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WIRELESS MADE SIMPLE (R)
HP3 Series Master Development System User's Guide
ORDERING INFORMATION
PART # MDEV-900-HP3-PPS-RS232 MDEV-900-HP3-SPS-RS232 MDEV-900-HP3-PPS-USB MDEV-900-HP3-SPS-USB DESCRIPTION HP3 Series Master Development System Pinned - RS-232 HP3 Series Master Development System SMD - RS-232 HP3 Series Master Development System Pinned - USB HP3 Series Master Development System SMD - USB
INTRODUCTION
The Linx HP3 Series RF modules offer a simple, efficient, and cost-effective method of adding wireless communication capabilities to any product. The Master Development System is intended to give a designer all the tools necessary to correctly and legally incorporate the HP3 Series into an end product. The development boards themselves serve several important functions: * Rapid Module Evaluation - The boards allow the performance of the Linx HP3 Series modules to be evaluated quickly in a user's environment. * Range Testing - By using the on-board encoders and decoders to generate a simplex transmission, a pair of development boards can be used to evaluate the range performance of the modules. * Design Benchmark - During the design process of your product, the boards provide a known benchmark against which the performance of your own design may be judged. * Application Development - An on-board prototyping area is provided to allow a designer to develop applications directly on the development board. All signal lines are available on a header for easy connection to the designer's circuits. * Protocol Development - The development system features two types of Host Interface Modules that allow connection via RS-232 or USB to a PC. Windowsbased demonstration software is also included on CD, which allows for a variety of tests. The Master Development System includes 2 development boards, one set up for the transmitter and the other for the receiver, 2 HP3 Series transmitters*, 2 HP3 Series receivers*, two CW Series antennas, 2 9V batteries, and full documentation.
*One part is soldered to the board, one extra is for use on your first prototype board.
Revised 8/15/08
HP3 SERIES TRANSMITTER DEVELOPMENT BOARD 4
HP3 SERIES RECEIVER DEVELOPMENT BOARD 7 4 8 9
1 5 6
7 9 8 10 2 11
1 5
6 10
2 12 13 3
11 13 12
3
Figure 1: HP3 Series Transmitter Development Board
Figure 2: HP3 Series Receiver Development Board
1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13.
9V Battery DC Power Jack On-Off Switch Host Interface Header Prototyping Area TX Breakout Header TX Channel Selection Mode Switch HP3 Series Transmitter RP-SMA Antenna Connector TX Channel Selection DIP Switch LS Series Encoder Buzzer Button (S3) Relay Button (S2)
1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13.
9V Battery DC Power Jack On-Off Switch Host Interface Header Prototyping Area RX Breakout Header RX Channel Selection Mode Switch HP3 Series Receiver RP-SMA Antenna Connector RX Channel Selection DIP Switch LS Series Decoder Relay Output Buzzer
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GETTING STARTED
After unpacking the development system, attach an antenna to each board and install the supplied 9V battery. The development boards are now ready for use. The two development boards are very similar and either board can be populated with a transmitter or receiver module. The simplex range testing sections of the boards are populated differently since, in the range testing mode, one board is intended to serve as a transmitter and the other as a receiver. All of the module's connections are made available to the designer via the breakout header (J1). The supplied jumper shunts are intended to be placed across adjacent pins to control the routing of TX and RX data.
USING THE SIMPLEX ENCODER/DECODER SECTION
The transmitter board features a custom remote-control encoder with two push buttons and the receiver board features a decoder with a relay output and a buzzer. When a button is pressed on the transmitter board, the status of both buttons is captured and encoded into a data stream for transmission. The data recovered by the receiver is decoded and the decoder's data lines are set to replicate the status of the encoder, driving either the buzzer or the relay. To activate this area of the board, the module data line must be routed to the encoder / decoder. Configure the transmitter board for encoding and transmission by placing a jumper across TX DATA and ENCODER on header J1. Configure the receiver board for reception and decoding by placing a jumper across RX DATA and DECODER on header J1.
