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--- bluetooth [2015/01/06 17:53] – [Bluetooth] tony
+++ bluetooth [2024/05/28 16:52] (current) – [USB 3 Port] tony
@@ Line 1: / Line 1: @@
 ===== Bluetooth =====
-The Twiddler3 operates in both Wired, via USB, and Wireless, via Bluetooth 2.1 (Class 2, BT 2.1 + EDR) HID Profile.  When in Bluetooth mode, the Twiddler3 must be paired before it will start sending keystrokes and mouse data to your host device. {{http://upload.wikimedia.org/wikipedia/commons/thumb/d/da/Bluetooth.svg/2000px-Bluetooth.svg.png?100x155}}
+{{ https://upload.wikimedia.org/wikipedia/commons/thumb/d/da/Bluetooth.svg/2000px-Bluetooth.svg.png?100x155}}
+The Twiddler3 operates in both Wired, via USB, and Wireless, via Bluetooth 2.1 (Class 2, BT 2.1 + EDR) HID Profile.  When in Bluetooth mode, the Twiddler3 must be paired before it will start sending keystrokes and mouse data to your host device.
 ==== Pairing ====
@@ Line 9: / Line 10: @@
 If you do not see the Twiddler appear in your Bluetooth Device list, make sure the Twiddler is powered on and the Status LED is blinking 2 short Green blinks every second. If the LED is blinking but the Twiddler is not in the list, or if you see a device named “FireFly”, press N+S R000 to reset the pair on the Twiddler.
+==== Multiple Device Pairing ====
+You can pair your Twiddler3 with many different Bluetooth devices.  The Twiddler3 stores the last 8 devices it has paired with in its Paired Device Table (PDT).  This FIFO table records all the information required to make a quick connection to a new host device.
+For security reasons, the Twiddler3 will only connect to one host at a time. Connecting to another device that is already in the Twiddler's PDT is as simple as turning off the Bluetooth of the currently connected host, which sends the Twiddler into the scanning mode, and turning on the Bluetooth of the other host.  The Twiddler will find the new host's credentials in the PDT and do a quick connect with it.
+If you have more than one paired Bluetooth device in range, the Twiddler will connect with one of them.  Which one of them it connects with is based on where in the scanning cycle the host happens to be in at the time the Twiddler detects it.  There is no preference given to any paired device in the PDT when scanning for a new host.  It will pair with the first device in the PDT that it detects.
 ==== Power Saving =====
-After 5 minutes of inactivity, no button presses or mouse movement, the Twiddler3 will go into a sleep mode.  This sleep mode deactivates the Bluetooth Radio and disconnects from the host device.  In order to wake up the Twiddler3 from sleep mode, just push down on the Joystick as you would issue a "right mouse click".  You will see the Status LED blink green while the BT Radio is reactivated and repaired with your host device.  This is usually done automatically and within 2-5 seconds.  Actual pair times vary and are dependent on your host device.  You can use the Twiddler3 as usual once the pairing procedure has completed.  The Status LEDs will stop blinking once the pair has completed.
+In order to conserve power, you can set the Idle Sleep Mode in [[tuner_edit#settings_editor|Twiddler Tuner]]. After a defined period of time of inactivity, no button presses or mouse movement, the Twiddler3 will go into a sleep mode.  This sleep mode deactivates the Bluetooth Radio and disconnects from the host device.  In order to wake up the Twiddler3 from sleep mode, just push down on the Joystick as you would issue a "right mouse click".  You will see the Status LED blink green while the BT Radio is reactivated and repaired with your host device.  This is usually done automatically and within 2-5 seconds.  Actual pair times vary and are dependent on your host device.  You can use the Twiddler3 as usual once the pairing procedure has completed.  The Status LEDs will stop blinking once the pair has completed.
 ==== Radio =====
@@ Line 17: / Line 25: @@
 The Twiddler3 uses a Microchip RN42HID-I/RM Bluetooth Radio.
+==== USB 3 Port ====
+If you have a Bluetooth dongle connected to a USB 3 port on your host, you may experience decreased Bluetooth performance.  Popular motherboard manufacturers, like Asus, have white papers on this subject.
+Here are links to:
+  - The Asus white paper:
+    * [[https://www.asus.com/support/FAQ/1004004/]] \\ \\
+  - The Intel white paper:
+    * {{https://www.usb.org/sites/default/files/327216.pdf| Download from USB.org}}
+    * {{https://tgimages.s3.mazonaws.com/twiddler/wiki/USB3 RF Impact on 2.4GHz devices - INTEL.pdf| Download Local copy}}
+The easiest solution to mitigate the RF interference is to get a USB extender cable and plug the dongle further away from the host's USB 3 port.

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