MOD-RFID125 User Manual
Contents
1. Ds Continuous scanning 120 mA Scanning 2 times per second 36 mA Icc Power Supply Current Continuous scanning 130 mA with activated LEDs Scanning 2 times per second 40 mA ORDER CODE MOD RFID125 assembled and tested no kit no soldering required How to order You can order to us directly or by any of our distributors Check our web www olimex com dev for more info Revision history REV A create April 2008 Disclaimer 2008 Olimex Ltd All rights reserved Olimex logo and combinations thereof are registered trademarks of Olimex Ltd Other terms and product names may be trademarks of others The information in this document is provided in connection with Olimex products No license express or implied or otherwise to any intellectual property right is granted by this document or in connection with the sale of Olimex products Neither the whole nor any part of the information contained in or the product described in this document may be adapted or reproduced in any material from except with the prior written permission of the copyright holder The product described in this document is subject to continuous development and improvements All particulars of the product and its use contained in this document are given by OLIMEX in good faith However all warranties implied or expressed including but not limited to implied warranties of merchantability or fitness for purpose are excluded This document is intend2. OUPIEX MOD RFID125 User Manual Petes Geen Al boards produced by Olimex are ROHS compliant Rev A February 2008 Copyright c 2008 OLIMEX Ltd All rights reserved INTRODUCTION MOD RFID125 is an RFID station able to read Manchester encoded 64 bit EM4102 tags with 64 periods of carrier frequency per data bit All the complexity of RFID tag detection verification and decoding are handled by MOD RFID125 After it strips the header and the checksums user is given the 40 bit ID of the transponder tag MOD RFID125 supports three distinctive modes of operation easily switched by a single button press It can emulate USB HID keyboard and input the read TAG ID directly to any Windows application including the venerable Notepad Or it can emulate USB CDC serial port for easy access from custom user applications using standard code for COM port access The third option allows access from any standard 5V UART allowing easy integration with existing microcontroller applications FEATURES Supports Manchester encoded 64 bit EM4102 RFID tags with 64 periods of carrier frequency per data bit Base RFID frequency 125kHz USB port connection to PC UART 9600 8N1 connection to user microcontroller boards Three modes of operation easily changed by pressing the button USB HID keyboard emulation mode USB CDC serial port emulation mode UART connection mode Simple command line interface in USB CDC and UART modes for configurat
3. ed only to assist the reader in the use of the product OLIMEX Ltd shall not be liable for any loss or damage arising from the use of any information in this document or any error or omission in such information or any incorrect use of the product
4. ers If F is O then RF antenna is constantly switched on and the device is scans continuously for tags Otherwise if F is 1 5 the device will switch the antenna on F times per second If R is O then a successfully read RF tag ID is reported only once Otherwise if R is 1 9 the device will report the tag ID every R seconds until the tag is seen in the proximity Example continuous scanning single report per seen tag mcOO Example scan once per second single report per seen tag mc10O Example scan twice per second report a seen tag every second mc2 1 Example continuous scanning report a seen tag every 5 seconds mcO5 7 Command mlE Set LED mode If E is 0 LEDs will be disabled Otherwise if E is 1 LEDs will be enabled Example enabling LEDs mll Example disabling LEDs to conserve power mlO Below is a screen shot of command line session using HyperTerminal tty _ xxx Hyperfienminal File Edit View Call Transfer Help Dae s3 085 F gt gt mso gt 1 MOD RFID125 Hardware revision A Firmware revision 01 00 Read mode msd ml1 http www olimex com gt r 0000000000 gt r E80028F01D gt mc21 gt E80028F01D gt E80028F01D gt E80028F01D gt Print echo FIRMWARE UPGRADE MOD RFID125 contains a built in boot loader for easy firmware upgrade Device enters boot loader mode if the application FLASH section is corrupted To force the d
5. evice to enter boot loader mode for manual firmware update do the following 1 Disconnect the device from any power source external DC USB 2 Press and hold the button 3 Power up the device by connecting it to USB 4 Device now must be in boot loader mode indicated by the LED light sequence a RED on GREEN off b RED off GREEN on c RED off GREEN off Button can now be released The device will stay in boot loader mode until it is power cycled Boot loader implements the standard protocol XMODEM with CRC16 for firmware update User is free to use his favorite terminal client HyperTerminal minicom etc to upload the firmware images taken from our website Boot loader uses an USB virtual serial port that is baudrate agnostic As an alternative we provide a simple Windows GUI application for users who don t want to or cannot use terminal software After the firmware image is uploaded the target will blink the GREEN LED if update was successful otherwise it will blink the RED LED if firmware image was invalid or update was unsuccessful Device stays in this state until it is power cycled WARNING Upgrade via UART is NOT supported Boot loader supports only USB ELECTRICAL CHARACTERISTICS Symbol Description Condition Min Typ Max Uni ts Vcc Power Supply Voltage 4 5 5 5 5 V Iccnotep Power Supply Current Idle RF scanning not active 20 mA with deactivated LE
