nRF52833: MTU Exchange Fails and Connection Terminates

Question

Hello Team, I am working with nRF52833 configured as a BLE scanner using nRF Connect SDK for VS Code . Here is my prj.conf: # # Copyright (c) 2018 Nordic Semiconductor # # SPDX-License-Identifier: LicenseRef-Nordic-5-Clause # # ─── UART (Async, no console) ─────────────────────────────────────────────── CONFIG_SERIAL=y CONFIG_UART_ASYNC_API=y CONFIG_NRFX_UARTE0=y CONFIG_CONSOLE=n CONFIG_UART_CONSOLE=n # ─── FOR UART STOP and RESTART AT RUNTIME WHEN UART RX ERROR EVT TRIGGERS ───────────────────── CONFIG_PM_DEVICE=y CONFIG_PM_DEVICE_RUNTIME=y # ─── BLE Stack (Central / Scanner) ────────────────────────────────────────── CONFIG_BT=y CONFIG_BT_CENTRAL=y CONFIG_BT_GATT_CLIENT=y CONFIG_BT_SMP=y # BLE NCS modules CONFIG_BT_NUS_CLIENT=y CONFIG_BT_SCAN=y CONFIG_BT_SCAN_FILTER_ENABLE=y CONFIG_BT_SCAN_UUID_CNT=1 CONFIG_BT_GATT_DM=y # MTU / buffer sizing for 40-byte chunks CONFIG_BT_L2CAP_TX_MTU=247 CONFIG_BT_BUF_ACL_TX_SIZE=251 CONFIG_BT_BUF_ACL_RX_SIZE=251 CONFIG_BT_CTLR_DATA_LENGTH_MAX=251 # BLE stack sizes CONFIG_BT_RX_STACK_SIZE=4096 # Reduce BLE log noise — only errors CONFIG_BT_LOG_LEVEL_ERR=y # ─── Stack / Heap ──────────────────────────────────────────────────────────── CONFIG_MAIN_STACK_SIZE=4096 CONFIG_SYSTEM_WORKQUEUE_STACK_SIZE=4096 CONFIG_HEAP_MEM_POOL_SIZE=4096 # ─── RTT Logging (no UART backend) ────────────────────────────────────────── CONFIG_LOG=y CONFIG_USE_SEGGER_RTT=y CONFIG_LOG_BACKEND_RTT=y CONFIG_LOG_BACKEND_UART=n CONFIG_LOG_PRINTK=y # 23rd March 2026, RTT BUFFER SIZE increased for crash log capture CONFIG_SEGGER_RTT_BUFFER_SIZE_UP=4096 # ─── GPIO / SPI (needed for nRF21540 FEM) ─────────────────────────────────── CONFIG_GPIO=y CONFIG_SPI=y # ─── RTC Calendar ──────────────────────────────────────────────────────────── CONFIG_RTC=y CONFIG_RTC_UPDATE=y # ─── Watchdog ──────────────────────────────────────────────────────────────── CONFIG_WATCHDOG=y CONFIG_REBOOT=y # ─── Clock (RC low-frequency, 500 ppm) ─────────────────────────────────────── CONFIG_CLOCK_CONTROL_NRF_K32SRC_RC=y CONFIG_CLOCK_CONTROL_NRF_K32SRC_500PPM=y # ─── Range Extender: nRF21540 FEM ──────────────────────────────────────────── CONFIG_MPSL=y CONFIG_MPSL_FEM=y CONFIG_MPSL_FEM_NRF21540_GPIO_SPI=y CONFIG_MPSL_FEM_NRF21540_TX_GAIN_DB=20 CONFIG_MPSL_FEM_POWER_MODEL=y CONFIG_MPSL_FEM_POWER_MODEL_NRF21540_USE_BUILTIN=y CONFIG_BT_CTLR_TX_PWR_ANTENNA=20 # ─── Assert ────────────────────────────────────────────────────────────────── CONFIG_ASSERT=y # ─── Heap runtime stats (optional, useful for debugging) ───────────────────── CONFIG_SYS_HEAP_RUNTIME_STATS=y # ─────────── prj.conf ADDDED ON -> 9th MARCH for CRC CHECK ────────────────────── CONFIG_CRC=y # ─── Fatal Error Debugging 10th MARCH 2026, ─────────────────────────────────────────────────── CONFIG_RESET_ON_FATAL_ERROR=n # Prevent immediate reboot so output is visible CONFIG_THREAD_NAME=y # Show thread name (e.g. "main") instead of "unknown" CONFIG_ASSERT=y CONFIG_ASSERT_VERBOSE=y CONFIG_ASSERT_NO_COND_INFO=n CONFIG_ASSERT_NO_MSG_INFO=n # Stack overflow detection CONFIG_HW_STACK_PROTECTION=y CONFIG_INIT_STACKS=y # Immediate logging ensures crash logs are flushed before halt CONFIG_LOG_MODE_IMMEDIATE=y #──────────────────────────── THREAD ANALYZER FOR STACK OVERFLOW DETECTION ────────────────────── #CONFIG_THREAD_NAME=y #CONFIG_THREAD_ANALYZER=y #CONFIG_THREAD_ANALYZER_AUTO=y #CONFIG_THREAD_ANALYZER_RUN_UNLOCKED=y #CONFIG_THREAD_ANALYZER_USE_LOG=y #CONFIG_THREAD_ANALYZER_AUTO_INTERVAL=30 #CONFIG_THREAD_ANALYZER_AUTO_STACK_SIZE=2048 #CONFIG_INIT_STACKS=y AND here is scan/conn Implementaion: static void discovery_work_handler(struct k_work *work); static void scan_filter_match(struct bt_scan_device_info *device_info, struct bt_scan_filter_match *filter_match, bool connectable) { char addr[BT_ADDR_LE_STR_LEN]; bt_addr_le_to_str(device_info->recv_info->addr, addr, sizeof(addr)); LOG_INF("Filters matched. Address: %s connectable: %d RSSI: %d",addr, connectable, device_info->recv_info->rssi); //LOG_INF("Filters matched. "); } static void scan_connecting_error(struct bt_scan_device_info *device_info) { // LOG_WRN("Connecting failed"); } static void scan_connecting(struct bt_scan_device_info *device_info, struct bt_conn *conn) { default_conn = bt_conn_ref(conn); /* Print pointer value (for debugging) */ LOG_INF("default_conn pointer: %p in scan_connecting", (void *)default_conn); } BT_SCAN_CB_INIT(scan_cb, scan_filter_match, NULL, scan_connecting_error, scan_connecting); /* Explicit scan parameters: timeout = 0 => infinite scan */ static struct bt_le_scan_param scan_param = { .type = BT_LE_SCAN_TYPE_ACTIVE, .options = BT_LE_SCAN_OPT_NONE, .interval = BT_GAP_SCAN_FAST_INTERVAL, .window = BT_GAP_SCAN_FAST_WINDOW, .timeout = 0, /* infinite scanning */ }; static int scan_init(void) { int err; struct bt_scan_init_param scan_init = { .connect_if_match = 1, //1, // 4th FEB 2026 .scan_param = &scan_param, /* use our params */ .conn_param = NULL, /* BT_LE_CONN_PARAM_DEFAULT */ }; bt_scan_init(&scan_init); bt_scan_cb_register(&scan_cb); err = bt_scan_filter_add(BT_SCAN_FILTER_TYPE_UUID, BT_UUID_NUS_SERVICE); if (err) { //LOG_ERR("Scanning filters cannot be set (err %d)", err); return err; } err = bt_scan_filter_enable(BT_SCAN_UUID_FILTER, false); if (err) { //LOG_ERR("Filters cannot be turned on (err %d)", err); return err; } //LOG_INF("Scan module initialized"); return err; } /* Connection Callbacks */ BT_CONN_CB_DEFINE(conn_callbacks) = { .connected = on_connected, .disconnected = on_disconnected, .security_changed = on_security_changed }; static void discovery_work_handler(struct k_work *work) { if (discovery_conn) { int err = start_discovery(discovery_conn); if (err) { LOG_ERR("start_discovery from work failed (err %d)", err); } } } static uint8_t custom_uart_notify(struct bt_conn *conn, struct bt_gatt_subscribe_params *params, const void *data, uint16_t len) { char addr[BT_ADDR_LE_STR_LEN]; static uint8_t frame_checksum = 0; static uint32_t total_bytes_received = 0; if (conn) { bt_addr_le_to_str(bt_conn_get_dst(conn), addr, sizeof(addr)); } LOG_INF(" DATA LEN : %d",len); if (!data) { received_frames = 0; total_bytes_received = 0; frame_checksum = 0; return BT_GATT_ITER_CONTINUE; } if (len != FRAME_SIZE) { //LOG_ERR("Invalid frame size: %d (expected %d)", len, FRAME_SIZE); return BT_GATT_ITER_CONTINUE; } if (received_frames >= TOTAL_FRAMES) { //LOG_WRN("Received extra frame (already have %d frames)", received_frames); return BT_GATT_ITER_CONTINUE; } uint8_t current_checksum = 0; for (int i = 0; i < len; i++) { current_checksum += ((const uint8_t *)data)[i]; } memcpy(&full_data[received_frames * FRAME_SIZE], data, len); received_frames++; total_bytes_received += len; frame_checksum += current_checksum; if (received_frames == TOTAL_FRAMES) { uint16_t current_packet_counter = ((full_data[13] << 8) | full_data[14]); uint32_t print_epoch_from_tag = ((full_data[15] << 24) | (full_data[16] << 16) | (full_data[17] << 8) | full_data[18]); for(int i=1;i<10;i++) { current_device_name[i-1] = full_data[i]; } current_device_name[9] = '\0'; //LOG_INF("********************************* Device name : %s PACKET COUNTER : %d and epoch_from_tag : %d ***************************",current_device_name,current_packet_counter,print_epoch_from_tag); LOG_INF("Name: %s, PKT CNTR: %d, epoch: %d",current_device_name,current_packet_counter,print_epoch_from_tag); received_frames = 0; total_bytes_received = 0; frame_checksum = 0; data_non_empty_check = true; memset(&full_data,0,sizeof(full_data)); memset(¤t_device_name,0,sizeof(current_device_name)); current_packet_counter = 0; // 30th DEC 2025, Clear Variable for next cycle //21th JAN 2026, Added to terminate ble connection from scanner side, need to test contineously. if (epoch_wr_counter_check >= LOGS_PER_WRITE) { central_terminate_ble_conn_flag = true; } } return BT_GATT_ITER_CONTINUE; } static int bt_custom_subscribe_receive(struct bt_custom_client *custom) { static struct bt_gatt_subscribe_params subscribe_params; if (!custom || !custom->conn || !custom->value_handle || !custom->cccd_handle) { //LOG_ERR("Invalid custom client parameters"); return -EINVAL; } memset(&subscribe_params, 0, sizeof(subscribe_params)); subscribe_params.value_handle = custom->value_handle; subscribe_params.ccc_handle = custom->cccd_handle; subscribe_params.notify = custom_uart_notify; subscribe_params.value = BT_GATT_CCC_NOTIFY; int err = bt_gatt_subscribe(custom->conn, &subscribe_params); if (err) { LOG_ERR("Subscription failed: %d", err); return err; } LOG_INF("bt_gatt_subscribe err code: %d",err); return 0; } static uint8_t discover_func(struct bt_conn *conn, const struct bt_gatt_attr *attr, struct bt_gatt_discover_params *params) { int err; if (!attr) { //LOG_INF("Discovery complete in discover function"); // Assign discovered handles to your client structure my_custom_client.conn = conn; my_custom_client.value_handle = my_char_handle; // Set during characteristic discovery my_custom_client.cccd_handle = my_cccd_handle; // Set during descriptor discovery /*if (bt_custom_subscribe_receive(&my_custom_client)) { LOG_INF("Subscription to custom characteristic failed"); }*/ int sub_char_err = bt_custom_subscribe_receive(&my_custom_client); if (sub_char_err) { LOG_ERR("Subscription to custom characteristic failed (err: %d)", sub_char_err); } return BT_GATT_ITER_STOP; } if (params->type == BT_GATT_DISCOVER_PRIMARY) { struct bt_gatt_service_val *svc = (struct bt_gatt_service_val *)attr->user_data; LOG_INF("Found service, start_handle: 0x%04x, end_handle: 0x%04x", attr->handle, svc->end_handle); discover_params.uuid = NULL; // Discover all characteristics discover_params.start_handle = attr->handle + 1; discover_params.end_handle = svc->end_handle; discover_params.type = BT_GATT_DISCOVER_CHARACTERISTIC; discover_params.func = discover_func; err = bt_gatt_discover(conn, &discover_params); if (err) { LOG_INF("Characteristic discovery failed (err %d)", err); } return BT_GATT_ITER_STOP; } else if (params->type == BT_GATT_DISCOVER_CHARACTERISTIC) { struct bt_gatt_chrc *chrc = (struct bt_gatt_chrc *)attr->user_data; //LOG_INF("Characteristic UUID type: 0x%x", chrc->uuid->type); my_char_handle = chrc->value_handle; LOG_INF("Characteristic handle: 0x%04x", my_char_handle); // Start descriptor (CCCD) discovery for this characteristic discover_params.uuid = BT_UUID_GATT_CCC; discover_params.start_handle = my_char_handle + 1; discover_params.end_handle = params->end_handle; discover_params.type = BT_GATT_DISCOVER_DESCRIPTOR; discover_params.func = discover_func; err = bt_gatt_discover(conn, &discover_params); if (err) { LOG_INF("Descriptor discovery failed (err %d)", err); } return BT_GATT_ITER_STOP; } else if (params->type == BT_GATT_DISCOVER_DESCRIPTOR) { // Check if this is the CCCD if (bt_uuid_cmp(attr->uuid, BT_UUID_GATT_CCC) == 0) { my_cccd_handle = attr->handle; LOG_INF("CCCD handle: 0x%04x", my_cccd_handle); } // Continue to next attribute if needed } return BT_GATT_ITER_CONTINUE; } //static int start_discovery(struct bt_conn *conn) { int err; //LOG_INF("Starting discovery for custom UUID"); // Print the conn pointer address to confirm it is non-NULL LOG_INF("start_discovery: conn pointer = %p", (void *)conn); char uuid_str[37]; bt_uuid_to_str(&custom_uart_uuid.uuid, uuid_str, sizeof(uuid_str)); //LOG_INF("Custom UUID: %s", uuid_str); discover_params.uuid = &custom_uart_uuid.uuid; discover_params.func = discover_func; discover_params.start_handle = BT_ATT_FIRST_ATTRIBUTE_HANDLE; discover_params.end_handle = BT_ATT_LAST_ATTRIBUTE_HANDLE; discover_params.type = BT_GATT_DISCOVER_PRIMARY; err = bt_gatt_discover(conn, &discover_params); if (err) { LOG_ERR("Custom service discovery failed (err %d)", err); return err; } return 0; } static void exchange_func(struct bt_conn *conn, uint8_t err,struct bt_gatt_exchange_params *params) { if (!err) { uint16_t mtu = bt_gatt_get_mtu(conn); LOG_INF("Negotiated MTU size is: %d", mtu); } else { LOG_WRN("MTU exchange failed (err %" PRIu8 "), proceeding with default MTU", err); } // Defer discovery to system workqueue (outside BT RX thread) discovery_conn = conn; k_work_submit(&discovery_work); } void on_connected(struct bt_conn *conn, uint8_t err) { ble_evt_in_process_flag = true; // 8th JAN 2026, added to check ble event for scan timer timeout execution memset(&full_data,0,sizeof(full_data)); if (err) { LOG_INF("Conn fail err code: %d",err); if (default_conn == conn) { LOG_INF("default_conn pointer: %p in on_Connected", (void *)default_conn); bt_conn_unref(default_conn); default_conn = NULL; } ble_connection_error_flag = true; // 31st DEC 2025 return; } LOG_INF("-------------------- CONNECTED to BLE DEVICE ---------------------"); int scan_stop_err = bt_scan_stop(); if (scan_stop_err == -EALREADY) { LOG_INF(" ################# scan already stop (err %d)", scan_stop_err); } static struct bt_gatt_exchange_params exchange_params; exchange_params.func = exchange_func; err = bt_gatt_exchange_mtu(conn, &exchange_params); LOG_INF("MTU exchange request (err %d)", err); } static void on_disconnected(struct bt_conn *conn, uint8_t reason) { LOG_INF(" -------------------- Disconnected... (reason 0x%02x) -------------------------", reason); // Reset state and clean up received_frames = 0; my_char_handle = 0; my_cccd_handle = 0; if (default_conn == conn) { bt_conn_unref(default_conn); default_conn = NULL; } ble_data_ready_flag = true; } Expected Execution Sequence: Scanner starts scanning for nearby devices Filters device based on matching service UUID Initiates connection upon match On successful connection: MTU exchange request is initiated On MTU exchange callback → start service discovery On discovery completion → subscribe to characteristic Connected tag sends data log Data Transfer Details: Total log size: 1040 bytes Sent in 26 frames Each frame: 40 bytes Issue Observed: Occasionally, the full data log is received successfully However, most of the time, device disconnecting as: MTU exchange fails , Error 0x3E (Connection Failed to be Established / Timeout) MTU exchnage and sunscription succ, Error 0x13 (Remote User Terminated Connection) RTT logs (showing both successful and failing cases) Fullscreen SCANNER_LOG.txt Download 00> *** Booting nRF Connect SDK v2.9.1-60d0d6c8d42d *** 00> *** Using Zephyr OS v3.7.99-ca954a6216c9 *** 00> [00:00:00.002,471] combined_ble: 00> 00> 00> 00> [00:00:00.011,352] combined_ble: Bluetooth initialized initially... 00> [00:00:00.011,779] combined_ble: UART_RX_BUF_REQUEST 00> [00:00:00.012,115] combined_ble: uart_init returns err code : 0 00> [00:00:00.014,160] combined_ble: Scan Resume err code : 0 00> [00:00:23.358,306] combined_ble: Filters matched. Address: E5:F7:69:AF:E8:21 (random) connectable: 0 RSSI: -66 00> [00:00:23.362,304] combined_ble: default_conn pointer: 0x20002d18 in scan_connecting 00> [00:00:23.381,774] combined_ble: -------------------- CONNECTED to BLE DEVICE --------------------- 00> [00:00:23.383,087] combined_ble: MTU exchange request (err 0) 00> [00:00:23.583,343] combined_ble: Negotiated MTU size is: 247 00> [00:00:23.683,319] combined_ble: Found service, start_handle: 0x0010, end_handle: 0x0015 00> [00:00:23.783,721] combined_ble: Characteristic handle: 0x0012 00> [00:00:23.883,300] combined_ble: CCCD handle: 0x0013 00> [00:00:23.883,758] combined_ble: bt_gatt_subscribe err code: 0 00> [00:00:24.233,581] combined_ble: DATA LEN : 40 00> [00:00:24.234,466] combined_ble: DATA LEN : 40 