View source for Serial Port Bluetooth Module

== Introduction  ==

This module is an easy to use Bluetooth SPP (Serial Port Protocol) module, designed for transparent wireless serial connections. 

The 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 a footprint as small as 12.7mmx27mm. Hopefully it will simplify your overall design/development cycle. 

'''Model: [http://www.elecrow.com/wireless-c-78/misc-c-78_123/serial-port-bluetooth-module-masterslave-p-375.html WBT20101B]'''<BR>
[[File:Serial Port Bluetooth Module2.jpg|200px|400px]]

== Features  ==

=== Hardware features  ===

*Typical -80dBm sensitivity 
*Up to +4dBm RF transmit power 
*Low Power 1.8V Operation ,1.8 to 3.6V I/O 
*PIO control 
*UART interface with programmable baud rate 
*Integrated antenna 
*Edge connector

=== Software features  ===

*Default Baud rate: 38400, Data bits:8, Stop bit:1,Parity:No parity, Data control: yes. Supported baud rate:

9600,19200,38400,57600,115200,230400,460800. 

*Use CTS and RTS to control data stream. 
*Given a rising pulse in PIO0, device will be disconnected. 
*Status instruction port PIO1: low-disconnected, high-connected; 
*PIO10 and PIO11 can be connected to red and blue LED separately. When master and slave are paired, red

and blue led blinks 1time/2s in interval. While disconnected only blue led blinks 2times/s. 

*Auto-connects to the last device on power as default. 
*Permits pairing device to connect as default. 
*Auto-pairing PINCODE:”0000” as default 
*Auto-reconnect in 30 min when disconnected as a result of beyond the range of connection.

== Application Ideas  ==

*Remote controller 
*Wireless communication<br>

== Cautions  ==

<font color="red">
*While using with Crowduino/ Arduino, set the operation voltage to 5V. Else use a proper logic level converter. 
*While using with USBSerial Adapter, set the operation voltage to 5V 
*Command to change baud rate is persistent even after reset. Hence remember the baud rate for next use.
</font>

== Specification  ==

[[Image:Bluetooth-module-pin.JPG]] 

{| class="wikitable" border="1"
|-
! Pin 
! # 
! Pad Type 
! Description
|-
| width="100px" | PIO11 
| width="100px" | 34 
| width="350px" | Bi-Direction 
| width="450px" | Programmable input/output line
|-
| PIO10 
| 33 
| Bi-Direction 
| Programmable input/output line
|-
| PIO9 
| 32 
| Bi-Direction 
| Programmable input/output line
|-
| PIO8 
| 31 
| Bi-Direction 
| Programmable input/output line
|-
| PIO7 
| 30 
| Bi-Direction 
| Programmable input/output line
|-
| PIO6 
| 29 
| Bi-Direction 
| Programmable input/output line
|-
| PIO5 
| 28 
| Bi-Direction 
| Programmable input/output line
|-
| PIO4 
| 27 
| Bi-Direction 
| Programmable input/output line
|-
| PIO3 
| 26 
| Bi-Direction 
| Programmable input/output line
|-
| PIO32 
| 25 
| Bi-Direction 
| Programmable input/output line
|-
| PIO1 
| 24 
| Bi-Direction TX EN 
| Programmable input/output line, control output for PA(if fitted)
|-
| PIO0 
| 23 
| Bi-Direction RX EN 
| Programmable input/output line, control output for LNA(if fitted)
|-
| GND 
| 13,21,22 
| VSS 
| Ground pot
|-
| USB± 
| 15,20 
| Bi-Directional 
| 
|-
| SPI_CLK 
| 19 
| CMOS input with weak internal pull-down 
| Serial peripheral interface clock
|-
| SPI_MISO 
| 18 
| CMOS input with weak internal pull-down 
| Serial peripheral interface data Output
|-
| SPI_MOSI 
| 17 
| CMOS input with weak internal pull-down 
| Serial peripheral interface data input
|-
| SPI_CSB 
| 16 
| CMOS input with weak internal pull-up 
| Chip select for serial peripheral interface,active low
|-
| NC 
| 14 
| 
| 
|-
| 3.3VCC 
| 12 
| 3.3V 
| Integrated 3.3V(+)supply with on-chip linear regulator output within 3.15-3.3V
|-
| RESETB 
| 11 
| CMOS input with weak internal pull-up 
| Reset if low. input debouncde so must be low for&gt;5MS to cause a reset
|-
| AIO1 
| 10 
| Bi-Direction 
| Programmable input/output line
|-
| AIO0 
| 9 
| Bi-Direction 
| Programmable input/output line
|-
| PCM_SYNC 
| 8 
| Bi-Direction 
| Synchronous PCM data strobe
|-
| PCM_IN 
| 7 
| CMOS Input 
| Synchronous PCM data input
|-
| PCM_OUT 
| 6 
| CMOS output 
| Synchronous PCM data output
|-
| PCM_CLK 
| 5 
| Bi-Direction 
| Synchronous PCM data clock
|-
| UART_RTS 
| 4 
| CMOS output tri-stable with weak internal pull-up 
| UART request to send, active low
|-
| UART_CTS 
| 3 
| CMOS input with weak internal pull-down 
| UART Data input
|-
| UART_RX 
| 2 
| CMOS output,tri-stable with weak internal pull-down 
| UART Data input
|-
| UART_TX 
| 1 
| CMOS output,tri-stable with weak internal pull-up 
| UART Data output
|}