J1 HOST TX TX DATA ENCODER TX MODE TX PDN TX CTS TX CS2/DATA TX CS1/CLK TX CS0 GND J1 HOST RX RX DATA DECODER RX AUDIO RX MODE RX RSSI RX PDN RX CS2/DATA RX CS1/CLK RX CS0
CHANNEL SELECTION
Parallel Selection All HP3 models feature eight parallel CS2 CS1 CS0 Channel selectable channels. Parallel mode is 0 0 1 0 selected by grounding the module's MODE 0 0 0 1 line (default setting). Mode Switches SW2 0 1 1 2 (TX) and SW3 (RX) have been provided to allow the developer to easily switch between 0 1 0 3 parallel and serial modes. In parallel mode, 1 0 1 4 channel selection is determined by the logic 1 0 0 5 states of lines CS0, CS1, and CS2, as shown 1 1 1 6 in the adjacent table. DIP switches are used 1 1 0 7 on the development boards to set the channels. If the switch is set to ON, then the 0 = On/Low 1 = Off/High pin is connected to ground, otherwise it is Table 1: Channel Selection Table pulled up inside the module. The DIP switch positions on both boards must match in order for the modules to communicate. Serial Selection In addition to the parallel mode, PS versions of the HP3 also feature 100 serially selectable channels. The serial mode is entered when the MODE line is left open or held high. On the Master Development boards, this is accomplished using the appropriate Mode Switch; SW2 (TX) or SW3 (RX). In this condition CS1 and CS2 become a synchronous serial port with CS1 serving as the clock line and CS2 serving as the data line. The module is then easily programmed by sending and latching the binary number (0-100) of the desired channel. The programming data is supplied externally by the development system user. Often it will originate from a microcontroller or emulator, which can be located in the prototyping area. Using HP3 modules in serial mode is straightforward; however, minimum timings and bit order must be followed. Please see the HP3 Series Data Guides for these timings. *IMPORTANT* The channel selection DIP switch must be in the OFF position in order for the serial lines to be used, otherwise the signal from the microcontroller will be shunted to ground. It is recommended that resistors be placed in series on the data and clock lines to limit current and protect your microcontroller in case the switches are accidentally turned on.
TX
RX
Once the boards have been SIMPLEX RANGE TEST configured, place the receiver board on JUMPER CONFIGURATION a flat surface and turn it on. Turn on the (Factory Default) transmitter board and press button S3. You should hear the buzzer on the Figure 3: Jumper Configuration receiver board sound. You may now walk away from the receiver to ascertain the useable range of the link in your environment. Another simple but often overlooked range-testing method is to hold down or bridge the buzzer button so that a continuous transmission is made and then walk with the receiver side for testing. Button S2 activates the relay on the receiver board. The relay's SPST contacts can be connected at J2. Any device up to 5A at 30VDC / 120VAC may be switched through the relay. Most commonly, an external siren or light would be connected to aid range testing if the on-board buzzer is not loud enough. As you near the maximum range of the link in your area, it is not uncommon for the signal to cut in and out as you move. This is normal and can result from other interfering sources or fluctuating signal levels due to multipath effects. This results in cancellation of the transmitted signal as direct and reflected signals arrive at the receiver at differient times and phases. The areas in which this occurs are commonly called "nulls" and simply walking a little farther will often restore the signal. To achieve maximum range, keep objects such as your hand away from the antenna and ensure that the antenna on the transmitter has a clear and unobstructed line-of-sight path to the receiver board. Range performance is determined by many interdependent factors. If the range you are able to achieve is significantly less than specified by Linx for the products you are testing, then there is likely a problem with either the board or the ambient RF environment in which the board is operating. First, check the battery, switch positions, and antenna connection. Next, measure the receiver's RSSI voltage with the transmitter turned off to determine if ambient interference is present. If this fails to resolve the issue, please contact Linx technical support.
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HOST INTERFACE MODULE
The HP3 Master Development System features a Host Interface socket, which allows the use of two different PC interface modules. The first is a USB interface module that uses a standard USB cable (not included) to connect to a PC's USB port or a USB hub. The second type of module is a RS-232 interface module that can be connected to a standard serial COM port on a PC using a straight-through 9-pin extension cable (not included). The evaluation board is considered a DCE device and as such is designed to be connected using a straight-thru serial extension cable. Do not use a null-modem cable as the boards will not function.
THE PROTOTYPING AREA
A designer wishing to use the development board for product prototyping may route the necessary signals from the development board's breakout header to the prototyping area and then use this to build the custom circuitry. J1 is a wire-wrap header that is provided as an easy access point to the module's signals. The header pins extend through the board to allow wire attachment on the back of the board. USB Interface Module Regulated power connections are available on the buses labeled "GND" and "+5VDC". The board also has a DC power jack to allow powering from an external power supply rather than with the battery. This jack accepts a 5.5mm plug with the tip ground and the outer shell 7-16VDC positive supply. NOTE: The on-board 5-volt regulator has approximately 500mA of headroom available for user's circuitry. If additional current capacity is required, the user must add an additional regulator to the prototyping area or power the board from an external supply.
