ZBA, Inc. ZBA Bluetooth 2.0 Module with on board antenna. Assembly No. BC04-191 ZBA, Inc 94 Old Camplain Road, Hillsborough, NJ 08844 www.zbausa.com ZBA, Inc.
"Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment."
"This device complies with Part 15 of the FCC rules. Operations is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) This device must accept any interference received, including interference that may cause undesired operation."
"This equipment complies with FCC radiation exposure limits set forth for an unctrolled environment. End users must follow the specific operating instructions for satisfying RF exposure compliance. To maintain compliance with FCC RF exposure compliance requirements, please follow operation instruction as documented in this manual. "
"The final end product must be labeled in a visible area with the following: Contains FCC ID:
VMTZBA-BT44."
"The end user manual shall include all required regulatory information/warning as show in this manual."
Table of Contents ZBA, Inc. 8 8.1 8.2 7.4.1 7.4.2 7.4.3 1 Document Status .............................................................................................................. 4 2 Scope................................................................................................................................ 5 3 Bluetooth Assembly Description: .................................................................................... 5 4 Features ............................................................................................................................ 5 5 Applications ..................................................................................................................... 6 6 Block Diagram ................................................................................................................. 6 Specifications ................................................................................................................... 7 7 7.1 Pin Configurations & Dimensions ........................................................................... 7 7.2 Dimensional drawing ............................................................................................... 9 7.3 General Specifications ........................................................................................... 10 Electrical Characteristics ....................................................................................... 10 7.4 Absolute Maximum Ratings .......................................................................... 10 Radio Characteristics ..................................................................................... 10 Power Consumption....................................................................................... 13 7.4.3.1 Current measurements on the BC04-191 ................................................ 13 7.4.3.2 Datasheet specification of the BC04 External Module .............................. 13 Serial Port Profile........................................................................................................... 14 Default Configuration ............................................................................................ 14 Configuration Command Set-up & Procedures ..................................................... 14 Entering the Set-up Mode .............................................................................. 15 8.2.1 Testing the Communication Link .................................................................. 15 8.2.2 Command list ................................................................................................. 15 8.2.3 Set RS232 Baud Rate (bps)............................................................................ 15 8.2.4 Set/inquired UART Parameters ..................................................................... 16 8.2.5 Set Authentication.......................................................................................... 16 8.2.6 Set Password .................................................................................................. 16 8.2.7 Set Device Name............................................................................................ 17 8.2.8 Set Device Type ............................................................................................. 17 8.2.9 8.2.10 Set Master/Slave Mode .................................................................................. 17 8.2.11 Clear Paired Device Address ......................................................................... 18 8.2.12 Set Sniff Power Saving Mode........................................................................ 18 8.2.13 Set Sniff Power Saving ModeExtended..................................................... 18 8.2.14 Reset to Factory Default ................................................................................ 18 Set/Inquire Scan Time.................................................................................... 18 8.2.15 Set/Inquire Paired Device .............................................................................. 19 8.2.16 8.2.17 Inquire Version .............................................................................................. 19 Inquired remote device Address ................................................................... 19 8.2.18 Set/Inquired Paired Device Address .............................................................. 20 8.2.19 8.2.20 Inquired Device BD Address ......................................................................... 20 Software Reset ............................................................................................... 20 8.2.21 Set/Inquire about Low power mode............................................................... 20 8.2.22 Set/ Inquire about Data processing mode in the condition of disconnecting. 