Timer stops working after a while

I am working on a project in which I am using code from central and peripheral hr example. I only need the scanning and advertising part and not HRS so I removed the HRS code. I also want to connect my board with a phone to config some settings like ID, calibration, etc. For this, I have also added a code from the Peripheral UART example. After combining these codes, the code should work like this.

On startup, MCU will wait for a mobile to connect with it and when a disconnected() callback happens, MCU will run in scan and adv mode. But what I observe is that in main(), my timer stops working when I call a function bt_update_packet(). When I am commenting bt_update_packet(), the timer continues to run without a problem. This is only happening when I am combining the two examples mentioned above. When I am not including peripheral uart code in my project timer is working fine and bt_update_packet() also happens to run without a problem. Can anybody help? I am using nRF connect sdk 2.1.2 and nRF52832 dev kit.

Here is my code and project configuration. Any help would be very appreciated. Thanks in advance!

#include <zephyr/zephyr.h>
#include <zephyr/drivers/flash.h>
#include <zephyr/storage/flash_map.h>
#include <zephyr/device.h>
#include <zephyr/devicetree.h>

#include "include/adc.h"
#include "include/application.h"
#include "include/temp_sensor.h"
#include "include/bt.h"
#include "include/board_config.h"
#include "include/slave_param.h"

#pragma region "FLASH Configuration"
#ifdef CONFIG_TRUSTED_EXECUTION_NONSECURE
#define FLASH_TEST_LABEL image_1_nonsecure
#else
#define FLASH_TEST_LABEL image_1
#endif
#pragma endregion

/************************
 * Macros
 ************************/
#define RUN_STATUS_LED 				DK_LED1
#define SLEEP_TIME_MS 				100
#define TIMER_INTERVAL_MSEC 		1000
#define FLASH_TEST_OFFSET 			FLASH_AREA_OFFSET(FLASH_TEST_LABEL)
#define FLASH_TEST_DEVICE 			FLASH_AREA_DEVICE(FLASH_TEST_LABEL)
#define FLASH_PAGE_SIZE 			4096
#define TEST_DATA_WORD_0 			0x1234
#define TEST_DATA_WORD_1 			0xabcd
#define TEST_DATA_WORD_2 			0xa1b1
#define TEST_DATA_WORD_3 			0xc1d1
#define FLASH_TEST_OFFSET2 			0x41234
#define FLASH_TEST_PAGE_IDX 		37
#define CUSTOM_MAC_ADDR_LEN			15		//13 (without ID number)

#pragma region "BT LE Configuration"

uint8_t advData[MAX_NUM_OF_BYTES] = {};
static struct bt_data ad[] = {
	BT_DATA(BT_DATA_MANUFACTURER_DATA, advData, sizeof(advData)),
};

static struct bt_data sd[] = {
	BT_DATA_BYTES(BT_DATA_NAME_COMPLETE, CONFIG_BT_DEVICE_NAME)
};

#pragma endregion

/************************
 * Global Variables
 ************************/
char mac_address_str[CUSTOM_MAC_ADDR_LEN];
uint8_t sdData[MAX_NUM_OF_BYTES] = {};
uint8_t *pSdData = sdData;
volatile bool uartConnectFlag = false;
volatile bool configFlag = false;
uint8_t counter = 0;
volatile bool timerUARTFlag = false;
volatile bool advUpdateFlag = false;
volatile bool scanStopFlag = false;
volatile bool timerStartFlag = false;

/************************
 * Handlers
 ************************/
#pragma region "Scanning"
static bool data_cb(struct bt_data *data, void *user_data)
{
	*pSdData = user_data;
	uint8_t len;

	switch (data->type)
	{
	case BT_DATA_MANUFACTURER_DATA:
		len = MIN(data->data_len, DATABYTES - 1);
		memcpy(pSdData, data->data, len);
		pSdData[len] = '\0';
		return false;
	default:
		return true;
	}
}

static void scan_recv(const struct bt_le_scan_recv_info *info, struct net_buf_simple *buf)
{
	char le_addr[BT_ADDR_LE_STR_LEN];
	uint8_t parseDataBytes[DATABYTES];
	uint16_t data_len;

