PC程序为什么搜索不到蓝牙设备？

2012-07-11 09:42:22 953 阅读 AI 写同款 · GEO 优化AI 选题数据监测一键分发 ›

小程序开发环境搭建：蓝牙设备连接方案本文旨在为开发者提供微信小程序蓝牙开发的完整指南，涵盖从环境配置到实际开发的各个环节。我们将重点介绍低功耗蓝牙(BLE)在小程序中的实现方案。核心概念与联系：理解蓝牙通信的基本原理开发环境搭建：准备必要的硬件和软件代码实现：分步骤实现蓝牙连接功能实际应用场景：典型蓝牙应用案例分析常见问题与解决方案BLE：低功耗蓝牙(Bluetooth Low Energy)，一种省电的蓝牙通信协议UUID：通用唯一标识符，用于识别蓝牙服务和特征Service：蓝牙服务，设备提供的功能集合。阅读详情

PC为XP SP3，ThinkPad SL400，自带有蓝牙功能，现在我在PC旁边打开手机蓝牙，使用PC的蓝牙搜索，可以搜索到手机蓝牙。
但是我自己编写的程序为什么就搜索不到呢？代码如下：



int _tmain(int argc, _TCHAR* argv[])

{

	WSADATA wsaData;

	DWORD dwResult;

	HANDLE hLookup = 0;

	WSAQUERYSET lpRestrictions;

	GUID guid = SVCID_HOSTNAME;

	dwResult = WSAStartup(MAKEWORD(2,2), &wsaData);



	if (dwResult != 0)

	{

		printf("Cannot startup Winsock, error code %d\n", dwResult);

		exit(1);

	}

	else

		printf("WSAStartup is OK!\n");



	ZeroMemory(&lpRestrictions, sizeof(WSAQUERYSET));

	lpRestrictions.dwSize = sizeof(WSAQUERYSET);

	lpRestrictions.lpServiceClassId = &guid;



	dwResult = WSALookupServiceBegin(&lpRestrictions, LUP_RETURN_NAME, &hLookup);

	if (dwResult != SOCKET_ERROR)

	{

		DWORD dwLength = 0;

		WSAQUERYSET * pqs = NULL;



		printf("WSALookupServiceBegin() is OK!\r\n");



		pqs = (WSAQUERYSET *) malloc(sizeof(WSAQUERYSET) + 100);

		dwLength = sizeof(WSAQUERYSET) + 100;



		do

		{

			if (WSALookupServiceNext(hLookup, 0, &dwLength, pqs) != 0)

			{

				dwResult = WSAGetLastError();

				if((dwResult == WSA_E_NO_MORE) || (dwResult == WSAENOMORE))

				{

					printf("No more record found!\n");

					break;

				}

				printf("WSALookupServiceNext() failed with error code %d\n", WSAGetLastError());

			}

			else

			{

				dwResult = 0;

				printf("WSALookupServiceNext() looks fine!\r\n");

			}



			if (dwResult == WSAEFAULT)

			{

				if (pqs)

				{

					printf("Freeing pqs...\r\n");

					free(pqs);

				}



				// Reallocate



				pqs = (WSAQUERYSET *) malloc(dwLength);

				if (!pqs)

				{

					printf("Could not allocate memory: %d\n", GetLastError());

					exit(2);



				}

				else

				{

					printf("Memory allocated for pqs successfully!\r\n");

					continue;

				}

			}



			// Output it since we have it now

			if ((dwResult == 0) && (pqs))

			{

				printf("  Service instance name: %S\n", pqs->lpszServiceInstanceName);

				printf("  Name space num: %d\r\n", pqs->dwNameSpace);

				printf("  Num of protocols: %d\r\n", pqs->dwNumberOfProtocols);

				//printf("  Version: %d\r\n", pqs->lpVersion->dwVersion);

			}

		} while ((dwResult != WSA_E_NO_MORE) && (dwResult != WSAENOMORE));



		// clean-up



		free(pqs);

		if(WSALookupServiceEnd(hLookup) == 0){

			printf("hLookup handle was released!\n");

		}

		else{

			printf("WSALookupServiceEnd(hLookup) failed with error code %d\n", WSAGetLastError());

		}



	}

	else

	{

		printf("Error on WSALookupServiceBegin: %d\n", WSAGetLastError());

		exit(3);

	}



	if(WSACleanup() == 0){

		printf("WSACleanup() is OK!\n");

	}

	else{

		printf("WSACleanup() failed with error code %d\n", WSAGetLastError());

	}



	printf("按回车键退出!\n");

	char c = getchar();

	return 0;

}

搜索到的结果一直是：
WSAStartup is OK
WSALookupServiceBegin() is OK!
WSALookupServiceNext() looks fine！
Service instance name:FHJUN2007 //这是该PC的电脑名，应该是手机的呀
Name space num:12 //应该是16(NS_BTH)吧，而不是12(NS_DNS)
Num of protocols:0
No more record found!
hLookup handle was released!

...全文