21 8.2.23 8.2.24 Set/ Inquire about Flow control mode ........................................................... 21 Exiting the Set-up Mode ............................................................................... 21 8.2.25 9 9.1 Low power modes.......................................................................................................... 21 Park & Sniff ........................................................................................................... 21 10 Mounting recommendations ...................................................................................... 23 11 Ordering Information ................................................................................................. 24 ZBA, Inc. List of Figures Figure 1 Block Diagram of the BT Module ............................................................................. 6 Figure 2 Top and Side View of module indicating the Pin directions .................................... 7 Figure 3 Input circuit of Module power control (pin10).......................................................... 8 Figure 4 Dimensional drawing of the BC04-191 .................................................................. 9 Figure 5 Cross-section of recommended mounting of the BT module................................. 23 Figure 6 Bottom View of PCB indicating where there shouldd be NO Ground Plane ........ 23 Disclaimer:
No part of this document may be copied or reproduced in any form or by any means, or transferred to any third party, without the prior written consent of an authorized representative of ZBA, Inc. (ZBA). The information in this document is subject to change without notice. ZBA assumes no responsibility for any errors or omissions that may appear in this document, and disclaims responsibility for any consequences resulting from the use of the information set forth herein. ZBA makes no commitments to update or to keep current information contained in this document. The products listed in this document are not suitable for use in applications such as, but not limited to, aircraft control systems, aerospace equipment, submarine cables, nuclear reactor control systems and life support systems. Moreover, ZBA does not recommend or approve the use of any of its products in life support devices or systems or in any application where failure could result in injury or death. If a customer wishes to use ZBA products in applications not intended by ZBA, said customer must contact an authorized ZBA representative to determine ZBAs willingness to support a given application. The information set forth in this document does not convey any license under the copyrights, patent rights, trademarks or other intellectual property rights claimed and owned by owned by ZBA. The information set forth in this document is considered to be Proprietary and Confidential property ALL PRODUCTS SOLD BY ZBA ARE COVERED BY THE PROVISIONS APPEARING IN ZBAS TERMS AND CONDITIONS OF SALE ONLY, INCLUDING THE LIMITATIONS OF LIABILITY, WARRANTY AND INFRINGEMENT PROVISIONS. ZBA MAKES NO WARRANTIES OF ANY KIND, EXPRESS, STATUTORY, IMPLIED OR OTHERWISE, REGARDING INFORMATION SET FORTH HEREIN OR REGARDING THE FREEDOM OF THE DESCRIBED PRODUCTS FROM INTELLECTUAL PROPERTY INFRINGEMENT, AND EXPRESSLY DISCLAIMS ANY SUCH WARRANTIES INCLUDING WITHOUT LIMITATION ANY EXPRESS, STATUTORY OR IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. ZBA, Inc. 1 Document Status Date June 6, 2006 April 2007 June 2007 August 2007 First draft Add AT command set http://www.bluetoothmodules.net publication Update current measurements Comments To make a request for change, correction, additions or information on references, please contact:
ZBA, Inc. 94 Old Camplain Road Hillsborough, NJ 08844 Phone: 908-359-2070 Fax 908-359-1272 E-mail: bluetoothsupport@zbausa.com Website : http://www.bluetoothmodules.net ZBA, Inc. 2 Scope The intention of this specification is to provide general guidelines on the integration of the BC04-191 Bluetooth assembly. This product, which complies with Bluetooth Specification 12.0, is designed to help companies offer Bluetooth enabled products by speeding their development processes with a ready to integrate Bluetooth assembly with external antenna attachment. 3 Bluetooth Assembly Description:
The BC04-191 is a general purpose Bluetooth module incorporating an on-board meandering line antenna designed to be incorporated into an end product. The BC04-
191 Bluetooth Module is a Class 2 Bluetooth module using BlueCore4-External chipset from Cambridge Silicon Radio, a leading Bluetooth chipset supplier. It provides a fully compliant Bluetooth system for data and voice communications. The module and device firmware is fully compliant with the Bluetooth specification V2.0. The Bluetooth assembly is available in two different variants:
1) UART transport with serial port emulation (Serial Port Profile) 2) UART transport with HCI interface (only upon special request) 4 Features
Operating Frequency Band 2.40 GHz~2.48GHz unlicensed ISM Band
Class 2 type Output Power
RF Shielding can constructed of non-ferrous metals.
Support Firmware Upgrade (via The UART)
12 pin 2mm board to board connector (top or bottom connections )
Active Bluetooth Connections signal
Built-in Power control for turning off the Module
Support Piconet, up to 7 Slaves
Scatternet Support
PCM Audio Interface
Low Voltage Power Supply, 2.7V to 3.6V
Built-in 8Mbit Flash Memory
Low Power Modes Available: Park, Sniff, Hold and Deep Sleep
Dimensions: 30mm X 17.5mm X 3.15 mm
Development board available. ZBA, Inc. 5 Applications
PCs, PDAs
Computer Accessories (CF Cards, USB Dongles
PCMCIA, RS232 Adaptors, etc.)
