BluetoothFindNextDevice can't find BLE device

猿小白 1 Reputation point
2020-09-01T10:19:35.99+00:00

BluetoothFindNextDevice and BluetoothFindFirstDevice functions can't find BLE mouse. I am sure the mouse is in discovering state. I can find the mouse via System Settings-> Bluetooth. How to find BLE device programmatically?

Windows API - Win32
Windows API - Win32
A core set of Windows application programming interfaces (APIs) for desktop and server applications. Previously known as Win32 API.
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  1. Rita Han - MSFT 2,161 Reputation points
    2020-09-03T08:55:47.22+00:00

    Hello,

    The following code sample can find BLE mouse for me. You can have a try. 

    BOOL FindDevice()
{
wcout.imbue(locale(""));

HBLUETOOTH_RADIO_FIND hbf = NULL;
HANDLE hbr = NULL;
HBLUETOOTH_DEVICE_FIND hbdf = NULL;
BLUETOOTH_FIND_RADIO_PARAMS btfrp = { sizeof(BLUETOOTH_FIND_RADIO_PARAMS) }; 
BLUETOOTH_RADIO_INFO bri = { sizeof(BLUETOOTH_RADIO_INFO) }; 
BLUETOOTH_DEVICE_SEARCH_PARAMS btsp = { sizeof(BLUETOOTH_DEVICE_SEARCH_PARAMS) };
BLUETOOTH_DEVICE_INFO btdi = { sizeof(BLUETOOTH_DEVICE_INFO) };  

hbf = BluetoothFindFirstRadio(&btfrp, &hbr); 

bool brfind = hbf != NULL;

UINT radioCount = 0;

while (brfind)
{
if (BluetoothGetRadioInfo(hbr, &bri) == ERROR_SUCCESS)
{
cout << "\n ### " << radioCount++ << ", Bluetooth radio information:";
cout << "\n Class of device: 0x" << uppercase << hex << bri.ulClassofDevice;
wcout << ", Name:" << bri.szName << endl;  

btsp.hRadio = hbr;  
btsp.fReturnAuthenticated = TRUE;
btsp.fReturnConnected = FALSE;
btsp.fReturnRemembered = TRUE;
btsp.fReturnUnknown = TRUE;
btsp.fIssueInquiry = TRUE;
btsp.cTimeoutMultiplier = 20;
hbdf = BluetoothFindFirstDevice(&btsp, &btdi);

bool bfind = hbdf != NULL;

UINT deviceCount = 0;

while (bfind)
{
cout << "\n *** "<< deviceCount++ << ", Bluetooth device information:";
wcout << "\n [Name]:" << btdi.szName;  
cout << ", [Address]:0x" << uppercase << hex << btdi.Address.ullLong;
//printf(", Authenticated: %d, Connected: %d, Remembered: %d \n", btdi.fAuthenticated, btdi.fConnected, btdi.fRemembered);
cout << ", Authenticated:" << (btdi.fAuthenticated ? TRUE : FALSE);
cout << ", Connected:" << (btdi.fConnected ? TRUE : FALSE);
cout << ", Remembered:" << (btdi.fRemembered ? TRUE : FALSE);

bfind = BluetoothFindNextDevice(hbdf, &btdi);
}
}

if(hbf != NULL)
    brfind = BluetoothFindNextRadio(hbf, &hbr);
}

if(NULL != hbf)
    BluetoothFindRadioClose(hbf);

return TRUE;
}

    Thank you!

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