	memset(parseDataBytes, 0, sizeof(parseDataBytes));
	data_len = buf->len;
	bt_data_parse(buf, data_cb, parseDataBytes);

	bt_addr_le_to_str(info->addr, le_addr, sizeof(le_addr));
	
	if (strncmp(le_addr, "E0:FE:52:79:8B:7F", 17) == 0)
	{
		// printk("Slave SCAN -> Master device: %s, AD data len: %u  Databytes:\n"
		// 		"%x %x %x %x %x %x %x %x %x %x %x %x %x %x %x %x %x %x %x %x %x %x %x %x %x %x %x %x %x\n\n",
		// 		le_addr, data_len,
		// 		sdData[0], sdData[1], sdData[2], sdData[3], sdData[4], sdData[5], sdData[6], sdData[7], sdData[8],
		// 		sdData[9], sdData[10], sdData[11], sdData[12], sdData[13], sdData[14], sdData[15], sdData[16], sdData[17],
		// 		sdData[18], sdData[19], sdData[20], sdData[21], sdData[22], sdData[23], sdData[24], sdData[25], sdData[26],
		// 		sdData[27], sdData[28]);

		// static uint16_t scanCount = 0;
		// printk("Scan count %d\n", scanCount++);
		gpio_pin_toggle_dt(&leds_array[3]);
	}
}

static struct bt_le_scan_cb scan_callbacks = {
	.recv = scan_recv,
};

struct bt_le_scan_param scan_param = {
	.type = BT_LE_SCAN_TYPE_PASSIVE,
	.options = BT_LE_SCAN_OPT_NONE,
	.interval = BT_GAP_SCAN_FAST_INTERVAL,
	.window = BT_GAP_SCAN_FAST_INTERVAL, 		// changed from BT_GAP_SCAN_FAST_WINDOW
};
#pragma endregion

void timer_ISR(void)
{
	// sysFlags.timer_10ms_flag = true;
	sysFlags.timer_10ms_count++;
	if ((sysFlags.timer_10ms_count % ADC_TIMER_COUNTS) == 0)
	{
		sysFlags.adc_sample_task = true;
	}

	if ((sysFlags.timer_10ms_count % BT_ADV_TIMER_COUNTS) == 0)
	{
		sysFlags.bt_adv_task = true;
	}

	if (sysFlags.timer_10ms_count == 100)
	{
		sysFlags.timer_10ms_count = 0;
		sysFlags.timer_1000ms_flag = true;
	}
}

void bt_update_packet(void)
{
	int res;

	res = bt_le_adv_stop();
	if (res)
	{
		printk("************ADV STOP failed!************ bt_cb (err %d)\n", res);
		return;
	}
	printk("************ADV STOP successful!************\n");
	
	slave.soc_temp = LOBYTE(nrf52_chip_temperature());
	advData[0] = read_slave_id();
	advData[1] = slave.counter++;
	advData[2] = slave.cellsVoltage[0].adc_m_16bits.adc_hiByte;
	advData[3] = slave.cellsVoltage[0].adc_m_16bits.adc_loByte;
	advData[4] = slave.cellsVoltage[1].adc_m_16bits.adc_hiByte;
	advData[5] = slave.cellsVoltage[1].adc_m_16bits.adc_loByte;
	advData[6] = slave.cellsVoltage[2].adc_m_16bits.adc_hiByte;
	advData[7] = slave.cellsVoltage[2].adc_m_16bits.adc_loByte;
	advData[8] = slave.cellsVoltage[3].adc_m_16bits.adc_hiByte;
	advData[9] = slave.cellsVoltage[3].adc_m_16bits.adc_loByte;
	advData[10] = slave.cellsTemperature[0].adc_m_16bits.adc_loByte;
	advData[11] = slave.cellsTemperature[1].adc_m_16bits.adc_loByte;
	advData[12] = slave.cellsTemperature[2].adc_m_16bits.adc_loByte;
	advData[13] = slave.cellsTemperature[3].adc_m_16bits.adc_loByte;
	advData[14] = slave.soc_temp;
	advData[15] = slave.current[1];
	advData[16] = slave.current[0];
	advData[17] = slave.cell_soc[0];
	advData[18] = slave.cell_soc[1];
	advData[19] = slave.cell_soc[2];
	advData[20] = slave.cell_soc[3];
	advData[21] = slave.status;
	for (uint8_t i = 22; i < sizeof(advData); i++)
	{
		advData[i] = 0xB0 + (i - 21); // RFU bytes
	}

