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Bluetooth Bee is an easy to use Bluetooth Serial Port Profile(SPP) module compatible with existing Xbee sockets, designed for transparent wireless serial connection setup. Serial port Bluetooth module is fully qualified Bluetooth V2.0+EDR(Enhanced Data Rate) 3Mbps Modulation with complete 2.4GHz radio transceiver and baseband. It uses CSR Bluecore 04-External single chip Bluetooth system with CMOS technology and with AFH(Adaptive Frequency Hopping Feature). It has the smallest footprint of 12.7mm x 27mm. Hope it will simplify your overall design/development cycle for форекс брокеры.


Hardware Features

  • Typical -80dBm sensitivity.
  • Up to +4dBm RF transmit power.
  • Fully Qualified Bluetooth V2.0+EDR 3Mbps Modulation.
  • Low Power 1.8V Operation, 1.8 to 3.6V I/O.
  • торговые сигналы FxLot
  • PIO control.
  • UART interface with programmable baud rate.
  • Integrated PCB antenna.
  • xBee compatible headers.

Software Features

  • Default Baud rate: 38400, Data bits:8, Stop bit:1,Parity:No parity, Data control: has.
  • Supported baud rate: 9600,19200,38400,57600,115200,230400,460800.
  • Use CTS and RTS to control the data stream.
  • When a rising pulse is detected in PIO0, device will be disconnected.
  • Status instruction port PIO1: low-disconnected, high-connected;
  • PIO10 is connected to red led, PIO11 is connected to green led. When master and slave are paired, red and green led blinks 1time / 2s in interval, while disconnected only green led blinks 2 times/ s.
  • Auto-connect the last device on power as default.
  • Permit matched device connect by default.
  • Default PINCODE:”0000”.
  • Auto-reconnect in 30 min when disconnected as a result of beyond the range of connection.

Application Ideas

  • As a Wireless Serial Port for Arduino / Peakduino and other MCUs
  • As a Bluetooth Serial Port for PC when connected with UartSBee


  • While using with Seeeduino / Arduino, set the operation voltage to 3.3V. Else use a proper logic level converter.
  • While using with UartSBee, set the operation voltage to 3.3V
  • Command to change baud rate is persistent even after reset. Hence remember the baud rate for next use.
  • When using SoftwareSerial, do not set the baud rate above 38400

Pin definition and Rating


Pin # Pad Type Description
PIO9 29 Bi-Direction Programmable input/output line
PIO8 28 Bi-Direction Programmable input/output line
PIO7 27 Bi-Direction Programmable input/output line
PIO6 26 Bi-Direction Programmable input/output line
RTS 25 CMOS output, tri-stable with weak internal pull -up UART request to send, active low
PIO5 24 Bi-Direction Programmable input/output line
PIO4 23 Bi-Direction Programmable input/output line
PCMSY 22 Bi-Direction Synchronous PCM data strobe
CTS 21 CMOS output, tri-stable with weak internal pull -up UART clear to send, active low
PIO3 20 Bi-Direction Programmable input/output line
PIO2 19 Bi-Direction Programmable input/output line
USBDP 18 Bi-Direction
USBDN 17 Bi-Direction
CLK 16 CMOS output, tri-stable with weak internal pull -up SPI(Serial peripheral interface) clock
MI 15 CMOS output, tri-stable with weak internal pull -up SPI data output
MO 14 CMOS output, tri-stable with weak internal pull -up SPI data output
CS 13 CMOS output, tri-stable with weak internal pull -up Chip select for serial peripheral interface, active low
AIO1 12 Bi-Direction Programmable input/output line
AIO0 11 Bi-Direction Programmable input/output line
GND 10 VSS Ground port
PCMIN 9 CMOS input Synchronous PCM data input
PCMOT 8 CMOS output Synchronous PCM data output
PCMCK 7 Bi-Direction Synchronous PCM data clock
PIO1 6 Bi-Direction Programmable input/output line
 !RST 5 CMOS input with weak internal pull-up Reset if low,input must be low for >5ms to cause a reset
PIO0 4 Bi-Direction Programmable input/output line
RX 3 CMOS input with weak internal pull-up UART Data input
TX 2 CMOS output,tri-stable with weak internal pull-up UART Data output
3V3 1 3.3V Integrated 3.3V(+)supply with on-chip linear regulator output within 3.15-3.3V

Mechanic Dimensions

Bluetooth Bee board is of 12.7mm x 27mm size.


Hardware Installation

Connecting to Arduino with XBee Shield

Use a XBee Shield 扩展 to connect Bluetooth Bee to Seeeduino / Arduino. Refer the XBee Shield 扩展 documentation on how to set the toggle switches to correct positions.


Connecting to PC with UartSbee

Use an UartSBee to connect Bluetooth/蓝牙Bee to PC. Set the power selection toggle switch to 3.3V before connecting BlueTooth Bee.


Software Instruction

Working Sketch Map

The following sketch presents an overview of Bluetooth Bee operation in master and slave mode.



