SDK13 can't receive case BLE_NUS_C_EVT_NUS_TX_EVT:

[Mikhail]

in a ble_nus_c_evt_handler().

SDK13, nRF52, S132.

I made connect success. When it done, I send command to peripherial to start discovery. When event came

case BLE_NUS_C_EVT_DISCOVERY_COMPLETE:

I make

            err_code = ble_nus_c_handles_assign(p_ble_nus_c, p_ble_nus_evt->conn_handle, &p_ble_nus_evt->handles);
        APP_ERROR_CHECK(err_code);

        err_code = ble_nus_c_tx_notif_enable(p_ble_nus_c);
        APP_ERROR_CHECK(err_code);

my peripherial device send some data and I can't receive event that BLE_NUS_C_EVT_NUS_TX_EVT made. What possible reason?

[Mikhail]

download first time- just advertise. it is smartphone app. Second time- I switch on my central with discovery service start.