	// updating adv data
	ad[0].data = advData;
	ad[0].data_len = sizeof(advData);
	ad[0].type = BT_DATA_MANUFACTURER_DATA;

	// updating sd data
	get_mac_address(mac_address_str, sizeof(mac_address_str));
	sd[0].data = mac_address_str;
	sd[0].data_len = sizeof(mac_address_str);
	sd[0].type = BT_DATA_NAME_COMPLETE;

	res = bt_le_adv_start(BT_LE_ADV_CONN, ad, ARRAY_SIZE(ad), sd, ARRAY_SIZE(sd));
	if (res)
	{
		printk("Advertising failed to start bt_cb (err %d)\n", res);
		return;
	}
	printk("ADV started again!\n");
	// printk("Slave ADV  = %x %x %x %x %x %x %x %x %x %x %x %x %x %x %x %x %x %x %x %x %x %x %x %x %x %x %x %x %x\n\n",
	// 		advData[0], advData[1], advData[2], advData[3], advData[4], advData[5], advData[6], advData[7], advData[8],
	// 		advData[9], advData[10], advData[11], advData[12], advData[13], advData[14], advData[15], advData[16], advData[17],
	// 		advData[18], advData[19], advData[20], advData[21], advData[22], advData[23], advData[24], advData[25], advData[26],
	// 		advData[27], advData[28]);
}

K_TIMER_DEFINE(htimer, &timer_ISR, NULL);

#pragma region "BLE UART"
#include "uart_async_adapter.h"

#include <zephyr/types.h>
#include <zephyr/kernel.h>
#include <zephyr/drivers/uart.h>
#include <zephyr/usb/usb_device.h>

#include <zephyr/device.h>
#include <zephyr/devicetree.h>
#include <soc.h>

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

#include <bluetooth/services/nus.h>

#include <dk_buttons_and_leds.h>

#include <zephyr/settings/settings.h>

#include <stdio.h>

#include <zephyr/logging/log.h>

#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_LED_BLINK_INTERVAL 1000

#define CON_STATUS_LED DK_LED1

#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 = DEVICE_DT_GET(DT_CHOSEN(nordic_nus_uart));
static struct k_work_delayable 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);


#if CONFIG_BT_NUS_UART_ASYNC_ADAPTER
UART_ASYNC_ADAPTER_INST_DEFINE(async_adapter);
#else
static const struct device *const async_adapter;
#endif

static void uart_cb(const struct device *dev, struct uart_event *evt, void *user_data)
{
	ARG_UNUSED(dev);

	static size_t aborted_len;
	struct uart_data_t *buf;
	static uint8_t *aborted_buf;
	static bool disable_req;

	switch (evt->type) {
	case UART_TX_DONE:
		LOG_DBG("UART_TX_DONE");
		if ((evt->data.tx.len == 0) ||
		    (!evt->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->data.tx.buf, struct uart_data_t,
					   data);
		}

		k_free(buf);

		buf = k_fifo_get(&fifo_uart_tx_data, K_NO_WAIT);
		if (!buf) {
			return;
		}

		if (uart_tx(uart, buf->data, buf->len, SYS_FOREVER_MS)) {
			LOG_WRN("Failed to send data over UART");
		}

		break;

	case UART_RX_RDY:
		LOG_DBG("UART_RX_RDY");
		buf = CONTAINER_OF(evt->data.rx.buf, struct uart_data_t, data);
		buf->len += evt->data.rx.len;