Mice, Keyboard, Joysticks
Cordless Phone
Digital Camera
Access Points to LAN and/or Dial-up network FAX, Printer Adaptors 6 Block Diagram Figure 1 Block Diagram of the BT Module 7 Specifications 7.1 Pin Configurations & Dimensions ZBA, Inc. Pin-out 12 pin 2mm dual row connector (SAMTEC CLT106-02-L-D or equiv.) Pin 1 = Vcc (3.3 Volts regulated) Pin 2 = GND Pin 3 = RxD Pin 4 = TxD Pin 5 = CTS Pin 6 = RTS Pin 7 = GND Zero (0) ohm Jumper internal to module to GND Pin 8 = Reserved (connected to PIO for future use) Pin 9 = NCONN Output from module indicating the module is connected (lo = connected) Pin 10 = NPWR - PFET-gate w/10K resistor to GND. (Module is powered-on if left floating) Pin 11 = Reserved (connected to PIO for future use) Pin 12 = Reserved (connected to PIO for future use) 2) Pin outline:
Can-non ferrous connector 12 10 8 11 9 7 5 Top view 6 4 2 Antenna 3 1 Side view Holes in PCB to connector Note: The PCB board has 12 holes to accommodate connecting the module via 2mm dual row pins through the PCB from the bottom. Figure 2 Top and Side View of module indicating the Pin directions ZBA, Inc. 3) Input Circuit of Pin 10 From Pin 10K From VCC Pin 1 Low impedance P-FET 3.3 volt supply to module Figure 3 Input circuit of Module power control (pin10) 7.2 Dimensional drawing ZBA, Inc. 1.8 mm 2.0 mm 30mm 1.8mm x 2 1.8 mm 2.0 mm 17.5mm 2.5mm 1.0mm Figure 4 Dimensional drawing of the BC04-191 ZBA, Inc. 7.3 General Specifications Item Carrier Frequency Modulation Channel Intervals Number of Channels Frequency Hopping Receive Sensitivity Transmission Power Output Interface Power Supply Operating Temperature Range Storage Temperature Range Dimensions Antenna Specification 2400MHz to 2483.5MHz GFSK, 1Mbps, 0.5BT Gaussian 1MHz 79 1600hops/sec, 1MHz channel space
-82 dBm typ. @0.1% BER
+4dBm max. Full speed UART, 3.3V 10%
-20C to 85C
-40C to 85C 30mm X 17mm X 3.15 mm Ceramic 7.4 Electrical Characteristics 7.4.1 Absolute Maximum Ratings Absolute maximum ratings for supply voltage and voltages on digital and analogue pins of the Module are listed below; exceeding these values will cause permanent damage Voltage Voltage Range -Power Pins Voltage Range Digital Pins Storage Conditions Storage Temperature Storage Humidity Operating Conditions Temperature Range Peak Power supply current
-40C to 150C (ambient) 0-90% RH
-20C< TA<95C 75 mA 2.7 to 3.6V
-0.3V to 3.6V 7.4.2 Radio Characteristics Receiver Sensitivity at 0.1%
Temperature = -20C Frequency
(GHz) 2.402 Min
Typ
-84 Max
-80 Bluetooth Specification
-70 Unit dBm ZBA, Inc. BER
-20 Bluetooth Specification
-6 to +4 (3) 2.441 2.480 Maximum received signal at 0.1%
BER Transmitter Frequency
(GHz)
0 Min
-84
-84 10 Typ
-80
-80
Max RF transmit power
(1)(2) 2.402 2.441 2.480 0 0 0
2.5 2.5 2.5 35 1.8 4 4 4
800 1000 16
RF power control range RF power range control resolution 20 dB bandwidth for modulated carrier Initial carrier frequency tolerance Drift Drift Rate f1avg "Maximum Modulation"
f2avg "Minimum Modulation"
Notes
(1) BlueCore4 firmware maintains the transmit power to be within the FCC Limits
(2) Measurement made using a PSKEY_LC_MAX_TX_POWER setting corresponds to a PSKEY_LC_POWER_TABLE power table entry of 63. 25 15 20 165 150 75 25 400 140<f1avg <175
115 dBm dBm dBm Unit dBm dBm dBm dB dB KHz KHz KHz Hz/s KHz KHz Temperature = +20C Receiver Sensitivity at 0.1%
BER Frequency
(GHz) 2.402 2.441 2.480 Maximum received signal at 0.1%
BER Transmitter Frequency
(GHz) Min
0 Min Typ
-82
-84
-84
Typ Max
-80
-80
-80
Max Bluetooth Specification
-70 Unit dBm dBm dBm
-20 Bluetooth Specification dBm Unit RF transmit power 2.402 2.441 2.480 RF power control range RF power range control resolution 20 dB bandwidth for modulated carrier Initial carrier frequency tolerance Drift Drift Rate f1avg "Maximum Modulation"
f2avg "Minimum Modulation"
C/I co-channel Adjacent channel selectivity C/I f=f0 1MHz Adjacent channel selectivity C/I f=f0 2MHz Adjacent channel selectivity C/I f f0+3MHz Adjacent channel selectivity C/I f f0-
3MHz Adjacent channel selectivity C/I f=fimage Adjacent channel transmit power f=f02MHz Adjacent channel transmit power f=f03MHz Maximum received signal at 0.1%
BER Transmitter Frequency
(GHz) RF transmit power 2.402 2.441 2.480 RF power control range RF power range control resolution 20 dB bandwidth for modulated carrier 0 0 0
0 Min 0 0 0
2.5 2.5 2.5 35 1.8 800 25 15 20 165 150 10
-4
-35
-45
-45
-18
-35
-35
Typ 1 1 1 35 1.8 800 ZBA, Inc.
