,
					   data);
		}

		k_free(buf);

		buf = k_fifo_get(&amp;amp;fifo_uart_tx_data, K_NO_WAIT);
		if (!buf) {
			return;
		}

		if (uart_tx(uart, buf-&amp;gt;data, buf-&amp;gt;len, SYS_FOREVER_MS)) {
			LOG_WRN(&amp;quot;Failed to send data over UART&amp;quot;);
		}

		break;

	case UART_RX_RDY:
		buf = CONTAINER_OF(evt-&amp;gt;data.rx.buf, struct uart_data_t, data);
		buf-&amp;gt;len += evt-&amp;gt;data.rx.len;
		buf_release = false;

		if (buf-&amp;gt;len == UART_BUF_SIZE) {
			k_fifo_put(&amp;amp;fifo_uart_rx_data, buf);
		} else if ((evt-&amp;gt;data.rx.buf[buf-&amp;gt;len - 1] == &amp;#39;\n&amp;#39;) ||
			  (evt-&amp;gt;data.rx.buf[buf-&amp;gt;len - 1] == &amp;#39;\r&amp;#39;)) {
			k_fifo_put(&amp;amp;fifo_uart_rx_data, buf);
			current_buf = evt-&amp;gt;data.rx.buf;
			buf_release = true;
			uart_rx_disable(uart);
		}

		break;

	case UART_RX_DISABLED:
		buf = k_malloc(sizeof(*buf));
		if (buf) {
			buf-&amp;gt;len = 0;
		} else {
			LOG_WRN(&amp;quot;Not able to allocate UART receive buffer&amp;quot;);
			k_delayed_work_submit(&amp;amp;uart_work,
					      UART_WAIT_FOR_BUF_DELAY);
			return;
		}

		uart_rx_enable(uart, buf-&amp;gt;data, sizeof(buf-&amp;gt;data),
			       UART_WAIT_FOR_RX);

		break;

	case UART_RX_BUF_REQUEST:
		buf = k_malloc(sizeof(*buf));
		if (buf) {
			buf-&amp;gt;len = 0;
			uart_rx_buf_rsp(uart, buf-&amp;gt;data, sizeof(buf-&amp;gt;data));
		} else {
			LOG_WRN(&amp;quot;Not able to allocate UART receive buffer&amp;quot;);
		}

		break;

	case UART_RX_BUF_RELEASED:
		buf = CONTAINER_OF(evt-&amp;gt;data.rx_buf.buf, struct uart_data_t,
				   data);
		if (buf_release &amp;amp;&amp;amp; (current_buf != evt-&amp;gt;data.rx_buf.buf)) {
			k_free(buf);
			buf_release = false;
			current_buf = NULL;
		}

		break;

	case UART_TX_ABORTED:
			if (!aborted_buf) {
				aborted_buf = (uint8_t *)evt-&amp;gt;data.tx.buf;
			}

			aborted_len += evt-&amp;gt;data.tx.len;
			buf = CONTAINER_OF(aborted_buf, struct uart_data_t,
					   data);

			uart_tx(uart, &amp;amp;buf-&amp;gt;data[aborted_len],
				buf-&amp;gt;len - aborted_len, SYS_FOREVER_MS);

		break;

	default:
		break;
	}
}

static void uart_work_handler(struct k_work *item)
{
	struct uart_data_t *buf;

	buf = k_malloc(sizeof(*buf));
	if (buf) {
		buf-&amp;gt;len = 0;
	} else {
		LOG_WRN(&amp;quot;Not able to allocate UART receive buffer&amp;quot;);
		k_delayed_work_submit(&amp;amp;uart_work, UART_WAIT_FOR_BUF_DELAY);
		return;
	}

	uart_rx_enable(uart, buf-&amp;gt;data, sizeof(buf-&amp;gt;data), UART_WAIT_FOR_RX);
}

static int uart_init(void)
{
	int err;
	struct uart_data_t *rx;

	uart = device_get_binding(DT_LABEL(DT_NODELABEL(uart0)));
	if (!uart) {
		return -ENXIO;
	}