		if (disable_req) {
			return;
		}

		if ((evt->data.rx.buf[buf->len - 1] == '\n') ||
		    (evt->data.rx.buf[buf->len - 1] == '\r')) {
			disable_req = true;
			uart_rx_disable(uart);
		}

		break;

	case UART_RX_DISABLED:
		LOG_DBG("UART_RX_DISABLED");
		disable_req = false;

		buf = k_malloc(sizeof(*buf));
		if (buf) {
			buf->len = 0;
		} else {
			LOG_WRN("Not able to allocate UART receive buffer");
			k_work_reschedule(&uart_work, UART_WAIT_FOR_BUF_DELAY);
			return;
		}

		uart_rx_enable(uart, buf->data, sizeof(buf->data),
			       UART_WAIT_FOR_RX);

		break;

	case UART_RX_BUF_REQUEST:
		LOG_DBG("UART_RX_BUF_REQUEST");
		buf = k_malloc(sizeof(*buf));
		if (buf) {
			buf->len = 0;
			uart_rx_buf_rsp(uart, buf->data, sizeof(buf->data));
		} else {
			LOG_WRN("Not able to allocate UART receive buffer");
		}

		break;

	case UART_RX_BUF_RELEASED:
		LOG_DBG("UART_RX_BUF_RELEASED");
		buf = CONTAINER_OF(evt->data.rx_buf.buf, struct uart_data_t,
				   data);

		if (buf->len > 0) {
			k_fifo_put(&fifo_uart_rx_data, buf);
		} else {
			k_free(buf);
		}

		break;

	case UART_TX_ABORTED:
		LOG_DBG("UART_TX_ABORTED");
		if (!aborted_buf) {
			aborted_buf = (uint8_t *)evt->data.tx.buf;
		}

		aborted_len += evt->data.tx.len;
		buf = CONTAINER_OF(aborted_buf, struct uart_data_t,
				   data);

		uart_tx(uart, &buf->data[aborted_len],
			buf->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->len = 0;
	} else {
		printk("Not able to allocate UART receive buffer");
		k_work_reschedule(&uart_work, UART_WAIT_FOR_BUF_DELAY);
		return;
	}

	uart_rx_enable(uart, buf->data, sizeof(buf->data), UART_WAIT_FOR_RX);
}

static bool uart_test_async_api(const struct device *dev)
{
	const struct uart_driver_api *api =
			(const struct uart_driver_api *)dev->api;

	return (api->callback_set != NULL);
}

static int uart_init(void)
{
	int err;
	int pos;
	struct uart_data_t *rx;
	struct uart_data_t *tx;

	if (!device_is_ready(uart)) {
		return -ENODEV;
	}

	if (IS_ENABLED(CONFIG_USB_DEVICE_STACK)) {
		err = usb_enable(NULL);
		if (err && (err != -EALREADY)) {
			LOG_ERR("Failed to enable USB");
			return err;
		}
	}

	rx = k_malloc(sizeof(*rx));
	if (rx) {
		rx->len = 0;
	} else {
		return -ENOMEM;
	}

	k_work_init_delayable(&uart_work, uart_work_handler);


	if (IS_ENABLED(CONFIG_BT_NUS_UART_ASYNC_ADAPTER) && !uart_test_async_api(uart)) {
		/* Implement API adapter */
		uart_async_adapter_init(async_adapter, uart);
		uart = async_adapter;
	}

	err = uart_callback_set(uart, uart_cb, NULL);
	if (err) {
		LOG_ERR("Cannot initialize UART callback");
		return err;
	}

	if (IS_ENABLED(CONFIG_UART_LINE_CTRL)) {
		LOG_INF("Wait for DTR");
		while (true) {
			uint32_t dtr = 0;

			uart_line_ctrl_get(uart, UART_LINE_CTRL_DTR, &dtr);
			if (dtr) {
				break;
			}
			/* Give CPU resources to low priority threads. */
			k_sleep(K_MSEC(100));
		}
		LOG_INF("DTR set");
		err = uart_line_ctrl_set(uart, UART_LINE_CTRL_DCD, 1);
		if (err) {
			LOG_WRN("Failed to set DCD, ret code %d", err);
		}
		err = uart_line_ctrl_set(uart, UART_LINE_CTRL_DSR, 1);
		if (err) {
			LOG_WRN("Failed to set DSR, ret code %d", err);
		}
	}