-6 to +4 16
1000 75 25 400 140<f1avg <175 115 11 0
-30
-40
-40
-9
-20
-40
-20 Bluetooth Specification
-6 to +4 16
1000 dBm dBm dBm dB dB kHz kHz kHz Hz/s kHz kHz dB dB dB dB dB dB dBc dBc dBm Unit dBm dBm dBm dB dB kHz 4 4 4
11 0
-30
-9
-20
-40
Max 4 4 4
Initial carrier frequency tolerance Drift Drift Rate f1avg "Maximum Modulation"
f2avg "Minimum Modulation"
25 15 20 165 150
7.4.3 Power Consumption 7.4.3.1 Current measurements on the BC04-191 ZBA, Inc. 75 kHz 25 kHz 400 Hz/s kHz kHz 115 140<f1avg <175 Description Ipd Idis I conn-ps I conn-t I conn-r Value 300 24 1.32 24 23.5 Units Comments uA Power down- NPWR= hi, Mode: not connectable mA Mode Discovery & connecting, Average mA mA mA current Connected, Mode park & sniff, no data transmitted, No LED indicator (Nconn= hi) Connected Mode= Slave, transmitting data Comm = 9600,N,8,1 Connected: Mode= Slave; Receiving data Comm = 9600,N,8,1 Note 1: For measurement above the distance between the master and slave = 1 meter 7.4.3.2 Datasheet specification of the BC04 External Module Operation Mode Page scan Inquiry and page scan ACL No traffic ACL With file transfer ACL No traffic ACL With file transfer ACL 40ms sniff ACL 1.28s sniff SCO HV1 Connection Type
Master Master Slave Slave Master Master Master UART Rate Average Unit
(kbps) 115.2 115.2 115.2 115.2 115.2 115.2 38.4 38.4 38.4
- 0.42 0.76 4.60 10.3 17.0 24.7 2.40 0.37 39.2 mA mA mA mA mA mA mA mA mA SCO HV3 SCO HV3 30ms sniff ACL 40ms sniff ACL 1.28s sniff Parked 1.28s beacon SCO HV1 SCO HV3 SCO HV3 30ms sniff Standby Host connection(a) Reset (RESETB low)(a) Master Master Slave Slave Slave Slave Slave Slave
38.4 38.4 38.4 38.4 38.4 38.4 38.4 38.4 38.4
20.3 19.8 2.11 0.42 0.20 39.1 24.8 19.0 40 34 ZBA, Inc. mA mA mA mA mA mA mA mA uA uA
(a) Low power mode on the linear regulator is entered and exited automatically when the chip enters/leaves Deep Sleep mode . 8 Serial Port Profile When shipped with the on-board Serial Port Profile (SPP), the modules firmware emulates the function of a serial port. When connected to the host microprocessor via the UART transport, the module appears as a COM port. This makes it easy for designers to write software to utilize Bluetooth wireless communication. The SPP profile embedded within the module provides a menu for making configuration changes utilizing AT commands described below in section 8.2:
8.1 Default Configuration UART Baud Rate: 9600 baud Number of Bits: 8 Stop bit: One Parity: None H/W Flow Control: Disable PIN: 1111 Device Name: ZBA-SPP Mode: Slave Sleep Mode: Deep sleep when ever possible. Partner pairing is dropped at power off or un-pairing by master. 8.2 Configuration Command Set-up & Procedures PC interface: If you wish to connect the module to a PCs comm. port it is necessary to include a level shifter between the module and the PC. A recommended interface IC would be the MAX3232 RS232 driver IC (or equiv.) and a 3.3 Volt voltage regulator. ZBA, Inc. Please contact ZBA for details on purchasing a development board to interface the module to the PC. Microcontroller Interface: The UART of the Bluetooth module can directly connect to the microprocessors UART. The Microprocessor must have an I/O that will operate from 0 to 3.3 Volts or the appropriate level shifter circuitry must be used as to not overstress the I/O of either device. Please note. The modules will only response the host set-up commands after the module has entered the command mode. For module to enter in the command mode, the host must send a single character ESC <0x1b> within 5 second after the unit has been powered on. If the ESC character is not sent within the specified 5 second window then the module will automatically enter the SPP mode and any information sent to the UART will be treated as data to be transmitted over a Bluetooth link. Note: All Commands except the first <ESC> command contain a suffix of <CR><LF>. 8.2.1 Entering the Set-up Mode Command Response
<CR>
OPEN:num<CR><LF>
ESC Parameter Num= 0: device is not paired Num= 1 Device is currently paired 8.2.2 Testing the Communication Link Command Response Parameter AT OK None 8.2.3 Command list Command Response List of Commands ATZ?
