Nrf52832 stopped advertising after disconnect

RE: Nrf52832 stopped advertising after disconnect

haakonsh — Fri, 25 Jan 2019 13:26:57 GMT

Your parameters seem fine to me.

"I found sometimes device is not showing after disconnect"
The sniffer log you provided shows a single connection, and advertisements immediately following a disconnect.

See packet nr. 1024-1026.

We need a sniffer trace that contains the symptoms you've described.

RE: Nrf52832 stopped advertising after disconnect

gokul — Wed, 23 Jan 2019 11:26:13 GMT

check that init parameters are valid under nrf52 sdk 15.02 !

RE: Nrf52832 stopped advertising after disconnect

haakonsh — Wed, 23 Jan 2019 10:13:40 GMT

I can't see where in the sniffer trace where the device with address CA43E77D23DF stops using it's address.

RE: Nrf52832 stopped advertising after disconnect

gokul — Wed, 23 Jan 2019 02:42:04 GMT

Check my config for any bug !

RE: Nrf52832 stopped advertising after disconnect

gokul — Wed, 23 Jan 2019 02:41:25 GMT

Bluetooth 5 device nrf52832 will behave different with redmi note 4 (BLE 4.10) or what?

RE: Nrf52832 stopped advertising after disconnect

gokul — Wed, 23 Jan 2019 02:39:16 GMT

May I know what further information you need to reply back for this issue?

RE: Nrf52832 stopped advertising after disconnect

gokul — Wed, 23 Jan 2019 02:37:57 GMT

I used ble_app_uart for my project and removed UART for reducing current consumption. Below are init code:

#define APP_ADV_INTERVAL 1600 /**< The advertising interval (in units of 0.625 ms. This value corresponds to 40 ms). */

#define APP_ADV_DURATION 18000 /**< The advertising duration (180 seconds) in units of 10 milliseconds. */

#define MIN_CONN_INTERVAL MSEC_TO_UNITS(1000, UNIT_1_25_MS) /**< Minimum acceptable connection interval (20 ms), Connection interval uses 1.25 ms units. */
#define MAX_CONN_INTERVAL MSEC_TO_UNITS(1000, UNIT_1_25_MS) /**< Maximum acceptable connection interval (75 ms), Connection interval uses 1.25 ms units. */
#define SLAVE_LATENCY 0 /**< Slave latency. */
#define CONN_SUP_TIMEOUT MSEC_TO_UNITS(20000, UNIT_10_MS) /**< Connection supervisory timeout (4 seconds), Supervision Timeout uses 10 ms units. */
#define FIRST_CONN_PARAMS_UPDATE_DELAY APP_TIMER_TICKS(100) /**< Time from initiating event (connect or start of notification) to first time sd_ble_gap_conn_param_update is called (5 seconds). */
#define NEXT_CONN_PARAMS_UPDATE_DELAY APP_TIMER_TICKS(500) /**< Time between each call to sd_ble_gap_conn_param_update after the first call (30 seconds). */
#define MAX_CONN_PARAMS_UPDATE_COUNT 7 /**< Number of attempts before giving up the connection parameter negotiation. */

static void gap_params_init(void)
{
uint32_t err_code;
ble_gap_conn_params_t gap_conn_params;
ble_gap_conn_sec_mode_t sec_mode;

BLE_GAP_CONN_SEC_MODE_SET_OPEN(&sec_mode);

err_code = sd_ble_gap_device_name_set(&sec_mode,
(const uint8_t *) DEVICE_NAME,
strlen(DEVICE_NAME));
APP_ERROR_CHECK(err_code);

memset(&gap_conn_params, 0, sizeof(gap_conn_params));

gap_conn_params.min_conn_interval = MIN_CONN_INTERVAL;
gap_conn_params.max_conn_interval = MAX_CONN_INTERVAL;
gap_conn_params.slave_latency = SLAVE_LATENCY;
gap_conn_params.conn_sup_timeout = CONN_SUP_TIMEOUT;

err_code = sd_ble_gap_ppcp_set(&gap_conn_params);
APP_ERROR_CHECK(err_code);