	tx = k_malloc(sizeof(*tx));

	if (tx) {
		pos = snprintf(tx->data, sizeof(tx->data),
			       "Starting Nordic UART service example\r\n");

		if ((pos < 0) || (pos >= sizeof(tx->data))) {
			k_free(tx);
			LOG_ERR("snprintf returned %d", pos);
			return -ENOMEM;
		}

		tx->len = pos;
	} else {
		return -ENOMEM;
	}

	err = uart_tx(uart, tx->data, tx->len, SYS_FOREVER_MS);
	if (err) {
		LOG_ERR("Cannot display welcome message (err: %d)", err);
		return err;
	}

	return uart_rx_enable(uart, rx->data, sizeof(rx->data), 50);
}

static void connected(struct bt_conn *conn, uint8_t err)
{
	char addr[BT_ADDR_LE_STR_LEN];

	if (err) {
		printk("Connection failed (err %u)", err);
		return;
	}

	bt_addr_le_to_str(bt_conn_get_dst(conn), addr, sizeof(addr));
	printk("Connected %s", addr);

	current_conn = bt_conn_ref(conn);

	dk_set_led_on(CON_STATUS_LED);
	printk("\nconnected()\n");

	advUpdateFlag = false;
	timerStartFlag = false;
}

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));

	printk("Disconnected: %s (reason %u)", 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);
	}

	timerStartFlag = true;
}

#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("Security changed: %s level %u", addr, level);
	} else {
		LOG_WRN("Security failed: %s level %u err %d", addr,
			level, err);
	}
}
#endif

BT_CONN_CB_DEFINE(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("Passkey for %s: %06u", 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("Passkey for %s: %06u", addr, passkey);
	LOG_INF("Press Button 1 to confirm, Button 2 to reject.");
}


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("Pairing cancelled: %s", 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("Pairing completed: %s, bonded: %d", 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("Pairing failed conn: %s, reason %d", addr, reason);
}


static struct bt_conn_auth_cb conn_auth_callbacks = {
	.passkey_display = auth_passkey_display,
	.passkey_confirm = auth_passkey_confirm,
	.cancel = auth_cancel,
};

static struct bt_conn_auth_info_cb conn_auth_info_callbacks = {
	.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));

	printk("Received data from: %s", addr);

	for (uint16_t pos = 0; pos != len;) {
		struct uart_data_t *tx = k_malloc(sizeof(*tx));

		if (!tx) {
			printk("Not able to allocate UART send data buffer");
			return;
		}

		/* Keep the last byte of TX buffer for potential LF char. */
		size_t tx_data_size = sizeof(tx->data) - 1;

		if ((len - pos) > tx_data_size) {
			tx->len = tx_data_size;
		} else {
			tx->len = (len - pos);
		}

		memcpy(tx->data, &data[pos], tx->len);

		pos += tx->len;

		/* Append the LF character when the CR character triggered
		 * transmission from the peer.
		 */
		if ((pos == len) && (data[len - 1] == '\r')) {
			tx->data[tx->len] = '\n';
			tx->len++;
		}

		err = uart_tx(uart, tx->data, tx->len, SYS_FOREVER_MS);
		if (err) {
			k_fifo_put(&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));
	}
}

#ifdef CONFIG_BT_NUS_SECURITY_ENABLED
static void num_comp_reply(bool accept)
{
	if (accept) {
		bt_conn_auth_passkey_confirm(auth_conn);
		LOG_INF("Numeric Match, conn %p", (void *)auth_conn);
	} else {
		bt_conn_auth_cancel(auth_conn);
		LOG_INF("Numeric Reject, conn %p", (void *)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 & has_changed;

	if (auth_conn) {
		if (buttons & KEY_PASSKEY_ACCEPT) {
			num_comp_reply(true);
		}

		if (buttons & KEY_PASSKEY_REJECT) {
			num_comp_reply(false);
		}
	}
}
#endif /* CONFIG_BT_NUS_SECURITY_ENABLED */

static void configure_gpio(void)
{
	int err;

