Connecting the dongle to the Arduino Board requires removing the plastic covering from the dongle and soldering wires to 4 of the pins

Remove the plastic covering from the USB dongle

Once the cover is off, the RF dongle board will be as shown in the picture below

Find the 4 pins, located in the center of the board.

Starting at the end with the ‘ + ‘ sign the pin assignments are:

Connect a 4 pin connector into these pins

Connect wires to these 4 pins, leaving enough wire to connect to the Arduino

Use a Knife to destroy the connections from these PINs to the Chip inside the RF dongle.This is to ensure that the brain wave signals received from the Mindwave is sent to the Arduino and no the internal chip in the RF dongle

The Mindwave RF dongle uses a 3.3 V power.Connect the +ve of the RF dongle to Arduino’s 3.3 V Output pin

Connect the dongle’s Tx directly to the Arduino’s Rx(Pin 0).Connect the dongle’s Rx to the Arduino’s Tx (pin 1).You can add a voltage divider to reduce the voltage going to the dongle’s Rx pin because Arduino sends 5V whereas Dongle uses only 3.3 V.It is not absolutely necessary to add a voltage divider but it is good to avoid any harm caused using the excess voltage