00> [00:00:24.283,630] combined_ble: DATA LEN : 40 00> [00:00:24.333,618] combined_ble: DATA LEN : 40 00> [00:00:24.383,605] combined_ble: DATA LEN : 40 00> [00:00:24.433,624] combined_ble: DATA LEN : 40 00> [00:00:24.483,612] combined_ble: DATA LEN : 40 00> [00:00:24.533,630] combined_ble: DATA LEN : 40 00> [00:00:24.583,618] combined_ble: DATA LEN : 40 00> [00:00:24.633,605] combined_ble: DATA LEN : 40 00> [00:00:24.683,624] combined_ble: DATA LEN : 40 00> [00:00:24.733,612] combined_ble: DATA LEN : 40 00> [00:00:24.883,605] combined_ble: DATA LEN : 40 00> [00:00:24.933,624] combined_ble: DATA LEN : 40 00> [00:00:24.983,612] combined_ble: DATA LEN : 40 00> [00:00:25.033,630] combined_ble: DATA LEN : 40 00> [00:00:25.083,618] combined_ble: DATA LEN : 40 00> [00:00:25.133,605] combined_ble: DATA LEN : 40 00> [00:00:25.183,624] combined_ble: DATA LEN : 40 00> [00:00:25.283,630] combined_ble: DATA LEN : 40 00> [00:00:25.333,618] combined_ble: DATA LEN : 40 00> [00:00:25.383,605] combined_ble: DATA LEN : 40 00> [00:00:25.433,624] combined_ble: DATA LEN : 40 00> [00:00:25.483,612] combined_ble: DATA LEN : 40 00> [00:00:25.533,630] combined_ble: DATA LEN : 40 00> [00:00:25.583,618] combined_ble: DATA LEN : 40 00> [00:00:25.583,984] combined_ble: Name: S1IAD1902, PKT CNTR: 9105, epoch: 1774530000 00> [00:00:27.633,148] combined_ble: DATA LEN : 0 00> [00:00:27.633,514] combined_ble: -------------------- Disconnected... (reason 0x13) ------------------------- 00> [00:00:00.014,312] combined_ble: Scan Resume err code : 0 00> [00:00:07.774,078] combined_ble: Filters matched. Address: E4:36:13:61:FA:F1 (random) connectable: 0 RSSI: -75 00> [00:00:07.777,496] combined_ble: default_conn pointer: 0x20002d18 in scan_connecting 00> [00:00:07.805,419] combined_ble: -------------------- CONNECTED to BLE DEVICE --------------------- 00> [00:00:07.806,732] combined_ble: MTU exchange request (err 0) 00> [00:00:08.056,976] combined_ble: Negotiated MTU size is: 247 00> [00:00:08.057,342] combined_ble: start_discovery: conn pointer = 0x20002d18 00> [00:00:08.156,951] combined_ble: Found service, start_handle: 0x0010, end_handle: 0x0015 00> [00:00:08.357,299] combined_ble: Characteristic handle: 0x0012 00> [00:00:08.506,958] combined_ble: CCCD handle: 0x0013 00> [00:00:08.507,385] combined_ble: bt_gatt_subscribe err code: 0 00> [00:00:08.657,226] combined_ble: DATA LEN : 40 00> [00:00:08.658,111] combined_ble: DATA LEN : 40 00> [00:00:08.707,275] combined_ble: DATA LEN : 40 00> [00:00:08.757,263] combined_ble: DATA LEN : 40 00> [00:00:08.807,281] combined_ble: DATA LEN : 40 00> [00:00:08.857,269] combined_ble: DATA LEN : 40 00> [00:00:08.907,287] combined_ble: DATA LEN : 40 00> [00:00:08.957,275] combined_ble: DATA LEN : 40 00> [00:00:09.007,263] combined_ble: DATA LEN : 40 00> [00:00:09.057,281] combined_ble: DATA LEN : 40 00> [00:00:09.107,269] combined_ble: DATA LEN : 40 00> [00:00:09.157,257] combined_ble: DATA LEN : 40 00> [00:00:09.207,275] combined_ble: DATA LEN : 40 00> [00:00:09.257,263] combined_ble: DATA LEN : 40 00> [00:00:09.307,281] combined_ble: DATA LEN : 40 00> [00:00:09.357,269] combined_ble: DATA LEN : 40 00> [00:00:09.407,287] combined_ble: DATA LEN : 40 00> [00:00:09.457,275] combined_ble: DATA LEN : 40 00> [00:00:09.507,263] combined_ble: DATA LEN : 40 00> [00:00:09.557,281] combined_ble: DATA LEN : 40 00> [00:00:09.607,269] combined_ble: DATA LEN : 40 00> [00:00:09.657,257] combined_ble: DATA LEN : 40 00> [00:00:09.757,263] combined_ble: DATA LEN : 40 00> [00:00:09.807,281] combined_ble: DATA LEN : 40 00> [00:00:09.857,269] combined_ble: DATA LEN : 40 00> [00:00:09.907,257] combined_ble: DATA LEN : 40 00> [00:00:09.907,623] combined_ble: Name: S1IAD1640, PKT CNTR: 1454, epoch: 1774530000 00> [00:00:11.956,787] combined_ble: DATA LEN : 0 00> [00:00:11.957,153] combined_ble: -------------------- Disconnected... (reason 0x13) ------------------------- 00> [00:00:12.028,747] combined_ble: Scan Resume err code : 0 00> [00:00:12.029,113] combined_ble: 00> 00> 00> 00> 00> [00:01:32.874,420] combined_ble: Filters matched. Address: E5:F7:69:AF:E8:21 (random) connectable: 0 RSSI: -66 00> [00:01:32.876,892] combined_ble: default_conn pointer: 0x20002d18 in scan_connecting 00> [00:01:32.897,308] combined_ble: -------------------- CONNECTED to BLE DEVICE --------------------- 00> [00:01:32.898,590] combined_ble: MTU exchange request (err 0) 00> [00:01:33.148,895] combined_ble: MTU exchange failed (err 14) 00> [00:01:33.149,291] combined_ble: start_discovery: conn pointer = 0x20002d18 00> [00:01:33.149,749] combined_ble: Custom service discovery failed (err -128) 00> [00:01:33.150,268] combined_ble: -------------------- Disconnected... (reason 0x3e) ------------------------- 00> [00:01:33.212,829] combined_ble: Scan Resume err code : 0 00> [00:01:33.213,195] combined_ble: 00> 00> 00> 00> 00> [00:01:38.499,298] combined_ble: Filters matched. Address: DC:BF:AF:86:1F:0E (random) connectable: 0 RSSI: -70 00> [00:01:38.505,981] combined_ble: default_conn pointer: 0x20002d18 in scan_connecting 00> [00:01:41.507,904] combined_ble: Conn fail err code: 2 00> [00:01:41.508,270] combined_ble: default_conn pointer: 