Ground Bus
To install, select the module to be used and then line up the pins on the module with the headers on the board. Verify that the pin one polarity marks on the board and on the Host Interface RS232 Interface Module Module match. The USB jack or the D-sub connector should face away from the board. Figure 4: Host Interface Modules Press firmly on the module so that it slides fully into the header. The development system may be prepared J1 J1 for host operation with the supplied Linx HOST RX HOST TX RX DATA TX DATA software by setting the jumpers on the DECODER ENCODER header as shown in the adjacent figure. This RX AUDIO TX MODE RX MODE TX PDN routes the module's data lines to the Host RX RSSI TX CTS Interface Module. Despite being electrically RX PDN TX CS2/DATA RX CS2/DATA TX CS1/CLK interfaced, appropriate protocol must be RX CS1/CLK TX CS0 employed to ensure reliable and error-free RX CS0 GND data transfer since the HP3 Series modules TX RX do not encode or packetize the data in any HOST MODE JUMPER manner. It is important to understand that CONFIGURATION the development boards are transparent; that is, the user's software is entirely Figure 5: Jumper Configuration responsible for controlling the timing and error correction aspects of the link. The evaluation boards have no provision to check or qualify the incoming data. When designing a protocol to transfer data across a wireless link, it is very important to remember that interference is inevitable. The protocol must support error detection and correction if it is to be successful. A correctly designed protocol will provide optimum performance and throughput for product-specific applications while taking into account the timing and data-rate requirements of the module. For further information on protocol considerations please refer to Application Note AN-00160. If the designer needs to develop protocols using a physical implementation other than an RS-232 or USB interface, the designer can build the custom interface circuitry in the prototyping area and route the module's data signals from the header to the prototyping area.
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Regulator +5 Volt Bus
Figure 6: The Prototyping Area
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MASTER DEVELOPMENT SOFTWARE
The development system is supplied with Windows-based software that facilitates communication with the development boards through the Host Interface Module. This software allows for testing and illustrates basic implementation of the modules as a wireless serial link. The user selects either a USB or RS232 connection and whether the connected board is the transmitter or receiver. The user can Figure 7: Master Development Software then send text, ASCII characters, and even a picture. Documentation for the software may be found by going to the 'Help' menu then 'Help File'. Terminal emulation programs, such as HyperTerminal, do not provide error correction; therefore, bit errors or data line hashing will be displayed as random characters. Some form of error detection should be employed when developing a protocol for wireless environments (please see Application Note AN-00160).
ONLINE RESOURCES
(R)
www.linxtechnologies.com
* * * * *
Latest News Data Guides Application Notes Knowledgebase Software Updates
USING THE BOARDS AS A DESIGN REFERENCE
The master development boards included in this kit are very simple, yet they illustrate some important techniques that you may wish to incorporate into your own board layout. You will observe that the HP3 mounting pads (SMD version) extend slightly past the edge of the part. This eases hand assembly and allows for better heat conduction under the part if rework is necessary. Next, observe the use of a full ground plane fill on the lower side of the board. This ground plane serves three important purposes: First, since a 1/4-wave antenna is employed, the ground plane is critical to serve as a counterpoise (you may wish to read Application Note AN-00500 Antennas: Design, Application, and Performance for additional details on how a ground plane affects antenna function). Second, a ground plane will suppress the transfer of noise between stages of a product, as well as unintentional radiation of noise into free space. Third, a ground plane allows for the implementation of a microstrip feed to the antenna. The term microstrip refers to a PCB trace running over a ground plane that is designed to serve as a 50-ohm transmission line between the module and the antenna. A microstrip is implemented on this evaluation board. If you are unfamiliar with microstrip calculations, you may wish to refer to the HP3 Series Data Guides or the calculator available on the Linx Technologies website.
If you have questions regarding any Linx product and have Internet access, make www.linxtechnologies.com your first stop. Our website is organized in an intuitive format to immediately give you the answers you need. Day or night, the Linx website gives you instant access to the latest information regarding the products and services of Linx. It's all here: manual and software updates, application notes, a comprehensive knowledgebase, FCC information, and much more. Be sure to visit often!
www.antennafactor.com The Antenna Factor division of Linx offers a diverse array of antenna styles, many of which are optimized for use with our RF modules. From innovative embeddable antennas to low-cost whips, domes to Yagis, and even GPS, Antenna Factor likely has an antenna for you, or can design one to meet your requirements.
