Send sensor information to processing
Your whole sending program is a complete mess, sorry to say:

First you create a SoftwareSerial port using the HardwareSerial pins. (Why on earth would you do that?)

Then you "begin" that SoftwareSerial port.

Finally you try and print Hello through the HardwareSerial port!

Either use SoftwareSerial OR use the hardware UART. You can't mix and match both. And since you are using the hardware UART pins, why even consider using SoftwareSerial?

void setup() {
    Serial.begin(9600);
}

void loop() {
    Serial.println("Hello");
}


OR, to use other pins than 0 and 1:

#include &lt;SoftwareSerial.h&gt;

const int bluetoothTx = 2;
const int bluetoothRx = 3;

SoftwareSerial bluetooth(bluetoothTx, bluetoothRx);

void setup() {
    bluetooth.begin(9600);
}

void loop() {    
    bluetooth.println("Hello");
}