0x20002d18 in on_Connected 00> [00:01:41.523,010] combined_ble: Scan Resumed err code : 0 00> [00:01:42.030,883] combined_ble: Filters matched. Address: D4:D7:B8:24:41:E6 (random) connectable: 0 RSSI: -68 00> [00:01:42.035,430] combined_ble: default_conn pointer: 0x20002d18 in scan_connecting 00> [00:01:42.055,511] combined_ble: -------------------- CONNECTED to BLE DEVICE --------------------- 00> [00:01:42.056,823] combined_ble: MTU exchange request (err 0) 00> [00:01:42.307,098] combined_ble: MTU exchange failed (err 14) 00> [00:01:42.307,495] combined_ble: start_discovery: conn pointer = 0x20002d18 00> [00:01:42.307,983] combined_ble: Custom service discovery failed (err -128) 00> [00:01:42.308,502] combined_ble: -------------------- Disconnected... (reason 0x3e) ------------------------- 00> [00:01:42.326,446] combined_ble: Scan Resume err code : 0 00> [00:01:42.326,812] combined_ble: 00> 00> 00> 00> 00> [00:01:42.346,130] combined_ble: Filters matched. Address: D4:D7:B8:24:41:E6 (random) connectable: 0 RSSI: -71 00> [00:01:42.349,578] combined_ble: default_conn pointer: 0x20002d18 in scan_connecting 00> [00:01:42.373,321] combined_ble: -------------------- CONNECTED to BLE DEVICE --------------------- 00> [00:01:42.374,633] combined_ble: MTU exchange request (err 0) 00> [00:01:42.774,810] combined_ble: Negotiated MTU size is: 247 00> [00:01:42.775,207] combined_ble: start_discovery: conn pointer = 0x20002d18 00> [00:01:42.874,938] combined_ble: Found service, start_handle: 0x0010, end_handle: 0x0015 00> [00:01:42.975,128] combined_ble: Characteristic handle: 0x0012 00> [00:01:43.124,847] combined_ble: CCCD handle: 0x0013 00> [00:01:43.125,274] combined_ble: bt_gatt_subscribe err code: 0 00> [00:01:43.274,658] combined_ble: DATA LEN : 0 00> [00:01:43.275,054] combined_ble: -------------------- Disconnected... (reason 0x13) ------------------------- 00> [00:01:43.330,352] combined_ble: Scan Resume err code : 0 00> [00:01:43.330,718] combined_ble: 00> 00> 00> 00> 00> [00:02:11.426,574] combined_ble: Filters matched. Address: D4:72:A9:51:FD:79 (random) connectable: 0 RSSI: -73 00> [00:02:11.428,527] combined_ble: default_conn pointer: 0x20002d18 in scan_connecting 00> [00:02:11.457,458] combined_ble: -------------------- CONNECTED to BLE DEVICE --------------------- 00> [00:02:11.458,770] combined_ble: MTU exchange request (err 0) 00> [00:02:11.709,045] combined_ble: MTU exchange failed (err 14) 00> [00:02:11.709,442] combined_ble: start_discovery: conn pointer = 0x20002d18 00> [00:02:11.709,930] combined_ble: Custom service discovery failed (err -128) 00> [00:02:11.710,449] combined_ble: -------------------- Disconnected... (reason 0x3e) ------------------------- 00> [00:02:11.762,542] combined_ble: Scan Resume err code : 0 00> [00:02:11.762,908] combined_ble: 00> 00> 00> 00> 00> [00:02:11.827,209] combined_ble: Filters matched. Address: D4:72:A9:51:FD:79 (random) connectable: 0 RSSI: -75 00> [00:02:11.830,688] combined_ble: default_conn pointer: 0x20002d18 in scan_connecting 00> [00:02:11.857,421] combined_ble: -------------------- CONNECTED to BLE DEVICE --------------------- 00> [00:02:11.858,734] combined_ble: MTU exchange request (err 0) 00> [00:02:12.109,008] combined_ble: MTU exchange failed (err 14) 00> [00:02:12.109,405] combined_ble: start_discovery: conn pointer = 0x20002d18 00> [00:02:12.109,893] combined_ble: Custom service discovery failed (err -128) 00> [00:02:12.110,412] combined_ble: -------------------- Disconnected... (reason 0x3e) ------------------------- 00> [00:02:12.165,863] combined_ble: Scan Resume err code : 0 00> [00:02:12.166,229] combined_ble: 00> 00> 00> 00> 00> [00:02:21.975,708] combined_ble: Filters matched. Address: C7:5C:04:2A:9E:85 (random) connectable: 0 RSSI: -67 00> [00:02:21.978,240] combined_ble: default_conn pointer: 0x20002d18 in scan_connecting 00> [00:02:24.980,163] combined_ble: Conn fail err code: 2 00> [00:02:24.980,529] combined_ble: default_conn pointer: 0x20002d18 in on_Connected 00> [00:02:24.982,971] combined_ble: Scan Resumed err code : 0 00> [00:03:02.798,858] combined_ble: Filters matched. Address: E4:36:13:61:FA:F1 (random) connectable: 0 RSSI: -73 00> [00:03:02.801,147] combined_ble: default_conn pointer: 0x20002d18 in scan_connecting 00> [00:03:02.824,401] combined_ble: -------------------- CONNECTED to BLE DEVICE --------------------- 00> [00:03:02.825,714] combined_ble: MTU exchange request (err 0) 00> [00:03:03.075,988] combined_ble: MTU exchange failed (err 14) 00> [00:03:03.076,385] combined_ble: start_discovery: conn pointer = 0x20002d18 00> [00:03:03.076,873] combined_ble: Custom service discovery failed (err -128) 00> [00:03:03.077,392] combined_ble: -------------------- Disconnected... (reason 0x3e) ------------------------- 00> [00:03:03.123,596] combined_ble: Scan Resume err code : 0 00> [00:03:03.123,962] combined_ble: 00> 00> 00> 00> 00> [00:03:05.355,743] combined_ble: Filters matched. Address: CC:0D:F5:68:F7:4D (random) connectable: 0 RSSI: -64 00> [00:03:05.361,755] combined_ble: default_conn pointer: 0x20002d18 in scan_connecting 00> [00:03:05.378,845] combined_ble: -------------------- CONNECTED to BLE