<br> 

== Software Instruction  ==

==== Working Sketch Map  ====
 
[[Image:Bluetooth-1.jpg]] 

==== Flowchat  ====
 
[[Image:Bluetooth-2.jpg]] 

==== Commands to change default configuration  ====

'''1. Set working MODE''' 

{| class="wikitable"
|-
| width="200px" | \r\n+STWMOD=0\r\n 
| width="400px" | 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), 

'''2.Set BAUDRATE''' 

{| class="wikitable"
|-
| width="200px" | \r\n+STBD=115200\r\n 
| width="400px" | Set baudrate 115200. Save and Rest.
|-
| colspan="2" | Supported baudrate: 9600, 19200,38400,57600,115200,230400,460800.
|}

'''3. Set Device NAME''' 

{| class="wikitable"
|-
| width="200px" | \r\n+STNA=abcdefg 
| width="400px" | Set device name as “abcdefg”. Save and Rest.
|}

'''4. Auto-connect the last paired device on power''' 

{| class="wikitable"
|-
| width="200px" | \r\n+STAUTO=0\r\n 
| width="400px" | Auto-connect forbidden. Save and Rest.
|-
| width="200px" | \r\n+STAUTO=1\r\n 
| width="400px" | Permit Auto-connect. Save and Rest.
|}

'''5. Permit Paired device to connect me''' 

{| class="wikitable"
|-
| width="200px" | \r\n+STOAUT=0\r\n 
| width="400px" | Forbidden. Save and Rest.
|-
| width="200px" | \r\n+STOAUT=1\r\n 
| width="400px" | Permit. Save and Rest.
|}

'''6. Set PINCODE''' 

{| class="wikitable"
|-
| width="200px" | \r\n +STPIN=2222\r\n 
| width="400px" | Set pincode “2222”, Save and Rest.
|}

'''7. Delete PINCODE(input PINCODE by MCU)''' 

{| class="wikitable"
|-
| width="200px" | \r\n+DLPIN\r\n 
| width="400px" | Delete pincode. Save and Rest.
|}

'''8. Read local ADDRESS CODE''' 

{| class="wikitable"
|-
| width="200px" | \r\n+RTADDR\r\n 
| width="400px" | 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)''' 

{| class="wikitable"
|-
| width="200px" | \r\n+LOSSRECONN=0\r\n 
| width="400px" | Forbid auto-reconnecting.
|-
| width="200px" | \r\n+LOSSRECONN=1\r\n 
| width="400px" | Permit auto-reconnecting.
|}

==== Commands for Normal Operation:  ====

'''1. Inquire''' 

{| class="wikitable"
|-
| colspan="2" width="600px" | '''a) Master'''
|-
| width="200px" | \r\n+INQ=0\r\n 
| width="400px" | Stop Inquiring
|-
| \r\n+INQ=1\r\n 
| Begin/Restart Inquiring
|-
| colspan="2" width="600px" | '''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 <span style="color:red"> red </span> and <span style="color:green">green</span> LEDS blink alternatively. 

'''2. Bluetooth module returns inquiring result''' 

{| class="wikitable"
|-
| width="250px" | \r\n+RTINQ=aa,bb,cc,dd,ee,ff;name\r\n 
| width="500px" | Serial Bluetooth device with the address “aa,bb,cc,dd,ee,ff” and the name “name” is inquired
|}

'''3. Connect device''' 

{| class="wikitable"
|-
| width="250px" | \r\n+CONN=aa,bb,cc,dd,ee,ff\r\n 
| width="500px" | Connect to a device with address of "aa,bb,cc,dd,ee,ff”
|}

'''4. Bluetooth module requests inputting PINCODE''' 

\r\n+INPIN\r\n 

'''5. Input PINCODE''' 

{| class="wikitable"
|-
| colspan="2" | \r\n+RTPIN=code\r\n
|-
| 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 <br> '''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)  
== Reference ==
[http://elasticsheep.com/2011/05/serial-bluetooth-module-slave-test/ How to Connect to Mac Laptop]<BR>
[[file:User Guide step by step.pdf]]<BR>
[[file:Demo Code for Master&Slave.zip]]