	rx = k_malloc(sizeof(*rx));
	if (rx) {
		rx-&amp;gt;len = 0;
	} else {
		return -ENOMEM;
	}

	k_delayed_work_init(&amp;amp;uart_work, uart_work_handler);

	err = uart_callback_set(uart, uart_cb, NULL);
	if (err) {
		return err;
	}

	return uart_rx_enable(uart, rx-&amp;gt;data, sizeof(rx-&amp;gt;data), 50);
}

static void connected(struct bt_conn *conn, uint8_t err)
{
	char addr[BT_ADDR_LE_STR_LEN];

	if (err) {
		LOG_ERR(&amp;quot;Connection failed (err %u)&amp;quot;, err);
		return;
	}

	bt_addr_le_to_str(bt_conn_get_dst(conn), addr, sizeof(addr));
	LOG_INF(&amp;quot;Connected %s&amp;quot;, log_strdup(addr));

	current_conn = bt_conn_ref(conn);

	dk_set_led_on(CON_STATUS_LED);
}

static void disconnected(struct bt_conn *conn, uint8_t reason)
{
	char addr[BT_ADDR_LE_STR_LEN];

	bt_addr_le_to_str(bt_conn_get_dst(conn), addr, sizeof(addr));

	LOG_INF(&amp;quot;Disconnected: %s (reason %u)&amp;quot;, log_strdup(addr), reason);

	if (auth_conn) {
		bt_conn_unref(auth_conn);
		auth_conn = NULL;
	}

	if (current_conn) {
		bt_conn_unref(current_conn);
		current_conn = NULL;
		dk_set_led_off(CON_STATUS_LED);
	}
}

#ifdef CONFIG_BT_NUS_SECURITY_ENABLED
static void security_changed(struct bt_conn *conn, bt_security_t level,
			     enum bt_security_err err)
{
	char addr[BT_ADDR_LE_STR_LEN];

	bt_addr_le_to_str(bt_conn_get_dst(conn), addr, sizeof(addr));

	if (!err) {
		LOG_INF(&amp;quot;Security changed: %s level %u&amp;quot;, log_strdup(addr),
			level);
	} else {
		LOG_WRN(&amp;quot;Security failed: %s level %u err %d&amp;quot;, log_strdup(addr),
			level, err);
	}
}
#endif

static struct bt_conn_cb conn_callbacks = {
	.connected    = connected,
	.disconnected = disconnected,
#ifdef CONFIG_BT_NUS_SECURITY_ENABLED
	.security_changed = security_changed,
#endif
};

#if defined(CONFIG_BT_NUS_SECURITY_ENABLED)
static void auth_passkey_display(struct bt_conn *conn, unsigned int passkey)
{
	char addr[BT_ADDR_LE_STR_LEN];

	bt_addr_le_to_str(bt_conn_get_dst(conn), addr, sizeof(addr));

	LOG_INF(&amp;quot;Passkey for %s: %06u&amp;quot;, log_strdup(addr), passkey);
}

static void auth_passkey_confirm(struct bt_conn *conn, unsigned int passkey)
{
	char addr[BT_ADDR_LE_STR_LEN];

	auth_conn = bt_conn_ref(conn);

	bt_addr_le_to_str(bt_conn_get_dst(conn), addr, sizeof(addr));

	LOG_INF(&amp;quot;Passkey for %s: %06u&amp;quot;, log_strdup(addr), passkey);
	LOG_INF(&amp;quot;Press Button 1 to confirm, Button 2 to reject.&amp;quot;);
}


static void auth_cancel(struct bt_conn *conn)
{
	char addr[BT_ADDR_LE_STR_LEN];

	bt_addr_le_to_str(bt_conn_get_dst(conn), addr, sizeof(addr));

	LOG_INF(&amp;quot;Pairing cancelled: %s&amp;quot;, log_strdup(addr));
}


static void pairing_confirm(struct bt_conn *conn)
{
	char addr[BT_ADDR_LE_STR_LEN];

	bt_addr_le_to_str(bt_conn_get_dst(conn), addr, sizeof(addr));

	bt_conn_auth_pairing_confirm(conn);