DEVICE --------------------- 00> [00:03:05.380,157] combined_ble: MTU exchange request (err 0) 00> [00:03:05.630,462] combined_ble: MTU exchange failed (err 14) 00> [00:03:05.630,828] combined_ble: start_discovery: conn pointer = 0x20002d18 00> [00:03:05.631,317] combined_ble: Custom service discovery failed (err -128) 00> [00:03:05.631,835] combined_ble: -------------------- Disconnected... (reason 0x3e) ------------------------- 00> [00:03:05.729,095] combined_ble: Scan Resume err code : 0 00> [00:03:05.729,461] combined_ble: 00> 00> 00> 00> 00> [00:03:05.750,457] combined_ble: Filters matched. Address: CC:0D:F5:68:F7:4D (random) connectable: 0 RSSI: -73 00> [00:03:05.752,227] combined_ble: default_conn pointer: 0x20002d18 in scan_connecting 00> [00:03:05.773,315] combined_ble: -------------------- CONNECTED to BLE DEVICE --------------------- 00> [00:03:05.774,627] combined_ble: MTU exchange request (err 0) 00> [00:03:06.024,871] combined_ble: Negotiated MTU size is: 247 00> [00:03:06.025,238] combined_ble: start_discovery: conn pointer = 0x20002d18 00> [00:03:06.174,835] combined_ble: Found service, start_handle: 0x0010, end_handle: 0x0015 00> [00:03:06.275,238] combined_ble: Characteristic handle: 0x0012 00> [00:03:06.374,847] combined_ble: CCCD handle: 0x0013 00> [00:03:06.375,274] combined_ble: bt_gatt_subscribe err code: 0 00> [00:03:06.625,122] combined_ble: DATA LEN : 40 00> [00:03:06.625,976] combined_ble: DATA LEN : 40 00> [00:03:06.675,140] combined_ble: DATA LEN : 40 00> [00:03:06.725,158] combined_ble: DATA LEN : 40 00> [00:03:06.775,146] combined_ble: DATA LEN : 40 00> [00:03:06.825,164] combined_ble: DATA LEN : 40 00> [00:03:06.875,152] combined_ble: DATA LEN : 40 00> [00:03:06.925,140] combined_ble: DATA LEN : 40 00> [00:03:06.975,158] combined_ble: DATA LEN : 40 00> [00:03:07.025,146] combined_ble: DATA LEN : 40 00> [00:03:07.075,164] combined_ble: DATA LEN : 40 00> [00:03:07.125,152] combined_ble: DATA LEN : 40 00> [00:03:07.175,140] combined_ble: DATA LEN : 40 00> [00:03:07.225,158] combined_ble: DATA LEN : 40 00> [00:03:07.275,146] combined_ble: DATA LEN : 40 00> [00:03:07.325,164] combined_ble: DATA LEN : 40 00> [00:03:07.375,152] combined_ble: DATA LEN : 40 00> [00:03:07.425,140] combined_ble: DATA LEN : 40 00> [00:03:07.475,158] combined_ble: DATA LEN : 40 00> [00:03:07.525,146] combined_ble: DATA LEN : 40 00> [00:03:07.575,164] combined_ble: DATA LEN : 40 00> [00:03:07.625,152] combined_ble: DATA LEN : 40 00> [00:03:07.675,140] combined_ble: DATA LEN : 40 00> [00:03:07.725,158] combined_ble: DATA LEN : 40 00> [00:03:07.775,146] combined_ble: DATA LEN : 40 00> [00:03:07.825,164] combined_ble: DATA LEN : 40 00> [00:03:07.825,500] combined_ble: Name: S1IAD1885, PKT CNTR: 7646, epoch: 1774529400 00> [00:03:09.874,664] combined_ble: DATA LEN : 0 00> [00:03:09.875,030] combined_ble: -------------------- Disconnected... (reason 0x13) ------------------------- 00> [00:03:09.936,126] combined_ble: Scan Resume err code : 0 00> [00:03:09.936,492] combined_ble: 00> 00> 00> 00> 00> [00:04:27.888,671] combined_ble: Filters matched. Address: E5:F7:69:AF:E8:21 (random) connectable: 0 RSSI: -68 00> [00:04:27.894,287] combined_ble: default_conn pointer: 0x20002d18 in scan_connecting 00> [00:04:27.915,344] combined_ble: -------------------- CONNECTED to BLE DEVICE --------------------- 00> [00:04:27.916,687] combined_ble: MTU exchange request (err 0) 00> [00:04:28.116,912] combined_ble: Negotiated MTU size is: 247 00> [00:04:28.117,279] combined_ble: start_discovery: conn pointer = 0x20002d18 00> [00:04:28.216,888] combined_ble: Found service, start_handle: 0x0010, end_handle: 0x0015 00> [00:04:28.317,291] combined_ble: Characteristic handle: 0x0012 00> [00:04:28.416,900] combined_ble: CCCD handle: 0x0013 00> [00:04:28.417,327] combined_ble: bt_gatt_subscribe err code: 0 00> [00:04:28.767,181] combined_ble: DATA LEN : 40 00> [00:04:28.768,035] combined_ble: DATA LEN : 40 00> [00:04:28.817,199] combined_ble: DATA LEN : 40 00> [00:04:28.867,187] combined_ble: DATA LEN : 40 00> [00:04:28.967,193] combined_ble: DATA LEN : 40 00> [00:04:29.017,211] combined_ble: DATA LEN : 40 00> [00:04:29.067,199] combined_ble: DATA LEN : 40 00> [00:04:29.117,187] combined_ble: DATA LEN : 40 00> [00:04:29.167,205] combined_ble: DATA LEN : 40 00> [00:04:29.217,193] combined_ble: DATA LEN : 40 00> [00:04:29.317,199] combined_ble: DATA LEN : 40 00> [00:04:29.367,187] combined_ble: DATA LEN : 40 00> [00:04:29.417,205] combined_ble: DATA LEN : 40 00> [00:04:29.467,193] combined_ble: DATA LEN : 40 00> [00:04:29.517,211] combined_ble: DATA LEN : 40 00> [00:04:29.567,199] combined_ble: DATA LEN : 40 00> [00:04:29.617,218] combined_ble: DATA LEN : 40 00> [00:04:29.667,205] combined_ble: DATA LEN : 40 00> [00:04:29.717,193] combined_ble: DATA LEN : 40 00> [00:04:29.767,211] combined_ble: DATA LEN : 40 00> [00:04:29.817,199] combined_ble: DATA LEN : 40 00> [00:04:29.867,187] combined_ble: DATA LEN : 40 00> [00:04:29.917,205] combined_ble: DATA LEN : 40 00> [00:04:30.017,211] combined_ble: DATA LEN : 40 00> [00:04:30.067,199] combined_ble: DATA LEN : 40 00> [00:04:30.117,187] combined_ble: DATA LEN : 40 