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Active和Passive两种扫描模式下，接收到的BLE广播报文的不同

news 2026/5/23 17:03:04

一、Active和Passive

微软官方文档BluetoothLEScanningMode Enum (Windows.Devices.Bluetooth.Advertisement) - Windows apps | Microsoft Learn

翻译

二、Active

1、代码

#include <iostream> #include <windows.h> #include <winrt/Windows.Foundation.h> #include <winrt/Windows.Foundation.Collections.h> #include <winrt/Windows.Devices.Bluetooth.Advertisement.h> #include <winrt/Windows.Storage.Streams.h> #include <atomic> #include <string> #include <sstream> #include <vector> #include <mutex> #include <iomanip> #include <chrono> using namespace winrt; using namespace Windows::Foundation; using namespace Windows::Devices::Bluetooth::Advertisement; using namespace Windows::Storage::Streams; BluetoothLEAdvertisementWatcher g_watcher{nullptr}; std::string BluetoothAddressToString(uint64_t address){ std::stringstream ss; ss << std::setw(2) << std::setfill('0') << std::hex << ((address >> 40) & 0xFF) << ":" << ((address >> 32) & 0xFF) << ":" << ((address >> 24) & 0xFF) << ":" << ((address >> 16) & 0xFF) << ":" << ((address >> 8) & 0xFF) << ":" << (address & 0xFF); return ss.str(); } std::string WStringToUtf8(const std::wstring& wstr) { if(wstr.empty()){ return ""; } int size=WideCharToMultiByte(CP_UTF8,0,wstr.c_str(),-1,nullptr,0,nullptr,nullptr); std::string str(size-1,0); WideCharToMultiByte(CP_UTF8,0,wstr.c_str(),-1,&str[0],size,nullptr,nullptr); return str; } void OnAdvertisementReceived(BluetoothLEAdvertisementWatcher sender, BluetoothLEAdvertisementReceivedEventArgs args) { std::string sout=""; auto now = std::chrono::system_clock::now(); auto ms = std::chrono::duration_cast<std::chrono::milliseconds>(now.time_since_epoch()).count()%10000; std::string mac = BluetoothAddressToString(args.BluetoothAddress()); sout+="["; sout+=std::to_string(ms); sout+= "ms]"; sout+= mac; sout+= " "; std::wstring name = args.Advertisement().LocalName().c_str(); if(!name.empty()){ sout+= WStringToUtf8(name)+" "; }else{ sout+="[Empty name]"; } sout+="UUIDS: "; for(const auto& uuid : args.Advertisement().ServiceUuids()){ sout+= WStringToUtf8(winrt::to_hstring(uuid).c_str()); } std::cout<<sout<<std::endl; std::cout<<std::flush; } int main() { winrt::init_apartment(winrt::apartment_type::multi_threaded); std::cout<<"Starting BLE Scanner......"<<std::endl; g_watcher = BluetoothLEAdvertisementWatcher(); g_watcher.ScanningMode(BluetoothLEScanningMode::Active); g_watcher.Received(OnAdvertisementReceived); g_watcher.Start(); std::cout<<"Scanning.....Press Enter to stop."<<std::endl; std::cin.get(); g_watcher.Stop(); std::cout<<"Stopped."<<std::endl; return 0; }

2、编译连接

打开Developer Command Prompt for VS 2022

cl /EHsc /MD /std:c++17 /Fe:BleActive.exe main.cpp windowsapp.lib

3、运行程序

打开蓝牙，运行程序

三、Passive

1、代码

#include <iostream> #include <windows.h> #include <winrt/Windows.Foundation.h> #include <winrt/Windows.Foundation.Collections.h> #include <winrt/Windows.Devices.Bluetooth.Advertisement.h> #include <winrt/Windows.Storage.Streams.h> #include <atomic> #include <string> #include <sstream> #include <vector> #include <mutex> #include <iomanip> #include <chrono> using namespace winrt; using namespace Windows::Foundation; using namespace Windows::Devices::Bluetooth::Advertisement; using namespace Windows::Storage::Streams; BluetoothLEAdvertisementWatcher g_watcher{nullptr}; std::string BluetoothAddressToString(uint64_t address){ std::stringstream ss; ss << std::setw(2) << std::setfill('0') << std::hex << ((address >> 40) & 0xFF) << ":" << ((address >> 32) & 0xFF) << ":" << ((address >> 24) & 0xFF) << ":" << ((address >> 16) & 0xFF) << ":" << ((address >> 8) & 0xFF) << ":" << (address & 0xFF); return ss.str(); } std::string WStringToUtf8(const std::wstring& wstr) { if(wstr.empty()){ return ""; } int size=WideCharToMultiByte(CP_UTF8,0,wstr.c_str(),-1,nullptr,0,nullptr,nullptr); std::string str(size-1,0); WideCharToMultiByte(CP_UTF8,0,wstr.c_str(),-1,&str[0],size,nullptr,nullptr); return str; } void OnAdvertisementReceived(BluetoothLEAdvertisementWatcher sender, BluetoothLEAdvertisementReceivedEventArgs args) { std::string sout=""; auto now = std::chrono::system_clock::now(); auto ms = std::chrono::duration_cast<std::chrono::milliseconds>(now.time_since_epoch()).count()%10000; std::string mac = BluetoothAddressToString(args.BluetoothAddress()); sout+="["; sout+=std::to_string(ms); sout+= "ms]"; sout+= mac; sout+= " "; std::wstring name = args.Advertisement().LocalName().c_str(); if(!name.empty()){ sout+= WStringToUtf8(name)+" "; }else{ sout+="[Empty name]"; } sout+="UUIDS: "; for(const auto& uuid : args.Advertisement().ServiceUuids()){ sout+= WStringToUtf8(winrt::to_hstring(uuid).c_str()); } std::cout<<sout<<std::endl; std::cout<<std::flush; } int main() { winrt::init_apartment(winrt::apartment_type::multi_threaded); std::cout<<"Starting BLE Scanner......"<<std::endl; g_watcher = BluetoothLEAdvertisementWatcher(); g_watcher.ScanningMode(BluetoothLEScanningMode::Passive); g_watcher.Received(OnAdvertisementReceived); g_watcher.Start(); std::cout<<"Scanning.....Press Enter to stop."<<std::endl; std::cin.get(); g_watcher.Stop(); std::cout<<"Stopped."<<std::endl; return 0; }