Nrf51822 device name display is abnormal

[kxct]

static void gap_params_init(void)
{
    const uint8_t name[]={"Scanner:"};
    uint8_t device_name[12];
    
    uint32_t ID_num= m_device_info.Device_UNI_ID % 100000;
    uint32_t                err_code;
    ble_gap_conn_params_t   gap_conn_params;
    ble_gap_conn_sec_mode_t sec_mode;

    memcpy(device_name,name,8);
    device_name[8] = (ID_num%10000)/1000 + 48;
    device_name[9] = (ID_num%1000)/100 + 48;
    device_name[10] = (ID_num%100)/10 + 48;
    device_name[11] = ID_num%10 + 48;
    
    BLE_GAP_CONN_SEC_MODE_SET_OPEN(&sec_mode);

    err_code = sd_ble_gap_device_name_set(&sec_mode,
                                          (const uint8_t *) device_name,
                                          sizeof(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);
}

Device：Nrf51822

SDK：SDK12.3

Device name consists of "scanner:" and four digits。But sometimes the device name display error。An extra character appears in the device name string。 As shown below:

[Edvin]

Hello,

What device do you use for listing the devices? I see that it is a phone from the picture, but what application does it use? Do you see the same in nRF Connect?

What sort of devices are you Scanner:nnnn?¨Are they advertising their names? Or are you connecting to them to see the names?

 

If they are advertising, can you please try to get a sniffer log when the name is displayed incorrectly?

 

Best regards,

Edvin