Bluetooth discovery in Qt Mobility may not report devices (Nokia C6) - Revision history

Hamishwillee: Text replace - "Category:Connectivity" to ""

2013-05-30T23:27:06Z

Text replace - "Category:Connectivity" to ""

Hamishwillee: Text replace - "Category:MeeGo" to "Category:MeeGo Harmattan"

2012-06-13T10:51:29Z

Text replace - "Category:MeeGo" to "Category:MeeGo Harmattan"

Hamishwillee: Hamishwillee - Addition to article of: Category:MeeGo Category:Symbian. (Add platform categories)

2012-02-15T05:52:37Z

Hamishwillee - Addition to article of: Category:MeeGo Category:Symbian. (Add platform categories)

Hamishwillee: Hamishwillee - Update Abstract

2011-12-01T02:42:13Z

Hamishwillee - Update Abstract

Hamishwillee: moved Qt Mobility Bluetooth discovery omits devices in the cache to Bluetooth discovery in Qt Mobility may not report devices (Nokia C6): Original report incorrect

2011-12-01T02:40:08Z

moved Qt Mobility Bluetooth discovery omits devices in the cache to Bluetooth discovery in Qt Mobility may not report devices (Nokia C6): Original report incorrect

Devnull: Devnull -

2011-11-30T13:47:57Z

Devnull -

Devnull: Devnull -

2011-11-30T13:44:06Z

Devnull -

Hamishwillee: moved QtBluetoothDeviceDiscovery to Qt Mobility Bluetooth discovery omits devices in the cache: Less ambiguous name

2011-11-28T23:54:34Z

moved QtBluetoothDeviceDiscovery to Qt Mobility Bluetooth discovery omits devices in the cache: Less ambiguous name

Hamishwillee: Hamishwillee - Subedit

2011-11-28T23:53:11Z

Hamishwillee - Subedit

Devnull: Devnull -

2011-11-24T09:46:41Z

Devnull -

@@ Line 1: / Line 1: @@
-[[Category:Qt Mobility]][[Category:Connectivity]][[Category:Bluetooth]]
+[[Category:Qt Mobility]][[Category:Bluetooth]]
 {{Abstract|Bluetooth discovery in Qt Mobility may not report devices. }}
 {{ArticleMetaData

← Older revision		Revision as of 10:51, 13 June 2012
Line 38:		Line 38:
	== Solution ==		== Solution ==

−	There is no known solution or workaround for the problem.[[Category:MeeGo]] [[Category:Symbian]]	+	There is no known solution or workaround for the problem.[[Category:MeeGo Harmattan]] [[Category:Symbian]]

← Older revision		Revision as of 05:52, 15 February 2012
Line 38:		Line 38:
	== Solution ==		== Solution ==

−	There is no known solution or workaround for the problem.	+	There is no known solution or workaround for the problem.[[Category:MeeGo]] [[Category:Symbian]]

@@ Line 23: / Line 23: @@
 == Description==
-Qt Bluetooth device discovery is achieved using the Qt Mobility API [http://doc.qt.nokia.com/qtmobility-1.2/qbluetoothdevicediscoveryagent.html QBluetoothDeviceDiscoveryAgent] {{Icode|start()}} method. On Symbian this may not result any devices when both bluetooth audi and wireless data connection are active.
+Bluetooth device discovery on Symbian using the Qt Mobility API [http://doc.qt.nokia.com/qtmobility-1.2/qbluetoothdevicediscoveryagent.html QBluetoothDeviceDiscoveryAgent]  may not report some local devices when both Bluetooth audio and wireless data connections are active.
 == How to reproduce ==

@@ Line 23: / Line 23: @@
 == Description==
-Qt Bluetooth device discovery is achieved using the Qt Mobility API [http://doc.qt.nokia.com/qtmobility-1.2/qbluetoothdevicediscoveryagent.html QBluetoothDeviceDiscoveryAgent] {{Icode|start()}} method. On Symbian this will only discover ''new'' devices, ignoring those that have been previously cached.
+Qt Bluetooth device discovery is achieved using the Qt Mobility API [http://doc.qt.nokia.com/qtmobility-1.2/qbluetoothdevicediscoveryagent.html QBluetoothDeviceDiscoveryAgent] {{Icode|start()}} method. On Symbian this may not result any devices when both bluetooth audi and wireless data connection are active.
-−
-The reason for this is that the Symbian implementation explicitly ignores cached results by setting the {{Icode|KHostResIgnoreCache}} flag:
-<code cpp>
-void BluetoothLinkManagerDeviceDiscoverer::startDiscovery(const uint discoveryType)
-−
-...
-m_addr.SetAction(KHostResInquiry | KHostResName | KHostResIgnoreCache);
-...
-−
-</code>
 == How to reproduce ==
-Connect the Bluetooth headset and start listen an internet radio over the wireless lan.
+Connect a Bluetooth headset and start listening an internet radio over the wireless network.
-Attempt to discover bluetooth devices. No devices are discovered - and in the Qt Creator debug window you can see the following messages
+Attempt to discover bluetooth devices with the API. No devices are discovered - and in the Qt Creator debug window you can see the following messages
 <code text>
 [Qt Message] void QtMobility::BluetoothLinkManagerDeviceDiscoverer::RunL() 0
@@ Line 45: / Line 35: @@
 </code>
 Where -25 means {{Icode|KErrHostResNoMoreResults}}.
 == Solution ==
 There is no known solution or workaround for the problem.

