esp32 arduino ble 有时扫描结果不完全的解决方案

问题描述：

用esp32 做扫描应用时发现一个bug

本来想用esp32做ble扫描我的小米手环3广播信号，，实际操作时发现一个bug

在回调函数中的扫描总是扫描不到设备名？？？？

翻阅源码后发现

具体在下面这个ble库里

#include <BLEScan.h>

 

 

 

在如图所示位置加入代码即可解决问题。。。

 

/*
 * BLEScan.cpp
 *
 *  Created on: Jul 1, 2017
 *      Author: kolban
 */
#include "sdkconfig.h"
#if defined(CONFIG_BT_ENABLED)


#include <esp_err.h>

#include <map>

#include "BLEAdvertisedDevice.h"
#include "BLEScan.h"
#include "BLEUtils.h"
#include "GeneralUtils.h"
#include "esp32-hal-log.h"

/**
 * Constructor
 */
BLEScan::BLEScan() {
	m_scan_params.scan_type          = BLE_SCAN_TYPE_PASSIVE; // Default is a passive scan.
	m_scan_params.own_addr_type      = BLE_ADDR_TYPE_PUBLIC;
	m_scan_params.scan_filter_policy = BLE_SCAN_FILTER_ALLOW_ALL;
	m_pAdvertisedDeviceCallbacks     = nullptr;
	m_stopped                        = true;
	m_wantDuplicates                 = false;
	setInterval(100);
	setWindow(100);
} // BLEScan


/**
 * @brief Handle GAP events related to scans.
 * @param [in] event The event type for this event.
 * @param [in] param Parameter data for this event.
 */
void BLEScan::handleGAPEvent(
	esp_gap_ble_cb_event_t  event,
	esp_ble_gap_cb_param_t* param) {
  //char* zhoufeng_pHex = BLEUtils::buildHexData(nullptr, (uint8_t*)param->scan_rst.ble_adv, param->scan_rst.adv_data_len + param->scan_rst.scan_rsp_len);
//	printf("\n\n(event(%d):event2(%d):p>>(%s)\r\n)",event,param->scan_rst.search_evt,zhoufeng_pHex);//还有信息
	switch(event) {

		// ---------------------------
		// scan_rst:
		// esp_gap_search_evt_t search_evt
		// esp_bd_addr_t bda
		// esp_bt_dev_type_t dev_type
		// esp_ble_addr_type_t ble_addr_type
		// esp_ble_evt_type_t ble_evt_type
		// int rssi
		// uint8_t ble_adv[ESP_BLE_ADV_DATA_LEN_MAX]
		// int flag
		// int num_resps
		// uint8_t adv_data_len
		// uint8_t scan_rsp_len
		case ESP_GAP_BLE_SCAN_RESULT_EVT: {
				
			switch(param->scan_rst.search_evt) {
				//
				// ESP_GAP_SEARCH_INQ_CMPL_EVT
				//
				// Event that indicates that the duration allowed for the search has completed or that we have been
				// asked to stop.
				case ESP