	LOG_INF(&amp;quot;Pairing confirmed: %s&amp;quot;, log_strdup(addr));
}


static void pairing_complete(struct bt_conn *conn, bool bonded)
{
	char addr[BT_ADDR_LE_STR_LEN];

	bt_addr_le_to_str(bt_conn_get_dst(conn), addr, sizeof(addr));

	LOG_INF(&amp;quot;Pairing completed: %s, bonded: %d&amp;quot;, log_strdup(addr),
		bonded);
}


static void pairing_failed(struct bt_conn *conn, enum bt_security_err reason)
{
	char addr[BT_ADDR_LE_STR_LEN];

	bt_addr_le_to_str(bt_conn_get_dst(conn), addr, sizeof(addr));

	LOG_INF(&amp;quot;Pairing failed conn: %s, reason %d&amp;quot;, log_strdup(addr),
		reason);
}


static struct bt_conn_auth_cb conn_auth_callbacks = {
	.passkey_display = auth_passkey_display,
	.passkey_confirm = auth_passkey_confirm,
	.cancel = auth_cancel,
	.pairing_confirm = pairing_confirm,
	.pairing_complete = pairing_complete,
	.pairing_failed = pairing_failed
};
#else
static struct bt_conn_auth_cb conn_auth_callbacks;
#endif

static void bt_receive_cb(struct bt_conn *conn, const uint8_t *const data,
			  uint16_t len)
{
	int err;
	char addr[BT_ADDR_LE_STR_LEN] = {0};

	bt_addr_le_to_str(bt_conn_get_dst(conn), addr, ARRAY_SIZE(addr));

	LOG_INF(&amp;quot;Received data from: %s&amp;quot;, log_strdup(addr));

	for (uint16_t pos = 0; pos != len;) {
		struct uart_data_t *tx = k_malloc(sizeof(*tx));

		if (!tx) {
			LOG_WRN(&amp;quot;Not able to allocate UART send data buffer&amp;quot;);
			return;
		}

		/* Keep the last byte of TX buffer for potential LF char. */
		size_t tx_data_size = sizeof(tx-&amp;gt;data) - 1;

		if ((len - pos) &amp;gt; tx_data_size) {
			tx-&amp;gt;len = tx_data_size;
		} else {
			tx-&amp;gt;len = (len - pos);
		}

		memcpy(tx-&amp;gt;data, &amp;amp;data[pos], tx-&amp;gt;len);

		pos += tx-&amp;gt;len;

		/* Append the LF character when the CR character triggered
		 * transmission from the peer.
		 */
		if ((pos == len) &amp;amp;&amp;amp; (data[len - 1] == &amp;#39;\r&amp;#39;)) {
			tx-&amp;gt;data[tx-&amp;gt;len] = &amp;#39;\n&amp;#39;;
			tx-&amp;gt;len++;
		}

		err = uart_tx(uart, tx-&amp;gt;data, tx-&amp;gt;len, SYS_FOREVER_MS);
		if (err) {
			k_fifo_put(&amp;amp;fifo_uart_tx_data, tx);
		}
	}
}

static struct bt_nus_cb nus_cb = {
	.received = bt_receive_cb,
};

void error(void)
{
	dk_set_leds_state(DK_ALL_LEDS_MSK, DK_NO_LEDS_MSK);

	while (true) {
		/* Spin for ever */
		k_sleep(K_MSEC(1000));
	}
}

static void num_comp_reply(bool accept)
{
	if (accept) {
		bt_conn_auth_passkey_confirm(auth_conn);
		LOG_INF(&amp;quot;Numeric Match, conn %p&amp;quot;, auth_conn);
	} else {
		bt_conn_auth_cancel(auth_conn);
		LOG_INF(&amp;quot;Numeric Reject, conn %p&amp;quot;, auth_conn);
	}

	bt_conn_unref(auth_conn);
	auth_conn = NULL;
}

void button_changed(uint32_t button_state, uint32_t has_changed)
{
	uint32_t buttons = button_state &amp;amp; has_changed;

	if (auth_conn) {
		if (buttons &amp;amp; KEY_PASSKEY_ACCEPT) {
			num_comp_reply(true);
		}