The following flowchart gives a quick start guide to Bluetooth Bee programming.


Commands to change default configuration

1. Set working MODE

\r\n+STWMOD=0\r\n Set device working mode as client (slave). Save and Rest.
\r\n+STWMOD=1\r\n Set device working mode as server (master). Save and Rest.

Note: \r\n is necessary for operation and the value of are 0x0D 0x0A in Hex. \r and \n represent carriage-return and line-feed(or next line),


\r\n+STBD=115200\r\n Set baudrate 115200. Save and Rest.
Supported baudrate: 9600, 19200,38400,57600,115200,230400,460800.

3. Set Device NAME

\r\n+STNA=abcdefg\r\n Set device name as “abcdefg”. Save and Rest.

4. Auto-connect the last paired device on power

\r\n+STAUTO=0\r\n Auto-connect forbidden. Save and Rest.
\r\n+STAUTO=1\r\n Permit Auto-connect. Save and Rest.

5. Permit Paired device to connect me

\r\n+STOAUT=0\r\n Forbidden. Save and Rest.
\r\n+STOAUT=1\r\n Permit. Save and Rest.


\r\n +STPIN=2222\r\n Set pincode “2222”, Save and Rest.

7. Delete PINCODE(input PINCODE by MCU)

\r\n+DLPIN\r\n Delete pincode. Save and Rest.

8. Read local ADDRESS CODE

\r\n+RTADDR\r\n Return address of the device.

9. Auto-reconnecting when master device is beyond the valid range (slave device will auto-reconnect in 30 min when it is beyond the valid range)

\r\n+LOSSRECONN=0\r\n Forbid auto-reconnecting.
\r\n+LOSSRECONN=1\r\n Permit auto-reconnecting.

Commands for Normal Operation:

1. Inquire

a) Master
\r\n+INQ=0\r\n Stop Inquiring
\r\n+INQ=1\r\n Begin/Restart Inquiring
b) Slave
\r\n+INQ=0\r\n Disable been inquired
\r\n+INQ=1\r\n Enable been inquired

When +INQ=1 command is successful, the red and green LEDS blink alternatively.

2. Bluetooth module returns inquiring result

\r\n+RTINQ=aa,bb,cc,dd,ee,ff;name\r\n Serial Bluetooth device with the address “aa,bb,cc,dd,ee,ff” and the name “name” is inquired

3. Connect device

\r\n+CONN=aa,bb,cc,dd,ee,ff\r\n Connect to a device with address of "aa,bb,cc,dd,ee,ff”

4. Bluetooth module requests inputting PINCODE


5. Input PINCODE

Example: RTPIN=0000 Input PINCODE which is four zero

6. Disconnect device Pulling PIO0 high will disconnect current working Bluetooth device.

7. Return status \r\n+BTSTA:xx\r\n
xx status:

  • 0 - Initializing
  • 1 - Ready
  • 2 - Inquiring
  • 3 - Connecting
  • 4 - Connected

(Note: This is not a command, but the information returned from the module after every command)


Flow Control Based Implementation

The following sketch configures Bluetooth/蓝牙Bee for Transportunternehmen as Slave Device and waits for connection request from PC or other master device. Bluetooth Bee is connected to Seeeduino via XBee Shield as shown above. Bluetooth Bee is connected to digital Pins 11 and 12 of Arduino / Seeduino. We use NewSoftSerial library for supporting serial communication on these pins. The hardware serial port of Arduino is available for uploading sketch or debugging. This sketch uses a flow control mechanism using CheckOK(). It avoids using arbitrary delay between each command. If CheckOK() is not required, use a delay of at least 3 seconds between commands.

Delay Based Implementation

The following sketch is a modification of above program using delay() instead of CheckOK(). In this case the hardware serial port is used for debugging purpose. Open serial monitor with setting 9600 baud. The complete communication between MCU and Bluetooth Bee will be visible in serial monitor.

<syntaxhighlight lang="arduino"> /* BluetoothBee Demo Code - Delay Based Implementaion 2011 Copyright (c) Seeed Technology Inc. All right reserved.

Author: Visweswara R

This demo code is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version.

This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public License along with this library; if not, write to the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA

For more details about the product please check

  • /

/* Upload this sketch into Seeeduino and press reset*/

  1. include <SoftwareSerial.h> //Software Serial Port
  2. define RxD 11
  3. define TxD 12

