Users Manual
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| Document ID | 862080 |
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| Document Description | Users Manual |
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| Document Type | User Manual |
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| Date Submitted | 2007-10-31 00:00:00 |
| Date Available | 2007-10-31 00:00:00 |
| Creation Date | 2007-10-30 16:10:58 |
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| Document Lastmod | 2007-10-30 16:10:58 |
| Document Title | Microsoft Word - Users Manual.doc |
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| Document Author: | 9335 |
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. Document Status .............................................................................................................. 4 Scope................................................................................................................................ 5 Bluetooth Assembly Description: .................................................................................... 5 Features ............................................................................................................................ 5 Applications ..................................................................................................................... 6 Block Diagram ................................................................................................................. 6 Specifications ................................................................................................................... 7 7.1 Pin Configurations & Dimensions ........................................................................... 7 7.2 Dimensional drawing ............................................................................................... 9 7.3 General Specifications ........................................................................................... 10 7.4 Electrical Characteristics ....................................................................................... 10 7.4.1 Absolute Maximum Ratings .......................................................................... 10 7.4.2 Radio Characteristics ..................................................................................... 10 7.4.3 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 8.1 Default Configuration ............................................................................................ 14 8.2 Configuration Command Set-up & Procedures ..................................................... 14 8.2.1 Entering the Set-up Mode .............................................................................. 15 8.2.2 Testing the Communication Link .................................................................. 15 8.2.3 Command list ................................................................................................. 15 8.2.4 Set RS232 Baud Rate (bps)............................................................................ 15 8.2.5 Set/inquired UART Parameters ..................................................................... 16 8.2.6 Set Authentication.......................................................................................... 16 8.2.7 Set Password .................................................................................................. 16 8.2.8 Set Device Name............................................................................................ 17 8.2.9 Set Device Type ............................................................................................. 17 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 Mode—Extended..................................................... 18 8.2.14 Reset to Factory Default ................................................................................ 18 8.2.15 Set/Inquire Scan Time.................................................................................... 18 8.2.16 Set/Inquire Paired Device .............................................................................. 19 8.2.17 Inquire Version .............................................................................................. 19 8.2.18 Inquired remote device Address ................................................................... 19 8.2.19 Set/Inquired Paired Device Address .............................................................. 20 8.2.20 Inquired Device BD Address ......................................................................... 20 8.2.21 Software Reset ............................................................................................... 20 8.2.22 Set/Inquire about Low power mode............................................................... 20 8.2.23 Set/ Inquire about Data processing mode in the condition of disconnecting. 