00> [00:04:30.117,553] combined_ble: Name: S1IAD1902, PKT CNTR: 9105, epoch: 1774530000 00> [00:04:32.166,717] combined_ble: DATA LEN : 0 00> [00:04:32.167,083] combined_ble: -------------------- Disconnected... (reason 0x13) ------------------------- 00> [00:04:32.220,703] combined_ble: Scan Resume err code : 0 00> [00:04:32.221,069] combined_ble: 00> 00> 00> 00> 00> [00:04:37.027,069] combined_ble: Filters matched. Address: D4:D7:B8:24:41:E6 (random) connectable: 0 RSSI: -71 00> [00:04:37.028,869] combined_ble: default_conn pointer: 0x20002d18 in scan_connecting 00> [00:04:37.045,806] combined_ble: -------------------- CONNECTED to BLE DEVICE --------------------- 00> [00:04:37.047,119] combined_ble: MTU exchange request (err 0) 00> [00:04:37.397,308] combined_ble: Negotiated MTU size is: 247 00> [00:04:37.397,705] combined_ble: start_discovery: conn pointer = 0x20002d18 00> [00:04:37.497,436] combined_ble: Found service, start_handle: 0x0010, end_handle: 0x0015 00> [00:04:37.597,625] combined_ble: Characteristic handle: 0x0012 00> [00:04:37.697,357] combined_ble: CCCD handle: 0x0013 00> [00:04:37.697,784] combined_ble: bt_gatt_subscribe err code: 0 00> [00:04:37.897,613] combined_ble: DATA LEN : 40 00> [00:04:37.898,498] combined_ble: DATA LEN : 40 00> [00:04:37.947,662] combined_ble: DATA LEN : 40 00> [00:04:37.997,650] combined_ble: DATA LEN : 40 00> [00:04:38.047,668] combined_ble: DATA LEN : 40 00> [00:04:38.097,656] combined_ble: DATA LEN : 40 00> [00:04:38.147,674] combined_ble: DATA LEN : 40 00> [00:04:38.197,662] combined_ble: DATA LEN : 40 00> [00:04:38.247,650] combined_ble: DATA LEN : 40 00> [00:04:38.297,668] combined_ble: DATA LEN : 40 00> [00:04:38.347,656] combined_ble: DATA LEN : 40 00> [00:04:38.397,644] combined_ble: DATA LEN : 40 00> [00:04:38.447,662] combined_ble: DATA LEN : 40 00> [00:04:38.497,650] combined_ble: DATA LEN : 40 00> [00:04:38.547,668] combined_ble: DATA LEN : 40 00> [00:04:38.597,656] combined_ble: DATA LEN : 40 00> [00:04:38.647,674] combined_ble: DATA LEN : 40 00> [00:04:38.697,662] combined_ble: DATA LEN : 40 00> [00:04:38.747,650] combined_ble: DATA LEN : 40 00> [00:04:38.847,656] combined_ble: DATA LEN : 40 00> [00:04:38.897,674] combined_ble: DATA LEN : 40 00> [00:04:38.947,662] combined_ble: DATA LEN : 40 00> [00:04:38.997,650] combined_ble: DATA LEN : 40 00> [00:04:39.047,668] combined_ble: DATA LEN : 40 00> [00:04:39.097,656] combined_ble: DATA LEN : 40 00> [00:04:39.147,644] combined_ble: DATA LEN : 40 00> [00:04:39.148,010] combined_ble: Name: S1IAD1588, PKT CNTR: 1454, epoch: 1774530000 00> [00:04:41.197,174] combined_ble: DATA LEN : 0 00> [00:04:41.197,540] combined_ble: -------------------- Disconnected... (reason 0x13) ------------------------- 00> [00:04:41.232,727] combined_ble: Scan Resume err code : 0 00> [00:04:41.233,093] combined_ble: 00> 00> 00> 00> 00> [00:05:06.514,251] combined_ble: Filters matched. Address: D4:72:A9:51:FD:79 (random) connectable: 0 RSSI: -90 00> [00:05:06.520,874] combined_ble: default_conn pointer: 0x20002d18 in scan_connecting 00> [00:05:06.533,538] combined_ble: -------------------- CONNECTED to BLE DEVICE --------------------- 00> [00:05:06.534,851] combined_ble: MTU exchange request (err 0) 00> [00:05:06.785,125] combined_ble: MTU exchange failed (err 14) 00> [00:05:06.785,522] combined_ble: start_discovery: conn pointer = 0x20002d18 00> [00:05:06.786,010] combined_ble: Custom service discovery failed (err -128) 00> [00:05:06.786,529] combined_ble: -------------------- Disconnected... (reason 0x3e) ------------------------- 00> [00:05:06.861,541] combined_ble: Scan Resume err code : 0 00> [00:05:06.861,907] combined_ble: 00> 00> 00> 00> 00> [00:06:32.020,843] combined_ble: Filters matched. Address: C7:5C:04:2A:9E:85 (random) connectable: 0 RSSI: -71 00> [00:06:32.024,719] combined_ble: default_conn pointer: 0x20002d18 in scan_connecting 00> [00:06:32.048,004] combined_ble: -------------------- CONNECTED to BLE DEVICE --------------------- 00> [00:06:32.049,316] combined_ble: MTU exchange request (err 0) 00> [00:06:32.299,591] combined_ble: MTU exchange failed (err 14) 00> [00:06:32.299,987] combined_ble: start_discovery: conn pointer = 0x20002d18 00> [00:06:32.300,476] combined_ble: Custom service discovery failed (err -128) 00> [00:06:32.300,994] combined_ble: -------------------- Disconnected... (reason 0x3e) ------------------------- 00> [00:06:32.349,822] combined_ble: Scan Resume err code : 0 00> [00:06:32.350,189] combined_ble: 00> 00> 00> 00> 00> [00:06:32.359,039] combined_ble: Filters matched. Address: C7:5C:04:2A:9E:85 (random) connectable: 0 RSSI: -70 00> [00:06:32.361,907] combined_ble: default_conn pointer: 0x20002d18 in scan_connecting 00> [00:06:32.384,704] combined_ble: -------------------- CONNECTED to BLE DEVICE --------------------- 00> [00:06:32.385,986] combined_ble: MTU exchange request (err 0) 00> [00:06:32.636,291] combined_ble: MTU exchange failed (err 14) 00> [00:06:32.636,657] combined_ble: start_discovery: conn pointer = 0x20002d18 00> [00:06:32.637,145] combined_ble: Custom service discovery failed (err -128) 00> [00:06:32.637,664] combined_ble: -------------------- Disconnected... (reason 