Parameter None 8.2.4 Set RS232 Baud Rate (bps) Response Command Parameter AT+BAUD= <Para1>
OK AT+BAUD?
OK
+BAUD <para1>
Note: The default baud rate is 9600bps ZBA, Inc. Para1 = 1200, 2400, 4800, 9600, 19200, 38400, 57600, 115200, 230400 8.2.5 Set/inquired UART Parameters Command Response AT+UARTMODE=<Para1>,<Para2> OK OK AT+ UARTMODE?
UARTMODE <Para1>,<Para2>
Parameter
<Para1>= Stop-
bit
<Para1>
0 = 1 Stop bit 1 = 2 Stop bits
<Para2> Parity-
bit 0 = None 1 = ODD 2 = EVEN Note: the default UARTMODE parameters are N, 8, 1 and the overall comm. Default Parameters are 9600,N,8,1 8.2.6 Set Authentication Command AT+AUTH=<Para1>
Response OK AT+AUTH?
OK AUTH<Para1>
Parameter Para1 =
Authentication 0 = disable 1= enable Authentication enabled Note: The default authentication mode is Authentication enabled. 8.2.7 Set Password Command AT+PASSWORD=
< Para1>
Response Parameter Para1 Password OK ZBA, Inc. Default = 1111 AT+PASSWORD?
OK
+PASSWORD: < Para1>
Note: The default authentication password = 1111 8.2.8 Set Device Name Command Response AT+NAME= < Para1>
OK AT+NAME?
OK
+NAME <Para1>
Note: The default Device name = ZBA-SPP. 8.2.9 Set Device Type Command AT+CLASS=< Para1>
OK Response AT+CLASS?
OK CLASS<Para1>
8.2.10 Set Master/Slave Mode Command AT+ROLE=< Para1>
OK Response Parameter Para1= Device name Default= ZBA-SPP Parameter Para1 Device type (Length must = 6 characters) default = 000000 Parameter Para1 Slave = 0, Master = 1 Default = 0, Slave AT+ROLE?
OK ROLE <Para1>
Note:1 The default mode is Slave. Note2: While in Master Mode the module will respond with
+INQRES: remote BTADDR for each of the Bluetooth devices that are in the neighbourhood To connect to a particular device you will need to type AT+RADDR= BT address (the specific device you wish to pair determined from the AT+INQ? Command). Command AT+CLEARADDR OK Response None ZBA, Inc. 8.2.11 Parameter Clear Pa Note: This command will clear any remote device address that the module has been paired to. 8.2.12 Command Set Sniff Power Saving Mode Response AT+SNIFF=<Para1>,<Para2>,
<Para3>,<Para4>
AT+SNIFF?
OK OK
+SNIFF<Para1>,<Para2>,
<Para3>,<Para4>
Parameter Para1 Maximum Para2 Minimum Para3 test Para4 Over time Default = 1024.512,1024,512 number in decimal mode 8.2.13 Set Sniff Power Saving ModeExtended Command Response AT+SNIFFEX=<Para1>,<Para2>,
<Para3>,<Para4>
AT+SNIFFEX?
OK OK SNIFF<Para1>,<Para2>,
<Para3>,<Para4>
Parameter Para1 Maximum Para2 Minimum Para3 test Para4 Over time Para5 Sniff timeout Default = 1024.512,1024,512,10 number in decimal mode 8.2.14 Command AT+RESET Reset to Factory Default Response OK Parameter None 8.2.15 Set/Inquire Scan Time Command AT+SCANTIME=<Para1>,<Para2>,
<Para3>,<Para4>
OK Response Parameter Para1= Scan interval time Para2=Scan time-out Para3=Inquiry interv a ZBA, Inc. Para4=Inquiry time-
out AT+SCANTIME?