21 8.2.24 Set/ Inquire about Flow control mode ........................................................... 21 8.2.25 Exiting the Set-up Mode ............................................................................... 21 ZBA, Inc. Low power modes.......................................................................................................... 21 9.1 Park & Sniff ........................................................................................................... 21 10 Mounting recommendations ...................................................................................... 23 11 Ordering Information ................................................................................................. 24 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 ZBA’s 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 ZBA’S 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 Comments First draft Add AT command set http://www.bluetoothmodules.net publication Update current measurements 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: bluetooth–support@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 BC04191 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 FAX, Printer Adaptors Digital Camera Access Points to LAN and/or Dial-up network 6 Block Diagram Figure 1 Block Diagram of the BT Module ZBA, Inc. 7 Specifications 7.1 Pin Configurations & Dimensions 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 12 11 10 6 4 2 Antenna Holes in PCB to connector 97 5 3 1 Top view connector Side view 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 VCC –Pin 1 Low impedance P-FET From Pin 10K 3.3 volt supply to module Figure 3 Input circuit of Module power control (pin10) ZBA, Inc. 7.2 Dimensional drawing 1.8 mm 2.0 mm 30mm ∅1.8mm x 2 1.8 mm 2.5mm 17.5mm 2.0 mm Figure 4 Dimensional drawing of the BC04-191 1.0mm 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 7.4 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% -20°C to 85°C -40°C to 85°C 30mm X 17mm X 3.15 mm Ceramic 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 2.7 to 3.6V -0.3V to 3.6V -40°C to 150°C (ambient) 0-90% RH -20°C< TA<95°C 75 mA 7.4.2 Radio Characteristics Receiver Sensitivity at 0.1% Temperature = -20°C Frequency Min Typ (GHz) 2.402 -84 Max Bluetooth Specification -80 Unit dBm ≤-70 ZBA, Inc. 2.441 BER -84 -80 -84 -80 10 ≤-20 dBm Min Typ Max Bluetooth Specification Unit 2.5 2.5 2.5 RF power control range 35 ≥16 dB RF power range control resolution 20 dB bandwidth for modulated carrier Initial carrier frequency tolerance 1.8 dB 800 1000 KHz ±25 ≤ ±75 KHz Drift ±15 ≤ ±25 KHz Drift Rate ±20 400 Hz/µs ∆f1avg "Maximum Modulation" 165 140<∆f1avg <175 KHz ∆f2avg "Minimum Modulation" 150 115 KHz 2.480 Maximum received signal at 0.1% BER Frequency Transmitter (GHz) 2.402 RF transmit power 2.441 (1)(2) 2.480 dBm dBm dBm -6 to +4 (3) dBm dBm 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. Receiver Sensitivity at 0.1% BER Temperature = +20°C Frequency Min Typ Max (GHz) 2.402 -82 -80 Bluetooth Specification Unit dBm ≤-70 2.441 -84 -80 dBm 2.480 -84 -80 dBm ≥-20 dBm Min Typ Max Bluetooth Specification Unit Maximum received signal at 0.1% BER Frequency Transmitter (GHz) ZBA, Inc. 2.402 2.5 2.441 2.5 2.480 2.5 RF power control range 35 ≥16 dB RF power range control resolution 20 dB bandwidth for modulated carrier Initial carrier frequency tolerance 1.8 dB 800 1000 kHz ±25 ≤ ±75 kHz Drift ±15 ≤ ±25 kHz Drift Rate ±20 400 Hz/µs ∆f1avg "Maximum Modulation" 165 140<∆f1avg <175 kHz ∆f2avg "Minimum Modulation" 150 115 kHz C/I co-channel 10 11 ≤ 11 dB -4 ≤0 dB -35 -30 ≤ -30 dB -45 ≤ -40 dB -45 ≤ -40 dB Adjacent channel selectivity C/I f=fimage -18 -9 ≤ -9 dB Adjacent channel transmit power f=f0±2MHz Adjacent channel transmit power f=f0±3MHz -35 -20 ≤ -20 dBc -35 -40 ≤ -40 dBc ≥-20 dBm Min Typ Max Bluetooth Specification Unit 2.441 2.480 RF power control range 35 ≥16 dB RF power range control resolution 20 dB bandwidth for modulated carrier 1.8 dB 800 1000 kHz RF transmit power 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 ≤ f03MHz Maximum received signal at 0.1% BER Frequency Transmitter (GHz) 2.402 RF transmit power dBm -6 to +4 dBm dBm dBm -6 to +4 dBm dBm ZBA, Inc. Initial carrier frequency tolerance ±25 ≤ ±75 kHz Drift ±15 ≤ ±25 kHz Drift Rate ±20 400 Hz/µs ∆f1avg "Maximum Modulation" 165 140<∆f1avg <175 kHz ∆f2avg "Minimum Modulation" 150 115 kHz 7.4.3 Power Consumption 7.4.3.1 Current measurements on the BC04-191 Description Ipd Value 300 Units uA 24 mA I conn-ps 1.32 mA I conn-t 24 mA 23.5 mA Idis I conn-r Comments Power down- NPWR= hi, Mode: not connectable Mode Discovery & connecting, Average 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 Connection UART Rate Average Unit Type (kbps) Page scan ---- 115.2 - 0.42 mA Inquiry and page scan 115.2 0.76 mA ACL No traffic Master 115.2 4.60 mA ACL With file transfer Master 115.2 10.3 mA ACL No traffic Slave 115.2 17.0 mA ACL With file transfer Slave 115.2 24.7 mA ACL 40ms sniff Master 38.4 2.40 mA ACL 1.28s sniff Master 38.4 0.37 mA SCO HV1 Master 38.4 39.2 mA ZBA, Inc. SCO HV3 Master 38.4 20.3 mA SCO HV3 30ms sniff Master 38.4 19.8 mA ACL 40ms sniff Slave 38.4 2.11 mA ACL 1.28s sniff Slave 38.4 0.42 mA Parked 1.28s beacon Slave 38.4 0.20 mA SCO HV1 Slave 38.4 39.1 mA SCO HV3 Slave 38.4 24.8 mA SCO HV3 30ms sniff Slave 38.4 19.0 mA Standby Host connection(a) 38.4 40 uA Reset (RESETB low)(a) --- --- 34 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 module’s 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 PC’s 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 firstcommand contain a suffix of . 