0x3e) ------------------------- 00> [00:06:32.653,045] combined_ble: Scan Resume err code : 0 00> [00:06:32.653,411] combined_ble: 00> 00> 00> 00> 00> [00:06:32.670,288] combined_ble: Filters matched. Address: C7:5C:04:2A:9E:85 (random) connectable: 0 RSSI: -68 00> [00:06:32.676,208] combined_ble: default_conn pointer: 0x20002d18 in scan_connecting 00> [00:06:32.690,795] combined_ble: -------------------- CONNECTED to BLE DEVICE --------------------- 00> [00:06:32.692,108] combined_ble: MTU exchange request (err 0) 00> [00:06:32.992,309] combined_ble: Negotiated MTU size is: 247 00> [00:06:32.992,675] combined_ble: start_discovery: conn pointer = 0x20002d18 00> [00:06:33.092,437] combined_ble: Found service, start_handle: 0x0010, end_handle: 0x0015 00> [00:06:33.192,626] combined_ble: Characteristic handle: 0x0012 00> [00:06:33.292,327] combined_ble: CCCD handle: 0x0013 00> [00:06:33.292,755] combined_ble: bt_gatt_subscribe err code: 0 00> [00:06:33.542,602] combined_ble: DATA LEN : 40 00> [00:06:33.543,487] combined_ble: DATA LEN : 40 00> [00:06:33.592,651] combined_ble: DATA LEN : 40 00> [00:06:33.642,639] combined_ble: DATA LEN : 40 00> [00:06:33.742,645] combined_ble: DATA LEN : 40 00> [00:06:33.792,633] combined_ble: DATA LEN : 40 00> [00:06:33.842,651] combined_ble: DATA LEN : 40 00> [00:06:33.892,639] combined_ble: DATA LEN : 40 00> [00:06:33.942,626] combined_ble: DATA LEN : 40 00> [00:06:33.992,645] combined_ble: DATA LEN : 40 00> [00:06:34.092,651] combined_ble: DATA LEN : 40 00> [00:06:34.142,639] combined_ble: DATA LEN : 40 00> [00:06:34.192,626] combined_ble: DATA LEN : 40 00> [00:06:34.242,645] combined_ble: DATA LEN : 40 00> [00:06:34.292,633] combined_ble: DATA LEN : 40 00> [00:06:34.342,651] combined_ble: DATA LEN : 40 00> [00:06:34.392,639] combined_ble: DATA LEN : 40 00> [00:06:34.442,626] combined_ble: DATA LEN : 40 00> [00:06:34.492,645] combined_ble: DATA LEN : 40 00> [00:06:34.542,633] combined_ble: DATA LEN : 40 00> [00:06:34.592,651] combined_ble: DATA LEN : 40 00> [00:06:34.642,639] combined_ble: DATA LEN : 40 00> [00:06:34.842,651] combined_ble: DATA LEN : 40 00> [00:06:34.892,639] combined_ble: DATA LEN : 40 00> [00:06:34.942,626] combined_ble: DATA LEN : 40 00> [00:06:34.992,645] combined_ble: DATA LEN : 40 00> [00:06:34.993,011] combined_ble: Name: S1IAD1876, PKT CNTR: 9101, epoch: 1774530000 00> [00:06:37.042,175] combined_ble: DATA LEN : 0 00> [00:06:37.042,541] combined_ble: -------------------- Disconnected... (reason 0x13) ------------------------- 00> [00:06:37.060,272] combined_ble: Scan Resume err code : 0 00> [00:06:37.060,638] combined_ble: 00> 00> 00> 00> 00> [00:07:12.610,198] combined_ble: Filters matched. Address: E4:36:13:61:FA:F1 (random) connectable: 0 RSSI: -76 00> [00:07:12.612,670] combined_ble: default_conn pointer: 0x20002d18 in scan_connecting 00> [00:07:12.628,509] combined_ble: -------------------- CONNECTED to BLE DEVICE --------------------- 00> [00:07:12.629,821] combined_ble: MTU exchange request (err 0) 00> [00:07:12.880,096] combined_ble: MTU exchange failed (err 14) 00> [00:07:12.880,493] combined_ble: start_discovery: conn pointer = 0x20002d18 00> [00:07:12.880,981] combined_ble: Custom service discovery failed (err -128) 00> [00:07:12.881,500] combined_ble: -------------------- Disconnected... (reason 0x3e) ------------------------- 00> [00:07:12.898,803] combined_ble: Scan Resume err code : 0 00> [00:07:12.899,169] combined_ble: 00> 00> 00> 00> 00> [00:08:37.878,631] combined_ble: Filters matched. Address: E5:F7:69:AF:E8:21 (random) connectable: 0 RSSI: -77 00> [00:08:37.881,988] combined_ble: default_conn pointer: 0x20002d18 in scan_connecting 00> [00:08:37.907,287] combined_ble: -------------------- CONNECTED to BLE DEVICE --------------------- 00> [00:08:37.908,630] combined_ble: MTU exchange request (err 0) 00> [00:08:38.108,856] combined_ble: Negotiated MTU size is: 247 00> [00:08:38.109,222] combined_ble: start_discovery: conn pointer = 0x20002d18 00> [00:08:38.258,850] combined_ble: Found service, start_handle: 0x0010, end_handle: 0x0015 00> [00:08:38.359,252] combined_ble: Characteristic handle: 0x0012 00> [00:08:38.458,831] combined_ble: CCCD handle: 0x0013 00> [00:08:38.459,289] combined_ble: bt_gatt_subscribe err code: 0 00> [00:08:38.759,124] combined_ble: DATA LEN : 40 00> [00:08:38.759,979] combined_ble: DATA LEN : 40 00> [00:08:38.809,143] combined_ble: DATA LEN : 40 00> [00:08:38.859,161] combined_ble: DATA LEN : 40 00> [00:08:38.909,149] combined_ble: DATA LEN : 40 00> [00:08:38.959,136] combined_ble: DATA LEN : 40 00> [00:08:39.009,155] combined_ble: DATA LEN : 40 00> [00:08:39.059,143] combined_ble: DATA LEN : 40 00> [00:08:39.109,161] combined_ble: DATA LEN : 40 00> [00:08:39.209,136] combined_ble: DATA LEN : 40 00> [00:08:39.309,143] combined_ble: DATA LEN : 40 00> [00:08:39.359,161] combined_ble: DATA LEN : 40 00> [00:08:39.409,149] combined_ble: DATA LEN : 40 00> [00:08:39.509,155] combined_ble: DATA LEN : 40 00> [00:08:39.609,161] combined_ble: DATA LEN : 40 00> [00:08:39.659,149] combined_ble: DATA LEN : 40 00> [00:08:39.709,136] combined_ble: DATA LEN : 40 00> [00:08:39.759,155]