ABOUT ANTENNAS
The choice of antennas is one of the most critical and often overlooked design considerations. The range, performance, and legality of an RF link are critically dependent upon the type of antenna employed. Linx offers a variety of antenna styles that you may wish to consider for your design. Included with your kit is a Linx CW Series connectorized whip antenna that should be connected prior to using the kit. Despite the fact that the antenna is not centered on the board's ground plane, it exhibits a VSWR of <1.7 and suitably demonstrates the module's best practical performance.
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www.connectorcity.com Through its Connector City division, Linx offers a wide selection of high-quality RF connectors, including FCCcompliant types such as RP-SMAs that are an ideal match for our modules and antennas. Connector City focuses on high-volume OEM requirements, which allows standard and custom RF connectors to be offered at a remarkably low cost.
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MAIN DEVELOPMENT BOARD
Power Supply Section
J5 PWRJACK SW1
1
USB HOST INTERFACE BOARD
U1
LM7805 5V REGULATOR Vin
GND VCC VCC
Vout
3
7-16 VDC TIP NEG. DIODE400
POWER SWITCH
D2
B1
9V BATTERY
2
+ C1
220uF
+ C2
10uF
GND
GND
GND
GND
GND
RF Module Section
ANT2
REVSMA
RX1
GND GND GND GND GND GND GND 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 RFIN GND GND GND GND GND GND GND NC CS0 CS1/U CLOCK CS2/U DATA PDN RSSI GND VCC AUDIO DATAOUT NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19
J2
GSHD GSHD
USB-B
GND DAT+ DAT 5V 4 3 2 1 GND
ANT1
REVSMA
GND GND GND GND
TX CS0 TX CS1 CLK TX CS2 DAT TX CTS TX PDN VCC TX MODE TX DATA
TX1
1 2 3 4 5 6 7 8 9 10 11 12 GND RF OUT GND NC CS0 CS1/U CLOCK CS2/U DATA CTS PDN VCC GND/MODE DATAIN NC NC NC NC GND NC NC NC NC NC NC GND 24 23 22 21 20 19 18 17 16 15 14 13 GND GND GND
U1
1 2 USBDP USBDM GND VCC SUSP_IND RX_IND TX_IND 485_TX
SDM-USB-QS-S
RI DCD DSR DATA_IN DATA_OUT RTS CTS DTR 16 15 14 13 12 11 10 9 PDN RX DATA TX DATA TRSEL GND GND 1 2 3 4 5 6 7 8
J1
GND NC NC NC VCC NC NC GND
HIB-DIPMODULE
GND NC NC RX DATA TX DATA RTS/TRSEL DTR/PDN GND 16 15 14 13 12 11 10 9 GND
GND 6 5
3 4 5 6 7 8
S1
TX CS2 DAT TX CS1 CLK TX CS0
S4
RX CS2 DAT RX CS1 CLK RX CS0
GND GND
1 2 3
6 5 4
1 2 3
6 5 4
SW DIP-3
GND
GND
SW DIP-3
GND
TXM-XXX-HP-S
RX CS0 RX CS1 CLK RX CS2 DAT RX PDN RX RSSI RX MODE VCC RX AUDIO RX DATA
RX DATA TX DATA TRSEL PDN GND
RXM-XXX-HP-S
Header Section
J1
GND TX CS0 TX CS1 CLK TX CS2 DAT TX CTS TX PDN TX MODE TX ENCODER TX DATA TX RS232/USB RX CS0 RX CS1 CLK RX CS2 DAT RX PDN RX RSSI RX MODE RX AUDIO RX DECODER RX DATA RX RS232/USB 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
SW2
SW-SPDT
J4
GND 1 2 3 4 VCC 5 6 7 GND 8 GND NC NC NC VCC NC NC GND GND NC NC RX DATA TX DATA RTS/TRSEL DTR/PDN GND 16 15 14 13 12 11 10 9
RX RS232/USB TX RS232/USB TX PDN
GND
GND
SW3
SW-SPDT
GND
RS232 HOST INTERFACE BOARD
GND
CON20
Proto Signal Header Simplex Range Test Section
Host Interface Header Components Populated For Transmit
VCC
S2
SW-PB
VCC
VCC
J2
RELAY OUT
1 2
U2
VCC
TX ENCODER
200K
GND D0 D1 D2 8 7 6 5 GND GND
1 2 3
VCC DATA OUT D3 SEL_BAUD
S3
SW-PB
C3 R2
200K 3.3uF
+
VCC VCC
4
RE1
RELAY-SPDT
LICAL-ENC-LS001
J2 D1
GND
C4
3.3uF
+
Components Populated For Receive
Q1
2N2222
RELAY OUT
1 2
VCC
1N4148
S2
SW-PB
C5
3.3uF
VCC
R1
VCC
RX DECODER TX ENCODER
R6
R8
10K
GND
1 VCC 2 DATA
U2
200K 2.2K
GND 8 D0 7 GND GND VCC
RE1
RELAY-SPDT
VCC
3 D3 D1 6 4 SEL_BAUD D2 5
D1 S3
SW-PB GND
VCC 1 2 3 VCC 4
1N4148
LICAL-XXX-LS001
U2