@@ Line 1: / Line 1: @@
-[[Category:Qt Mobility]][[Category:Connectivity]][[Category:Qt]]
+[[Category:Qt Mobility]][[Category:Connectivity]][[Category:Bluetooth]]
-{{Abstract| Qt Bluetooth discovery omit the devices in the cache from the results }}
+{{Abstract|Bluetooth discovery in Qt Mobility does not report devices in the cache. }}
-−
 {{ArticleMetaData
 |sourcecode= http://doc.qt.nokia.com/qtmobility-1.2/btscanner.html
 |installfile=
 |devices= Nokia C6-01
-|sdk= [http://qt.nokia.com/downloads/ Nokia Qt SDK 1.1.4] -->
+|sdk= [http://qt.nokia.com/downloads/ Nokia Qt SDK 1.1.4]
-|platform=  Qt mobility 1.2.1 and later -->
+|platform=  Qt mobility 1.2.1 and later
-|devicecompatability= must have internal bluetooth -->
+|devicecompatability=All with internal Bluetooth
-|signing=
+|signing=DevCert required
 |capabilities= ReadDeviceData LocalServices WriteDeviceData
 |keywords= QBluetoothDeviceDiscoveryAgent, BluetoothLinkManagerDeviceDiscoverer
@@ Line 18: / Line 17: @@
 |update-by=<!-- After significant update: [[User:username]]-->
 |update-timestamp=<!-- After significant update: YYYYMMDD -->
-|creationdate= <!-- Format YYYYMMDD -->
+|creationdate=20111124
-|author= <!-- Display as link [[User:username]] -->
+|author=[[User:Devnull]]
 }}
 == Description==
-Bluetooth devices which are listed in the cache cannot be retrieved with Qt mobility APIs
+Qt Bluetooth device discovery is achieved using the Qt Mobility API [http://doc.qt.nokia.com/qtmobility-1.2/qbluetoothdevicediscoveryagent.html QBluetoothDeviceDiscoveryAgent] {{Icode|start()}} method. On Symbian this will only discover ''new'' devices, ignoring those that have been previously cached.
-== How to reproduce ==
+The reason for this is that the Symbian implementation explicitly ignores cached results by setting the {{Icode|KHostResIgnoreCache}} flag:
+<code cpp>
-Bluetooth device names are cached after each inquiry. Upon a new paired device process is initiated, these cached devices shown first to the user for convinience.
-−
-Similar inquiry can be initiated with Qt mobility APIs using QBluetoothDeviceDiscoveryAgent::start() method.
-−
-The result that this Qt mobility APIs provide can be shorter however. It is possible to receive the following output in Qt creator before all of the available devices shown:
-<code>
-[Qt Message] void QtMobility::BluetoothLinkManagerDeviceDiscoverer::RunL() 0
-[Qt Message] void QtMobility::BluetoothLinkManagerDeviceDiscoverer::RunL() -25
-</code>
-−
-Where -25 means KErrHostResNoMoreResults after the first device is reported. The reason for such short list is devices which were previusly cached are ignored by the API by using explicitly the KHostResIgnoreCache flag upon the discovery:
-−
 <code>
 void BluetoothLinkManagerDeviceDiscoverer::startDiscovery(const uint discoveryType)
+{
@@ Line 48: / Line 34: @@
+}
 </code>
 == Solution ==
- There is no known solution or workaround for the problem.
+There is no known solution or workaround for the problem.

← Older revision		Revision as of 09:46, 24 November 2011
Line 1:		Line 1:
−	[[Category:Qt Mobility]][[Category:Connectivity]]	+	[[Category:Qt Mobility]][[Category:Connectivity]][[Category:Qt]]
	{{Abstract\| Qt Bluetooth discovery omit the devices in the cache from the results }}		{{Abstract\| Qt Bluetooth discovery omit the devices in the cache from the results }}