configuring HC-04 Bluetooth modem with arduino!!!!

I am using a HC-04 bluetooth modem with arduino.
The led of bt modem remains on whenever I give it +5v and GND.
The led never blinks whenever I try it to pair it with my pc bluetooth.
(I have attached the bluetooth documentation)
Is there any to check the modem is ok or not.??
Its doesn’t give any response to arduino.
I was trying to configure the HC-04 bluetooth modem by reading from this forum.;topic=101452.0

urgent help needed.!!! thank u

bluetooth.pdf (1.05 MB)

You need to say how you have wired it up. Do you get a responce from it when you send it AT commands? Have you tried swapping the TX and RX lines.

I am connecting the Rx of bluetooth modem to pin 3 of arduino Tx to pin 2.

and using the code in but that's not working i have kept the baud rate 9600

Can you post the exact code you are using as you will have had to make changes to that code to at least change the pins and what you send.

Software serial multple serial test

Receives from the hardware serial, sends to software serial.
Receives from software serial, sends to hardware serial.

The circuit:

  • RX is digital pin 10 (connect to TX of other device)
  • TX is digital pin 11 (connect to RX of other device)

Not all pins on the Mega and Mega 2560 support change interrupts,
so only the following can be used for RX:
10, 11, 12, 13, 50, 51, 52, 53, 62, 63, 64, 65, 66, 67, 68, 69

Not all pins on the Leonardo support change interrupts,
so only the following can be used for RX:
8, 9, 10, 11, 14 (MISO), 15 (SCK), 16 (MOSI).

created back in the mists of time
modified 25 May 2012
by Tom Igoe
based on Mikal Hart’s example

This example code is in the public domain.

#include <SoftwareSerial.h>

SoftwareSerial mySerial(2,3); // RX, TX

void setup()
// Open serial communications and wait for port to open:
while (!Serial) {
; // wait for serial port to connect. Needed for Leonardo only

Serial.println(“Goodnight moon!”);

// set the data rate for the SoftwareSerial port
mySerial.println(“Hello, world?”);

void loop() // run over and over
if (mySerial.available())
if (Serial.available())