Monday, November 16, 2009

Configuration of Blue Tooth?

How do I configure my PC's blue tooth to find my cell phone or the other way around. Looking to upload my cell phone pictures to my PC.

Configuration of Blue Tooth?
Setting up connections


Any Bluetooth device will transmit the following sets of information on demand





Device Name


Device Class


List of services


Technical information eg: device features, manufacturer, Bluetooth specification, clock offset


Any device may perform an "inquiry" to find other devices to which to connect, and any device can be configured to respond to such inquiries. However if the device trying to connect knows the address of the device it will always respond to direct connection requests and will transmit the information shown in the list above if requested for it. Use of the device's services however may require pairing or its owner to accept but the connection itself can be started by any device and be held until it goes out of range. Some devices can only be connected to one device at a time and connecting to them will prevent them from connecting to other devices and showing up in inquiries until they disconnect the other device.





Every device has a unique 48-bit address. However these addresses are generally not shown in inquiries and instead friendly "Bluetooth names" are used which can be set by the user, and will appear when another user scans for devices and in lists of paired devices. Most phones have the Bluetooth name set to the manufacturer and model of the phone by default. Most phones and laptops will only show the Bluetooth names and special programs are required to get additional information about remote devices. This can get confusing with activities such as Bluejacking as there could be several phones in range named "T610" for example. On Nokia phones the Bluetooth address may be found by entering "*#2820#". On computers running Linux the address and class of a USB Bluetooth dongle may be found by entering "hciconfig hci0 class" as root ("hci0" may need to be replaced by another device name).





BD Address: 00:10:60:A7:93:19 ACL MTU: 192:8 SCO MTU: 64:8


Class: 0x020005


Service Classes: Networking


Device Class: Miscellaneous,


Every device also has a 24-bit class identifier. This provides information on what kind of a device it is (Phone, Smartphone, Computer, Headset, etc), which will also be transmitted when other devices perform an inquiry. On some phones this information is translated into a little icon displayed beside the device's name.





Bluetooth devices will also transmit a list of services if requested by another device; this also includes some extra information such as the name of the service and what channel it is on. These channels are virtual and have nothing to do with the frequency of the transmission, much like TCP ports. A device can therefore have multiple identical services.





Browsing 00:0E:ED:B0:AF:34 ...


Service Name: OBEX Object Push


Service RecHandle: 0x10000


Service Class ID List:


"OBEX Object Push" (0x1105)


Protocol Descriptor List:


"L2CAP" (0x0100)


"RFCOMM" (0x0003)


Channel: 9


"OBEX" (0x0008)


Language Base Attr List:


code_ISO639: 0x454e


encoding: 0x6a


base_offset: 0x100


Profile Descriptor List:


"OBEX Object Push" (0x1105)


Version: 0x0100


Technical data used for managing the connection may also be extracted from a device.





BD Address: 00:11:24:B3:50:FB


Device Name: My little special laptop


LMP Version: 2.0 (0x3) LMP Subversion: 0x7ad


Manufacturer: Cambridge Silicon Radio (10)


Features: 0xff 0xff 0x8f 0xfe 0x9b 0xf9 0x00 0x80


%26lt;3-slot packets%26gt; %26lt;5-slot packets%26gt; %26lt;encryption%26gt; %26lt;slot offset%26gt;


%26lt;timing accuracy%26gt; %26lt;role switch%26gt; %26lt;hold mode%26gt; %26lt;sniff mode%26gt;


%26lt;park state%26gt; %26lt;RSSI%26gt; %26lt;channel quality%26gt; %26lt;SCO link%26gt; %26lt;HV2 packets%26gt;


%26lt;HV3 packets%26gt; %26lt;A-law log%26gt; %26lt;CVSD%26gt; %26lt;paging scheme%26gt;


%26lt;power control%26gt; %26lt;transparent SCO%26gt; %26lt;broadcast encrypt%26gt;


%26lt;EDR ACL 2 Mbps%26gt; %26lt;EDR ACL 3 Mbps%26gt; %26lt;enhanced iscan%26gt;


%26lt;interlaced iscan%26gt; %26lt;interlaced pscan%26gt; %26lt;inquiry with RSSI%26gt;


%26lt;extended SCO%26gt; %26lt;EV4 packets%26gt; %26lt;EV5 packets%26gt; %26lt;AFH cap. slave%26gt;


%26lt;AFH class. slave%26gt; %26lt;3-slot EDR ACL%26gt; %26lt;5-slot EDR ACL%26gt;


%26lt;AFH cap. master%26gt; %26lt;AFH class. master%26gt; %26lt;EDR eSCO 2 Mbps%26gt;


%26lt;EDR eSCO 3 Mbps%26gt; %26lt;3-slot EDR eSCO%26gt; %26lt;extended features
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