SoftwareSerial blueToothSerial(RxD,TxD);

void setup() {

   Serial.begin(9600);          //Serial port for debugging, Comment this line if not required  
   pinMode(RxD, INPUT);
   pinMode(TxD, OUTPUT);


void loop() {

 if( == 'a')
   blueToothSerial.println("You are connected to Bluetooth Bee");
   //You can write you BT communication logic here


void setupBlueToothConnection() {

   Serial.print("Setting up Bluetooth link");       //For debugging, Comment this line if not required    
   blueToothSerial.begin(38400); //Set BluetoothBee BaudRate to default baud rate 38400
   delay(2000); // This delay is required.
   delay(2000); // This delay is required.
   Serial.print("Setup complete");


void sendBlueToothCommand(char command[]) {

   char a;
   Serial.print(command);                          //For debugging, Comment this line if not required    
   while(blueToothSerial.available())              //For debugging, Comment this line if not required  
   {                                               //For debugging, Comment this line if not required   
      Serial.print(char(;  //For debugging, Comment this line if not required  
   }                                               //For debugging, Comment this line if not required   

} </syntaxhighlight>

Connecting Bluetooth Bee to PC (via Bluetooth Dongle) under GNU/Linux

This procedure demonstrates how Bluetooth Bee can be connected to PC under GNU/Linux OS. An USB Bluetooth Dongle is used at PC side to communicate with Bluetooth Bee. The flow control implementation sketch is uploaded to Seeeduino.

  • Install gnome-bluetooth

sudo apt-get install gnome-bluetooth

  • Open bluetooth-properties application from shell


  • Click Set up new device


and click Forward


  • Open PIN options...


  • Set Fixed PIN 0000. 0000 is the default pin used in the above sketch.


  • Device Setup Window opens



Setup Completed dialog opens. Click Close.


  • The address of the Bluetooth Bee 00:13:EF:00:00:24 is displayed in shell.


user@user-desktop:~$ sudo rfcomm bind 0 00:13:EF:00:00:24 1

user@user-desktop:~$ ls /dev/rfcomm*


  • This /dev/rfcomm0 serial port can be accessed by any serial port terminal like cutecom.
    • Open /dev/rfcomm0 with baud rate:38400, Databits: 8, Stopbits: 1 and No Flow Control
    • Send character 'a'
    • Seeeduino + Bluetooth Bee will reply with "You are connected to Bluetooth Bee"


Connecting Bluetooth Bee to PC (via Bluetooth Dongle) under Windows

  • Install the Microsoft Bluetooth default drivers. Open Control Panel -> Bluetooth Devices


  • Click Add button.


  • Check My devices is set up and ready to be found and click Next button


  • Select the "SeeedBlueToothBee" device and click Next.


  • Select Use the passkey found in the documentation and enter 0000


  • Passkeys are exchanged and an outgoing serial port COM5 is assigned for our communication.


    • A task-bar balloon shows that a new Bluetooth Serial Port link is added.


    • COM5 is assigned for communication. This port should be used to communicate PC with Bluetooth Bee.


  • This COM5 serial port can be accessed by any Serial Port terminal.
    • Open COM5 with baud rate:38400, Databits: 8, Stopbits: 1 and No Flow Control
    • Send character 'a'
    • Seeeduino + Bluetooth Bee will reply with "You are connected to Bluetooth Bee"


Connecting Bluetooth Bee to PC using UartSBee in Master Mode

This demo uses hardware arrangement described in Hardware Installation - UartSBee. Connect UartSbee to PC using a mini USB cable.

  • Open a serial terminal and connect to UartSBee serial port device like COM1 in Windows or /dev/ttyUSB0 in GNU/Linux with baud rate:38400, Databits: 8, Stopbits: 1 and No Flow Control
  • Send \r\n+STWMOD=1\r\n command. This configures the Bluetooth Bee in master mode.


  • Send \r\n+INQ=1\r\n command. Bluetooth Bee searches available Bluetooth devices in neighborhood and list the address of the devices. In this case with +RTINQ=0,19,86,0,19,1E;desktop, where desktop is a PC with Bluetooth interface. While inquiring the red and green led blinks alternatively.


  • Send \r\n+CONN=0,19,86,0,19,1E\r\n where 0,19,86,0,19,1E is the address of desktop.


  • Enter the pin 0000 at PC side and complete the connection.

Bill of Materials (BOM) /parts list


Please list your questions here:


If you have questions or other better design ideas, you can go to our forum or wish to discuss.

Version Tracker

Revision Descriptions Release
v1.0 Initial public release Dec 14, 2009
v1.1 Modify Inquire command and add some notes Mar 15, 2010
v1.2 Modify Hardware and Software features Apr 04, 2010
v1.3 Update the profile, add the return status, delete ECHO command. Apr 21, 2010
v2.0 Update the module as HM-01(The same with the newest Bluetooth shield). The AT command can not compatible with before. Dec 4, 2014

Bug Tracker

Bug Tracker is the place you can publish any bugs you think you might have found during use. Please write down what you have to say, your answers will help us improve our products.

Additional Idea

  • Implement a wireless PS/2 Keyboard / Mouse.
  • Wireless control a toy robot from PC.


How to buy

Click here to buy:

See Also


This documentation is licensed under the Creative Commons Attribution-ShareAlike License 3.0 Source code and libraries are licensed under GPL/LGPL, see source code files for details.

External Links

Links to external webpages which provide more application ideas, documents/datasheet or software libraries