wireless communications with rf 433Mhz

got set of: 433mhz rf wireless transmitter + receivers. did searching , found these tow sketches. work. instead of printing  "hello" on screen of computer connected receiver,  seems sending string of numbers like:  48 65 6c 6c 6f.  need able send short text strings. idea whats up?  i'm using 2 arduino uno's.

transmitter code:

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// transmitter code
#include <virtualwire.h>

//grove - 315(433) rf link kit demo v1.0
//by :http://www.seeedstudio.com/
//connect sent module d2 use 
#include <virtualwire.h>

int rf_tx_pin = 12;

void setup()
{
  vw_set_tx_pin(rf_tx_pin); // setup transmit pin
  vw_setup(9600); // 2000 transmission speed in bits per second.
}

void loop()
{
  const char *msg = "hello";
  vw_send((uint8_t *)msg, strlen(msg));  // send 'hello' every 400ms.
  delay(400);

}



the receiver code:

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// recever//grove - 315(433) rf link kit demo v1.0
//by :http://www.seeedstudio.com/
//connect receive module d2 use ..
#include <virtualwire.h>

int rf_rx_pin = 7;

void setup()
{
  serial.begin(9600);
  serial.println("setup");
  vw_set_rx_pin(rf_rx_pin);  // setup receive pin.
  vw_setup(2000); // transmission speed in bits per second.
  vw_rx_start(); // start pll receiver.
}

void loop()
{
  uint8_t buf[vw_max_message_len];
  uint8_t buflen = vw_max_message_len;
  if(vw_get_message(buf, &buflen)) // non-blocking i/o
  {
    int i;
    // message checksum received, dump hex
    serial.print("got: ");
    for(i = 0; < buflen; ++i)
    {
      serial.print(buf[i], hex);
      serial.print(" ");
  //serial.print(buf[i]);
    }
    serial.println("");
  }
}


change:-

code: [select]

serial.print(buf[i], hex);
to

code: [select]

serial.write(buf[i]);

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