#ifdef CONFIG_BT_NUS_SECURITY_ENABLED
	err = dk_buttons_init(button_changed);
	if (err) {
		LOG_ERR("Cannot init buttons (err: %d)", err);
	}
#endif /* CONFIG_BT_NUS_SECURITY_ENABLED */

	err = dk_leds_init();
	if (err) {
		LOG_ERR("Cannot init LEDs (err: %d)", err);
	}
}
#pragma endregion

void main(void)
{
	int err;
	int blink_status = 0;

	err = uart_init();
	if (err)
	{
		error();
	}

	if (IS_ENABLED(CONFIG_BT_NUS_SECURITY_ENABLED))
	{
		err = bt_conn_auth_cb_register(&conn_auth_callbacks);
		if (err) {
			printk("Failed to register authorization callbacks.\n");
			return;
		}

		// err = bt_conn_auth_info_cb_register(&conn_auth_info_callbacks);
		// if (err) {
		// 	printk("Failed to register authorization info callbacks.\n");
		// 	return;
		// }
	}


	// DIP switches initialization
	dip_switch_init();

	// ADC initialization
	err = adc_init();
	if (err)
	{
		printk("ADC setup failed (error %d)\n", err);
		return;
	}

	// Reset advData buffer
	bt_data_bytes_reset(advData, sizeof(advData));

	printk("Starting Peripheral\n");
	
	// LEDs initialization (disable for ble uart)
	err = leds_init();
	if (err)
	{
		printk("LEDs init failed (err %d)\n", err);
		return;
	}	

	// BT initialization
	err = bt_enable(NULL);
	if (err)
	{
		return;
	}

	printk("\nBluetooth initialized\n");
	k_sem_give(&ble_init_ok);

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

	err = bt_nus_init(&nus_cb);
	if (err)
	{
		printk("\nFailed to initialize UART service (err: %d)\n", err);
		return;
	}

	// Get slave ID based on dip switch position and MAC addr
	get_mac_address(mac_address_str, sizeof(mac_address_str));

	//  Scanning initialization
	bt_le_scan_cb_register(&scan_callbacks);
	printk("Registered scan callbacks\n");


	// Starting adv
	err = bt_le_adv_start(BT_LE_ADV_CONN, ad, ARRAY_SIZE(ad), sd, ARRAY_SIZE(sd));
	if (err)
	{
		printk("Advertising failed to start (err %d)\n", err);
		return;
	}
	printk("Advertising started\n");

	// Timer initialization
	k_timer_start(&htimer, K_MSEC(1000), K_MSEC(10));

	static uint16_t countValue = 0;

	while (1)
	{
		if(timerStartFlag == true)
		{
			timerStartFlag = false;
			advUpdateFlag = true;
			printk("Timer started\n");

			err = bt_le_adv_stop();
			if (err)
			{
				printk("Stop adv failed (err %d)\n", err);
				return err;
			}
			printk("adv stopped\n");
			k_timer_start(&htimer, K_MSEC(1000), K_MSEC(10));
			err = bt_le_scan_start(&scan_param, data_cb);
			if (err)
			{
				printk("Start scanning failed (err %d)\n", err);
				return err;
			}
			printk("Scanning started\n");
		}

		if (sysFlags.timer_1000ms_flag == true)
		{
			sysFlags.timer_1000ms_flag = false;
			gpio_pin_toggle_dt(&leds_array[1]);
		}

		runApplication();

		if (sysFlags.bt_adv_task == true)
		{
			sysFlags.bt_adv_task = false;

			if(advUpdateFlag == true)
			{
				bt_update_packet();
				gpio_pin_toggle_dt(&leds_array[2]);
			}				
		}
	}
}

void ble_write_thread(void)
{
	// Don't go any further until BLE is initialized 
	k_sem_take(&ble_init_ok, K_FOREVER);

	for (;;)
	{
		// Wait indefinitely for data to be sent over bluetooth
		struct uart_data_t *buf = k_fifo_get(&fifo_uart_rx_data,
							K_FOREVER);

		if (bt_nus_send(NULL, buf->data, buf->len)) {
			LOG_WRN("Failed to send data over BLE connection");
		}

		k_free(buf);
	}
}

K_THREAD_DEFINE(ble_write_thread_id, STACKSIZE, ble_write_thread, NULL, NULL,
		NULL, PRIORITY, 0, 0);		

