How to check if Bluetooth is on or off using Symbian C++

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24 Sep
2009

Article Review by fasttrack (20090924)

Article shows a function to check out whether the Bluetooth of our device is on or off. Function returns true for on-bluetooth and false for off-Bluetooth. In Bluetooth application we have to first check that if Bluetooth of the device is on/off. Then we have to give another instruction. At that time this function is useful. Image which shows the use of this application is a good improvement.

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The following Symbian C++ code snippet checks whether Bluetooth is available (on or off) by attempting to open a Bluetooth socket.

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Created: neois (03 May 2007)

Last edited: hamishwillee (24 Jan 2012)

TBool GetBluetoothOn() // BTONOFF 
{ 
	// Create and initialise an RHostResolver 
	RHostResolver hr; 
	TInt res = false; 
	TBool ret; 
 
	RSocketServ socketServer; 
	User::LeaveIfError(socketServer.Connect()); 
	CleanupClosePushL(socketServer); 
 
	res = hr.Open(socketServer, KBTAddrFamily, BTLinkManager); 
 
	if (KErrNone != res) { 
	// if not success, this means bluetooth is not on 
	ret = EFalse; 
	} 
 
	else 
	{ 
	ret = ETrue; // Bluetooth is already ON 
	hr.Close(); 
	} 
 
	CleanupStack::PopAndDestroy(1); 
 
	return ret; 
}