VCC DATA IN D3 SEL_BAUD GND D0 D1 D2 8 7 6 5 GND GND
Q1
2N2222
R2
200K
GND
R6
2.2K
R8 8
10K
GND
BZ1
BUZZER
RX DECODER
LICAL-DEC-LS001
BZ1
BUZZER
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+
U1
MAX232
1 2 3 4 5 6 7 8 C1+ V+ C1C2+ C2VT2OUT R2IN VCC GND T1OUT R1IN R1OUT T1IN T2IN R2OUT 16 15 14 13 12 11 10 9 GND
R1
VCC
C1
3.3uF
+ C2
4.7uF
1 6 2 7 3 8 4 9 5
J2
RS-232
GND
TR SEL TX RS232 RX RS232 PDN
GND
+
GND
J1
GND 1 2 3 4 5 6 7 8 GND NC NC NC VCC NC NC GND GND NC NC RX DATA TX DATA RTS/TRSEL DTR/PDN GND 16 15 14 13 12 11 10 9 GND
VCC
RX RS232 TX RS232 TR SEL PDN GND
GND
HIB-DIPMODULE
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WIRELESS MADE SIMPLE (R)
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LINX TECHNOLOGIES, INC.
159 ORT LANE MERLIN, OR 97532
PHONE: (541) 471-6256 FAX: (541) 471-6251
www.linxtechnologies.com
Disclaimer
Linx Technologies is continually striving to improve the quality and function of its products. For this reason, we reserve the right to make changes to our products without notice. The information contained in this Overview Guide is believed to be accurate as of the time of publication. Specifications are based on representative lot samples. Values may vary from lot-to-lot and are not guaranteed. "Typical" parameters can and do vary over lots and application. Linx Technologies makes no guarantee, warranty, or representation regarding the suitability of any product for use in any specific application. It is the customer's responsibility to verify the suitability of the part for the intended application. NO LINX PRODUCT IS INTENDED FOR USE IN ANY APPLICATION WHERE THE SAFETY OF LIFE OR PROPERTY IS AT RISK. Linx Technologies DISCLAIMS ALL WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL LINX TECHNOLOGIES BE LIABLE FOR ANY OF CUSTOMER'S INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING IN ANY WAY FROM ANY DEFECTIVE OR NON-CONFORMING PRODUCTS OR FOR ANY OTHER BREACH OF CONTRACT BY LINX TECHNOLOGIES. The limitations on Linx Technologies' liability are applicable to any and all claims or theories of recovery asserted by Customer, including, without limitation, breach of contract, breach of warranty, strict liability, or negligence. Customer assumes all liability (including, without limitation, liability for injury to person or property, economic loss, or business interruption) for all claims, including claims from third parties, arising from the use of the Products. The Customer will indemnify, defend, protect, and hold harmless Linx Technologies and its officers, employees, subsidiaries, affiliates, distributors, and representatives from and against all claims, damages, actions, suits, proceedings, demands, assessments, adjustments, costs, and expenses incurred by Linx Technologies as a result of or arising from any Products sold by Linx Technologies to Customer. Under no conditions will Linx Technologies be responsible for losses arising from the use or failure of the device in any application, other than the repair, replacement, or refund limited to the original product purchase price. Devices described in this publication may contain proprietary, patented, or copyrighted techniques, components, or materials. Under no circumstances shall any user be conveyed any license or right to the use or ownership of such items.
(c) 2008 by Linx Technologies, Inc. The stylized Linx logo, Linx, "Wireless Made Simple", CipherLinx, and the stylized CL logo are the trademarks of Linx Technologies, Inc. Printed in U.S.A.

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