#
# Copyright (c) 2021 Nordic Semiconductor ASA
#
# SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
#

CONFIG_NCS_SAMPLES_DEFAULTS=y

CONFIG_BT=y
CONFIG_BT_PERIPHERAL=y
CONFIG_BT_CENTRAL=y
CONFIG_BT_DEVICE_NAME="Slave"      # -> SlaveXX_22476E
CONFIG_BT_DEVICE_APPEARANCE=832
CONFIG_BT_MAX_CONN=2
CONFIG_BT_MAX_PAIRED=2

CONFIG_BT_SMP=y

CONFIG_BT_SCAN=y
CONFIG_BT_SCAN_FILTER_ENABLE=y
CONFIG_BT_SCAN_UUID_CNT=1

CONFIG_BT_GATT_CLIENT=y
CONFIG_BT_GATT_DM=y

CONFIG_BT_HRS=y
CONFIG_BT_HRS_CLIENT=y

CONFIG_BT_SETTINGS=y
CONFIG_FLASH=y
CONFIG_FLASH_PAGE_LAYOUT=y
CONFIG_FLASH_MAP=y
CONFIG_NVS=y
CONFIG_SETTINGS=y

CONFIG_HEAP_MEM_POOL_SIZE=1024

CONFIG_DK_LIBRARY=y

CONFIG_SENSOR=y
# CONFIG_STDOUT_CONSOLE=y
# CONFIG_CBPRINTF_FP_SUPPORT=y
# CONFIG_TEMP_NRF5=y

# added for extended packet
#CONFIG_BT_EXT_ADV=y

# added for ADC
CONFIG_GPIO=y
CONFIG_ADC=y
# CONFIG_ADC_ASYNC=y
# CONFIG_CBPRINTF_FP_A_SUPPORT=y

# CONFIG_USE_SEGGER_RTT=y
# CONFIG_LOG=y
# CONFIG_LOG_BACKEND_SHOW_COLOR=y

# Enable multithreading
# CONFIG_MULTITHREADING=y

# TIMER 4
# CONFIG_NRFX_TIMER4=y

# Sensor
# CONFIG_SENSOR=y

# Enable internal oscillator
# CONFIG_CLOCK_CONTROL_NRF_K32SRC_RC=y

# Enable MPU
# CONFIG_ARM_MPU=y

# Enable hardware stack protection
# CONFIG_HW_STACK_PROTECTION=y

# Configure GPIO as pin RESET
# CONFIG_GPIO_AS_PINRESET=y

# FLASH configuration
CONFIG_MPU_ALLOW_FLASH_WRITE=y
CONFIG_SOC_FLASH_NRF_EMULATE_ONE_BYTE_WRITE_ACCESS=y

# Get MAC address
CONFIG_BT_HCI_VS_EXT=y



# ------------------------- For BLE uart -------------------------
# Enable the UART driver
CONFIG_UART_ASYNC_API=y
CONFIG_NRFX_UARTE0=y
CONFIG_SERIAL=y

# Make sure printk is printing to the UART console
CONFIG_CONSOLE=y
CONFIG_UART_CONSOLE=y

# This example requires more workqueue stack
# CONFIG_SYSTEM_WORKQUEUE_STACK_SIZE=2048       by default = 2048 (no need to include)

# Config logger
CONFIG_LOG=n    #y
CONFIG_USE_SEGGER_RTT=y
CONFIG_LOG_BACKEND_RTT=n    #y
CONFIG_LOG_BACKEND_UART=n

CONFIG_ASSERT=y

# Enable the NUS service
CONFIG_BT_NUS=y

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