8.2.1 Entering the Set-up Mode Command ESC Response OPEN:num Parameter Num= 0: device is not paired Num= 1 Device is currently paired 8.2.2 Testing the Communication Link Command AT Response OK Parameter None 8.2.3 Command list Command ATZ? Response List of Commands Parameter None 8.2.4 Set RS232 Baud Rate (bps) Command Response Parameter ZBA, Inc. AT+BAUD= OK Para1 = 1200, 2400, 4800, 9600, 19200, 38400, 57600, 115200, 230400 AT+BAUD? OK +BAUD Note: The default baud rate is 9600bps 8.2.5 Set/inquired UART Parameters Command AT+UARTMODE= , OK AT+ UARTMODE? Response OK UARTMODE , Parameter = Stopbit 0 = 1 Stop bit 1 = 2 Stop bits Paritybit 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= Response OK AT+AUTH? OK AUTH 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 OK Parameter Para1 Password ZBA, Inc. Default = 1111 AT+PASSWORD? OK +PASSWORD: < Para1> Note: The default authentication password = 1111 8.2.8 Set Device Name Command AT+NAME= < Para1> AT+NAME? Response OK OK +NAME Parameter Para1= Device name Default= ZBA-SPP Note: The default Device name = ZBA-SPP. 8.2.9 Set Device Type Command AT+CLASS=< Para1> AT+CLASS? 8.2.10 Command AT+ROLE=< Para1> Response OK OK CLASS Parameter Para1 Device type (Length must = 6 characters) default = 000000 Set Master/Slave Mode Response OK Parameter Para1 Slave = 0, Master = 1 AT+ROLE? OK Default = 0, Slave ROLE 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). ZBA,8.2.11 Inc. Command AT+CLEARADDR Response Parameter OK None Note: This command will clear any remote device address that the module has been paired to. 8.2.12 Set Sniff Power Saving Mode Command Response AT+SNIFF= , , OK , AT+SNIFF? OK +SNIFF , , , 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 Mode—Extended Command Response AT+SNIFFEX= , , OK , AT+SNIFFEX? OK SNIFF , , , 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 8.2.15 Reset to Factory Default Response Parameter OK None Set/Inquire Scan Time Command AT+SCANTIME= , , OK , Response Parameter Para1= Scan interval time Para2=Scan time-out Para3=Inquiry interva Clear Pa ZBA, Inc. AT+SCANTIME? Para4=Inquiry timeout OK +SCAN , , , Note: The default Value (in decimal = N* 625 us) Para1= 2048, Para1= 18, Para1= 2048, Para1= 18, 8.2.16 Command AT+BIND= < Para1> AT+BIND? Set/Inquire Paired Device Response OK OK +BIND 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 Parameter Para1 version # Note: This command will return the firmware version of the module. . 8.2.18 Command AT+INQ? Inquired remote device Response OK + BT address+BT Name Address Parameter Note: This command commences the discovery process to detect any BT device in the neighborhood. ZBA, Inc. 8.2.19 Set/Inquired Paired Device Address Command AT+RADDR= AT+ RADDR? Response Parameter Para1 Paired device address OK OK RADDR 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 Inquired Device BD Address Command AT+LADDR? Response Parameter OK Para1 LADDR Device address Note: This command returns the (local) BT address of the module. 8.2.21 Software Reset Command AT+ RESTART 8.2.22 Response OK Set/Inquire about Low power mode Command AT+LOWPOWER= AT+ LOWPOWER? Parameter None Response OK OK +LOWPOWER： Parameter ： 0： low power disabled 1：Low power mode Enabled ZBA, Inc. 8.2.23 Set/ Inquire about Data processing mode in the condition of disconnecting Command AT+ DATAMODE= AT+ DATAMODE? 8.2.24 Response OK ： 0：Data hold into buffer, It will be sent to the other device after connect successfully. 1：Data will be throw away in the condition of disconnecting OK ＋DATAMODE： Set/ Inquire about Flow control mode Command AT+ FLOWCONTROL= Response OK AT+ FLOWCONTROL? OK ＋FLOWCONTROL： 8.2.25 Parameter parameter ： 0: No Flowcontrol 1：Use hardware Flowcontrol Exiting the Set-up Mode Command AT+EXIT Response None Parameter 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. BT module Antenna Plastic Housing Ground Planes Host PCB 3mm NO Ground Plane Figure 5 Side View Cross-section of recommended mounting of the BT module No ground Plane in this area 3mm Figure 6 Bottom View of PCB indicating 3mm where there should be NO Ground Plane End ZBA, Inc.
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