// Update security parameters for connection reply
gst_secparams.bond = SEC_PARAM_BOND;
gst_secparams.mitm = SEC_PARAM_MITM;
gst_secparams.io_caps = SEC_PARAM_IO_CAPABILITIES;
gst_secparams.oob = SEC_PARAM_OOB;
gst_secparams.min_key_size = SEC_PARAM_MIN_KEY_SIZE;
gst_secparams.max_key_size = SEC_PARAM_MAX_KEY_SIZE;
}

static void advertising_init(void)
{
uint32_t err_code;
ble_advertising_init_t init;

memset(&init, 0, sizeof(init));

init.advdata.name_type = BLE_ADVDATA_FULL_NAME;
init.advdata.include_appearance = false;
init.advdata.flags = BLE_GAP_ADV_FLAGS_LE_ONLY_LIMITED_DISC_MODE;

init.srdata.uuids_complete.uuid_cnt = sizeof(m_adv_uuids) / sizeof(m_adv_uuids[0]);
init.srdata.uuids_complete.p_uuids = m_adv_uuids;

init.config.ble_adv_fast_enabled = true;
init.config.ble_adv_fast_interval = APP_ADV_INTERVAL;
init.config.ble_adv_fast_timeout = APP_ADV_DURATION;
init.evt_handler = on_adv_evt;

err_code = ble_advertising_init(&m_advertising, &init);
APP_ERROR_CHECK(err_code);

ble_advertising_conn_cfg_tag_set(&m_advertising, APP_BLE_CONN_CFG_TAG);
}

static void conn_params_init(void)
{
uint32_t err_code;
ble_conn_params_init_t cp_init;

memset(&cp_init, 0, sizeof(cp_init));

cp_init.p_conn_params = NULL;
cp_init.first_conn_params_update_delay = FIRST_CONN_PARAMS_UPDATE_DELAY;
cp_init.next_conn_params_update_delay = NEXT_CONN_PARAMS_UPDATE_DELAY;
cp_init.max_conn_params_update_count = MAX_CONN_PARAMS_UPDATE_COUNT;
cp_init.start_on_notify_cccd_handle = BLE_GATT_HANDLE_INVALID;
cp_init.disconnect_on_fail = false;
// cp_init.evt_handler = on_conn_params_evt;
cp_init.error_handler = conn_params_error_handler;

cp_init.p_conn_params->min_conn_interval = MIN_CONN_INTERVAL;
cp_init.p_conn_params->max_conn_interval = MAX_CONN_INTERVAL;
cp_init.p_conn_params->slave_latency = SLAVE_LATENCY;
cp_init.p_conn_params->conn_sup_timeout = CONN_SUP_TIMEOUT;

err_code = ble_conn_params_init(&cp_init);
APP_ERROR_CHECK(err_code);
}

Reduced tx power level for 10m approx

static void advertising_start(void)
{
printf("\r\n Adv start");
uint32_t err_code = ble_advertising_start(&m_advertising, BLE_ADV_MODE_FAST);
APP_ERROR_CHECK(err_code);

err_code = sd_ble_gap_tx_power_set(BLE_GAP_TX_POWER_ROLE_ADV, m_advertising.adv_handle, TX_POWER_LEVEL);
APP_ERROR_CHECK(err_code);
}

RE: Nrf52832 stopped advertising after disconnect

gokul — Tue, 22 Jan 2019 13:55:10 GMT

I have to reset nrf52832 device to advertise back,

MAC for nrf CA43E77D23DF

MAC for redmi : 65E0BC5D21C0

This issue happens in other phones too but not every time.

RE: Nrf52832 stopped advertising after disconnect

haakonsh — Tue, 22 Jan 2019 13:28:47 GMT

What device do you need to reset, the nRF or the REDMI NOTE?
Also what are the MACs for the two devices?

RE: Nrf52832 stopped advertising after disconnect

gokul — Tue, 22 Jan 2019 11:12:02 GMT

Find this sniffer trace at end devzone.nordicsemi.com/.../BLE_5F00_adv_5F00_stopped.pcap issue happened in REDMI NOTE 4

RE: Nrf52832 stopped advertising after disconnect

stone.xiang — Tue, 22 Jan 2019 08:59:42 GMT

Hi,

Below is the log file.

devzone.nordicsemi.com/.../1513.btsnoop_5F00_hci.log

Tanks.

RE: Nrf52832 stopped advertising after disconnect

haakonsh — Tue, 22 Jan 2019 08:56:29 GMT

We need a sniffer trace and debug log from one of those incidents.

RE: Nrf52832 stopped advertising after disconnect

stone.xiang — Tue, 22 Jan 2019 03:37:19 GMT

Hi,

I found this problemes too in some xiaomi phones,like xiaomi6.

And somes phones cannot find the ble services.

Thanks