OK
+SCAN<Para1>,<Para2>,
<Para3>,<Para4>
Note: The default Value (in decimal = N* 625 us) Para1= 2048, Para1= 18, Para1= 2048, Para1= 18, 8.2.16 Set/Inquire Paired Device Command AT+BIND=
< Para1>
AT+BIND?
Response OK OK
+BIND<Para1>
Parameter Para1 0 =Always paired 1 = Drop pair Default=1 Drop pairing Note: The default mode is to drop pair. The drop pair function occurs when the module is power-off then back on or the master drops pairing. This will allow another master to commence a discovery process and connect to the module (slave) device. If the device is set-up as always paired then the module will only communicate with the specific master whose address it has been bonded to even after power off and power-on. This mode is useful for application where a cable replacement function is the required. To communicate to a different master the module must have the bonded address cleared. This is accomplished by running the AT+CLEARADDR command. 8.2.17 Command AT+VERSION Inquire Version Response OK
+VERSION<Para1>
Parameter Para1 version #
Note: This command will return the firmware version of the module. 8.2.18 Command AT+INQ?
Inquired remote device Address Response OK + BT address+BT Name Parameter Note: This command commences the discovery process to detect any BT device in the neighborhood. ZBA, Inc. Set/Inquired Paired Device Address 8.2.19 Command AT+RADDR=<Para1>
AT+ RADDR?
Response OK OK RADDR<Para1>
Parameter Para1 Paired device address Example to set-up the Module to communicate with one specific BT device whose BT address is currently unknown. First type:
AT+INQ? What is returned are the BT addresses of the devices in the BT neighbourhood. Then type AT+RADDR= BT address (the specific device you wish to pair determined from the AT+INQ? Command). The module will remain bound to this address until the AT+CLEARADDR is run or the module is powered off and then back on again. 8.2.20 Command AT+LADDR?
Inquired Device BD Address Response OK LADDR<Para1>
Parameter Para1 Device address Note: This command returns the (local) BT address of the module. 8.2.21 Command AT+ RESTART Software Reset Response OK Parameter None 8.2.22 Command Set/Inquire about Low power mode Response Parameter AT+LOWPOWER=<Para1> OK
<Para1>
0 low power disabled 1Low power mode Enabled AT+ LOWPOWER?
OK
+LOWPOWER<Para1>
8.2.23 Set/ Inquire about Data processing mode in the condition of disconnecting Response Command AT+ DATAMODE=<Para1>
OK ZBA, Inc. Parameter
<Para1>
0Data hold into buffer, It will be sent to the other device after connect successfully. 1Data will be throw away in the condition of disconnecting AT+ DATAMODE?
OK DATAMODE<Para1>
8.2.24 Set/ Inquire about Flow control mode Command AT+
FLOWCONTROL=<Para1>
Response OK parameter
<Para1>
0: No Flowcontrol 1Use hardware Flowcontrol AT+ FLOWCONTROL?
OK FLOWCONTROL<Para1>
8.2.25 Command Exiting the Set-up Mode Response Parameter AT+EXIT None None Note: This command returns the module to SPP mode. 9 Low power modes 9.1 Park & Sniff The module will automatically go into a reduced power mode if there is no UART activity and no RF activity. The Device will sniff in order to maintain synchronization with the Master. To save maximum power then it is possible to completely turn-off the power to the module. When operating in this mode the Master/ Slave must then proceed through the Discovery phase (consuming time and energy) before a connection can be re-established. This mode is ZBA, Inc. only recommended if there are very, very long periods of inactivity and the battery power is of the utmost concern. ZBA, Inc. 10 Mounting recommendations For maximized performance please orient the device with the antenna as close to the outside of the housing as possible. Best performance will occur if the underlying PCB does not have a ground plane under the area where the antenna is located. The nearest ground plane should be at least 3mm away from any point on the antenna. Plastic Housing Antenna BT module Ground Planes Host PCB NO Ground Plane 3mm Side View Figure 5 Cross-section of recommended mounting of the BT module No ground Plane in this area 3mm 3mm Figure 6 Bottom View of PCB indicating where there should be NO Ground Plane End ZBA, Inc.