FOTA over Bluetooth LE

Question

Hi all,

I am trying to perform a FOTA upgrade over BLE with an nRF52832.

I started with the zephyr sample "peripheral_dis" at zephyr/samples/bluetooth, and then followed all the steps here:

https://developer.nordicsemi.com/nRF_Connect_SDK/doc/2.1.2/nrf/ug_nrf52.html#fota-over-bluetooth-le

I'm using the app nRF Connect on my tablet, when connecting to my device I see the DFU option and then I select the app_update.bin file.

it gets stacked in "Connecting".

My code:

main.c

#include <zephyr/types.h>
#include <stddef.h>
#include <string.h>
#include <errno.h>
#include <zephyr/sys/printk.h>
#include <zephyr/sys/byteorder.h>
#include <zephyr/zephyr.h>

#include <zephyr/bluetooth/bluetooth.h>
#include <zephyr/bluetooth/hci.h>
#include <zephyr/bluetooth/conn.h>
#include <zephyr/bluetooth/uuid.h>
#include <zephyr/bluetooth/gatt.h>
#include <zephyr/settings/settings.h>

static const struct bt_data ad[] = {
	BT_DATA_BYTES(BT_DATA_FLAGS, (BT_LE_AD_GENERAL | BT_LE_AD_NO_BREDR)),
	BT_DATA_BYTES(BT_DATA_UUID16_ALL, BT_UUID_16_ENCODE(BT_UUID_DIS_VAL)),
};

static void connected(struct bt_conn *conn, uint8_t err)
{
	if (err) {
		printk("Connection failed (err 0x%02x)\n", err);
	} else {
		printk("Connected\n");
	}
}

static void disconnected(struct bt_conn *conn, uint8_t reason)
{
	printk("Disconnected (reason 0x%02x)\n", reason);
}

BT_CONN_CB_DEFINE(conn_callbacks) = {
	.connected = connected,
	.disconnected = disconnected,
};

static int settings_runtime_load(void)
{
#if defined(CONFIG_BT_DIS_SETTINGS)
	settings_runtime_set("bt/dis/model",
			     "Zephyr Model 2",
			     sizeof("Zephyr Model 3"));
	settings_runtime_set("bt/dis/manuf",
			     "Zephyr Manufacturer",
			     sizeof("Zephyr Manufacturer"));
#if defined(CONFIG_BT_DIS_SERIAL_NUMBER)
	settings_runtime_set("bt/dis/serial",
			     CONFIG_BT_DIS_SERIAL_NUMBER_STR,
			     sizeof(CONFIG_BT_DIS_SERIAL_NUMBER_STR));
#endif
#if defined(CONFIG_BT_DIS_SW_REV)
	settings_runtime_set("bt/dis/sw",
			     CONFIG_BT_DIS_SW_REV_STR,
			     sizeof(CONFIG_BT_DIS_SW_REV_STR));
#endif
#if defined(CONFIG_BT_DIS_FW_REV)
	settings_runtime_set("bt/dis/fw",
			     CONFIG_BT_DIS_FW_REV_STR,
			     sizeof(CONFIG_BT_DIS_FW_REV_STR));
#endif
#if defined(CONFIG_BT_DIS_HW_REV)
	settings_runtime_set("bt/dis/hw",
			     CONFIG_BT_DIS_HW_REV_STR,
			     sizeof(CONFIG_BT_DIS_HW_REV_STR));
#endif
#endif
	return 0;
}

void main(void)
{
	int err;
	
	os_mgmt_register_group();
	img_mgmt_register_group();
	smp_bt_register();

	err = bt_enable(NULL);
	if (err) {
		printk("Bluetooth init failed (err %d)\n", err);
		return;
	}

	if (IS_ENABLED(CONFIG_BT_SETTINGS)) {
		settings_load();
	}

	settings_runtime_load();

	printk("Bluetooth initialized\n");

	err = bt_le_adv_start(BT_LE_ADV_CONN_NAME, ad, ARRAY_SIZE(ad), NULL, 0);
	if (err) {
		printk("Advertising failed to start (err %d)\n", err);
		return;
	}

	printk("Advertising successfully started\n");
}

prj.conf

CONFIG_BT=y
CONFIG_BT_PERIPHERAL=y

CONFIG_BT_DIS=y
CONFIG_BT_DIS_PNP=n
CONFIG_BT_DIS_MODEL="Zephyr Model 3"
CONFIG_BT_DIS_MANUF="Zephyr"
CONFIG_BT_DIS_SERIAL_NUMBER=y
CONFIG_BT_DIS_FW_REV=y
CONFIG_BT_DIS_HW_REV=y
CONFIG_BT_DIS_SW_REV=y
CONFIG_BT_DIS_SERIAL_NUMBER_STR="Zephyr Serial"
CONFIG_BT_DIS_FW_REV_STR="Zephyr Firmware"
CONFIG_BT_DIS_HW_REV_STR="Zephyr Hardware"
CONFIG_BT_DIS_SW_REV_STR="Zephyr Software"

CONFIG_BT_DEVICE_NAME="DIS peripheral"

# Below is setup to let DIS information be read from settings
CONFIG_BT_SETTINGS=y
CONFIG_SETTINGS_RUNTIME=y
CONFIG_SETTINGS=y
CONFIG_SETTINGS_NONE=y

CONFIG_BT_DIS_SETTINGS=y


CONFIG_BOOTLOADER_MCUBOOT=y
CONFIG_MCUBOOT_GENERATE_CONFIRMED_IMAGE=y
CONFIG_MCUMGR=y
CONFIG_MCUMGR_CMD_IMG_MGMT=y
CONFIG_MCUMGR_CMD_OS_MGMT=y
CONFIG_MCUMGR_SMP_BT=y

It's the first time I try this so I'm not sure how to continue.

Regards,

Pablo.