Serial port bluetooth module(Master/Slave)
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: WLS123A1M
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
Cautions
- While using with Seeeduino / Arduino, set the operation voltage to 5V. Else use a proper logic level converter.
- While using with UartSBee, set the operation voltage to 5V
- Command to change baud rate is persistent even after reset. Hence remember the baud rate for next use.
Specification
| Pin | # | Pad Type | Description |
|---|---|---|---|
| PIO11 | 34 | Bi-Direction | 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 (externally held) |
Software Instruction
Working Sketch Map
Flowchat
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),
2.Set BAUDRATE
| \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 | 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. |
6. Set PINCODE
| \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
\r\n+INPIN\r\n
5. Input PINCODE
| \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 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)
Additional Idea
Resources
-
[Software] Software instruction
-
[Datasheet] Bluetooth module Datasheet
Support
If you have questions or other better design ideas, you can go to our forum or wish to discuss.
How to buy
Click here to buy: Serial port bluetooth module (Master/Slave)
See Also
Licensing
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
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