SparkFun Forums 

Where electronics enthusiasts find answers.

All things pertaining to wireless and RF links
By screon
#173946
Hi guys,

I just bought the Bluetooth Mate Silver so I could wire it to my Arduino Uno R3. My final purpose is to connect Arduino to my phone via BT.
I followed the tutorial for the BT modules to hook it up with Arduino, but I can't get past the first example sketches.

when I try the basic sketch, or the passthrough sketch, my code never returns true on bluetooth.available(). So I can't communicate with the bluetooth mate.
I've tried playing with the baudrates, changing Arduino IDE versions and computer settings & OS (Win 7 & Linux). But still no results.

Can anyone guide me towards a solution? Thanks in advance...

This is de sketch I am using:
Code: Select all
/*
  Example Bluetooth Serial Passthrough Sketch
 by: Jim Lindblom
 SparkFun Electronics
 date: February 26, 2013
 license: Public domain

 This example sketch converts an RN-42 bluetooth module to
 communicate at 9600 bps (from 115200), and passes any serial
 data between Serial Monitor and bluetooth module.
 */
#include <SoftwareSerial.h>  

int bluetoothTx = 2;  // TX-O pin of bluetooth mate, Arduino D2
int bluetoothRx = 3;  // RX-I pin of bluetooth mate, Arduino D3

SoftwareSerial bluetooth(bluetoothTx, bluetoothRx);

void setup()
{
  Serial.begin(9600);  // Begin the serial monitor at 9600bps

  bluetooth.begin(115200);  // The Bluetooth Mate defaults to 115200bps
  bluetooth.print("$");  // Print three times individually
  bluetooth.print("$");
  bluetooth.print("$");  // Enter command mode
  delay(100);  // Short delay, wait for the Mate to send back CMD
  bluetooth.println("U,9600,N");  // Temporarily Change the baudrate to 9600, no parity
  // 115200 can be too fast at times for NewSoftSerial to relay the data reliably
  bluetooth.begin(9600);  // Start bluetooth serial at 9600
}

void loop()
{
  if(bluetooth.available())  // If the bluetooth sent any characters
  {
    // Send any characters the bluetooth prints to the serial monitor
    Serial.print((char)bluetooth.read());  
  }
  if(Serial.available())  // If stuff was typed in the serial monitor
  {
    // Send any characters the Serial monitor prints to the bluetooth
    bluetooth.print((char)Serial.read());
  }
  // and loop forever and ever!
}
https://learn.sparkfun.com/tutorials/us ... mmand-mode