		if (buttons &amp;amp; KEY_PASSKEY_REJECT) {
			num_comp_reply(false);
		}
	}
}

static void configure_gpio(void)
{
	int err;

	err = dk_buttons_init(button_changed);
	if (err) {
		LOG_ERR(&amp;quot;Cannot init buttons (err: %d)&amp;quot;, err);
	}

	err = dk_leds_init();
	if (err) {
		LOG_ERR(&amp;quot;Cannot init LEDs (err: %d)&amp;quot;, err);
	}
}

void main(void)
{
	int blink_status = 0;
	int err = 0;

	configure_gpio();

	err = uart_init();
	if (err) {
		error();
	}

	bt_conn_cb_register(&amp;amp;conn_callbacks);

    /* Initialize the Bluetooth mcumgr transport. */
	smp_bt_register();

	os_mgmt_register_group();
	
	img_mgmt_register_group();

	if (IS_ENABLED(CONFIG_BT_NUS_SECURITY_ENABLED)) {
		bt_conn_auth_cb_register(&amp;amp;conn_auth_callbacks);
	}

	err = bt_enable(NULL);
	if (err) {
		error();
	}

	LOG_INF(&amp;quot;Bluetooth initialized&amp;quot;);

	k_sem_give(&amp;amp;ble_init_ok);

	if (IS_ENABLED(CONFIG_SETTINGS)) {
		settings_load();
	}

	err = bt_nus_init(&amp;amp;nus_cb);
	if (err) {
		LOG_ERR(&amp;quot;Failed to initialize UART service (err: %d)&amp;quot;, err);
		return;
	}

	err = bt_le_adv_start(BT_LE_ADV_CONN, ad, ARRAY_SIZE(ad), sd,
			      ARRAY_SIZE(sd));
	if (err) {
		LOG_ERR(&amp;quot;Advertising failed to start (err %d)&amp;quot;, err);
	}

	printk(&amp;quot;Starting Nordic UART service example\n&amp;quot;);

	for (;;) {
		dk_set_led(RUN_STATUS_LED, (++blink_status) % 2);
		k_sleep(K_MSEC(RUN_LED_BLINK_INTERVAL));
	}
}

void ble_write_thread(void)
{
	/* Don&amp;#39;t go any further until BLE is initialized */
	k_sem_take(&amp;amp;ble_init_ok, K_FOREVER);

	for (;;) {
		/* Wait indefinitely for data to be sent over bluetooth */
		struct uart_data_t *buf = k_fifo_get(&amp;amp;fifo_uart_rx_data,
						     K_FOREVER);

		if (bt_nus_send(NULL, buf-&amp;gt;data, buf-&amp;gt;len)) {
			LOG_WRN(&amp;quot;Failed to send data over BLE connection&amp;quot;);
		}

		k_free(buf);
	}
}

K_THREAD_DEFINE(ble_write_thread_id, STACKSIZE, ble_write_thread, NULL, NULL,
		NULL, PRIORITY, 0, 0);
&lt;/pre&gt;&lt;/p&gt;
&lt;p&gt;&amp;nbsp;&lt;/p&gt;
&lt;p&gt;&lt;a href="https://devzone.nordicsemi.com/cfs-file/__key/communityserver-discussions-components-files/4/5811.peripheral_5F00_uart_5F00_DFU_5F00_ncs1.5.0.zip"&gt;devzone.nordicsemi.com/.../5811.peripheral_5F00_uart_5F00_DFU_5F00_ncs1.5.0.zip&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;&lt;/p&gt;
&lt;p&gt;-Amanda&amp;nbsp;&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item><item><title>RE: nRF52840 DFU  issue(ncs1.5.0).</title><link>https://devzone.nordicsemi.com/thread/318338?ContentTypeID=1</link><pubDate>Fri, 02 Jul 2021 06:40:58 GMT</pubDate><guid isPermaLink="false">137ad170-7792-4731-bb38-c0d22fbe4515:c16273e7-16e1-4423-8c1d-66c18d7e4c71</guid><dc:creator>xinjiang</dc:creator><description>&lt;p&gt;Does anyone answer? Or you can give a demo that can successfully dfu.&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item></channel></rss>