<imgsrc="http://www.icedev.se/proxmark3/blueshark/addon_open_1.jpg"alt="Image of blue shark add-on open fit"width="300"><imgsrc="http://www.icedev.se/proxmark3/blueshark/addon_fitted_1.jpg"alt="Image of blue shark add-on fitted"width="300">
#### (1) Connecting your RDV4.0 with Bluetooth on mobile phone or computer
* Open Bluetooth and search for a device named PM3_RDV4.0.
* Enter the paired password 1234 and establish the connection.
* The blue state LED on the add-on will keep blinking after the connection is established. Only when the mobile phone or computer opens the correct COM port, the blue LED turns on solid, indicating that the connection is successful.
* Insert the adapter into the USB port. The adapter will search automatically and establish the connection. The adapter will remember the device that was first connected and after that the same device will be connected.
* The adapter button can be used to delete memory so that other add-on can be searched and connected.<palign='center'>
<imgsrc="https://sneaktechnology.com/wp-content/uploads/2019/06/Button.png"alt="Image of blue shark add-on HC-06 white dongle button"width="200">
* After the connection is established, the blue state LED on add-on will turn on solid.
* look for _CP2104 USB tp UART bridge controller_ under devices in order to get the assigned serial port
#### (1) Connecting rdv4.0 with Bluetooth on MacOS
With MacOS Mojave 10.14.5 you could experience some continuosly disconnecting and difficult to recconnect the device at the system wakeup, to avoid this problem do a PRAM reset before to add your Proxmark3 RDV4 Blue Shark:
1. Open a Terminal and execute this command: sudo rm -R /Library/Preferences/com.apple.Bluetooth.plist.
2. Shut down your Mac.
3. Then turn it on and immediately press and hold these four keys together: Option, Command, P, and R.
4. You can release the keys after about 20 seconds, during which your Mac might appear to restart.
After reboot you can go ahead to pairing your Proxmark3 RDV4 Blue Shark:
5. Make sure the Blue Shark BT switch is turned ON
6. On your Mac, choose Apple menu -> System Preferences, then click Bluetooth.
7. Select the device in the list, then click Connect and add the 1234 pwd.
#### (2) Fast connection using dedicated Bluetooth (HC-06 Master + CP2102) adapter under Android with Termux
1. Make sure you already followed this tutorial https://github.com/RfidResearchGroup/proxmark3/blob/master/doc/termux_notes.md#setup and have Termux with an running Proxmark3 client ready. You need additional the `cp210x` serial usb driver enabled and working, like the `USB_ACM` driver to communicate wireless.
2. Insert the Bluetooth adapter with an fitting USB-C/Micro-USB converter into your Android USB port and a serial port `/dev/ttyUSB0` will be created. To see if it's working, run `tsudo ls /dev/ttyU*` and it should list `/dev/ttyUSB0`.
3. The adapter will search automatically and establish the connection to BlueShark. The adapter will remember the device that was first connected and after that the same device will be connected. After the connection is established, the blue state LED on add-on will turn on solid.
4. If you see this, congratulations, you can run your Proxmark3 client in Termux with `tsudo proxmark3/client/proxmark3 /dev/ttyUSB0`
##### Notes
If you bought your Bluetooth adapter somewhere else, make sure to set the baud rate to 115200 `AT+BAUD8` and PIN `AT+PIN1234` correctly
Bluetooth is connected to Proxmark3 RDV4.0 via UART. The USB and UART interfaces of RDV4.0 can coexist without conflict, and no special switching is required.
There is a heat conductive double-sided tape inside the add-on, which has strong adhesive force. Therefore, if add-on needs to be removed, it needs to be pulled out from the heat sink end with greater efforts. Each disassembly will reduce the viscidity of double-sided tape. When double-sided tape is well protected, it will not affect the second use. Thermal conductivity will be slightly worse and will therefore have a direct impact on the thermal performance of the heat sink.
The battery charging circuit is turned on by default. Any time a USB cable is inserted, the battery will be automatically charged. The red LED will remain bright when charging.
The red LED will be extinguished when charging is completed.
For the better heat dissipation, we have used a cast metal enclosure for the add-on. As a result Bluetooth wireless signals are sacrificed. For example, if the back of add-on is facing the Bluetooth host, the signal is very bad and the distance will be reduced. The best signal strength can be obtained when the front glass faces the Bluetooth host.
If the Proxmark3 is not responding, it may be due to a poor Bluetooth connection. To improve performance, try repositioning the Proxmark3 so the glass face is directed toward the host.