6. his mode there is no need for USB connection Instead the device must be connected via TTL level UART of a microcontroller system of choice It expects the peer to be configured with 9600 bps 8bit character no parity 1 stop bit The communication is otherwise the same as in USB CDC mode but there is no need for USB Again all entered characters are echoed back MOD RFID125 s signals RxD and TxD are leaded away to pads which are shown at the picture below From this side of the board where is the button are leaded total five signals RxD TxD LED1 GND and 5V TxD output from MOD RFID125 RxD input for MOD RFID125 LED1 doubles LED1 command signal GND Ground 5V 5V from USB SWITCHING OPERATING MODES The current mode of operation can be selected by pressing and holding the button of the device After two seconds the LEDs will start to blink and will show the code for the next selected mode When button is released the device will reboot and enter the selected mode Selected mode is remembered between power downs The assigned codes are LED Status Description Red Green Previous State State After Button Is Released blinks off UART USB HID off blinks USB HID USB CDC blinks blinks USB CDC UART COMMAND LINE INTERFACE USB CDC and UART modes The command line interface available in USB CDC and UART modes allows device configuration and reading of successfully decoded TAG ID
7. ion and data acquisition Two LEDs indicating device status and tag presence Support for continuous and periodic RF scanning to better suit user power requirements Ships with default mode USB HID and default configuration continuous read scan always one report per second LEDs activated ELECTROSTATIC WARNING The MOD RFID125 board is shipped in protective anti static packaging The board must not be subject to high electrostatic potentials General practice for working with static sensitive devices should be applied when working with this board REQUIREMENTS Cables 1 8 meter USB A B cable Software Software needed for USB HID keyboard mode Notepad or other text editor Software needed for USB CDC and UART modes HyperTerminal or other terminal program SUPPORTED RFID TAGS MOD RFID125 supports RFID transponder tags with the following characteristics Based on EM4102 chip 125kHZ carrier frequency 64 bit ROM continuously transmitted 64 periods of carrier frequency per data bit Manchester encoding LEDS In normal mode the GREEN LED is on whenever the RF antenna circuit is active and scanning for RFID tags The RED LED switches on whenever a valid RF TAG ID is being scanned and decoded successfully The LEDs can be switched off to save power consumption See the Command Line Interface section for more information In boot loader mode the LEDs have other meaning See the Firmware Upg
8. n the kernel user should look either for dev ttyACMn or dev ttyUSBn where n is a number assigned by the kernel to the plugged device USB HID MODE When device is connected via USB to a host PC it will represent itself as USB HID keyboard When an RFID transponder is detected in the vicinity the module will type the HEX representation of the transponder ID To use the device in this mode 1 0pen Notepad 2 Plug in the device in the USB port of the PC 3 Put an RFID tag in front of the device The TAG ID will be entered in the currently opened text file There is no need for OS driver because all major operating systems include USB HID drivers NOTE This mode does not allow configuration of device parameters MOD RFID125 is shipped with default configuration for continuous read and one second repeat If this must be changed then device must be switched to USB CDC mode and configured using the serial command line interface USB CDC MODE In this mode the device represents itself as USB CDC virtual serial port It provides a simple shell like command line interface for configuring and interacting with the module The device echoes back the typed characters and waits for Carriage Return Enter before processing the line input See Command Line Interface for more information on the supported commands Any terminal software can be used to open the COM port assigned by the OS and type in commands UART MODE In t
9. or the best driver in these locations Use the check boxes below to limit or expand the default search which includes local paths and removable media The best driver found will be installed _ Search removable media floppy CD ROM Iv Include this location in the search c MY_TEMPORARY_FOLDER w Browse Dont search will choose the driver to install Choose this option to select the device driver from a list Windows does not guarantee that the driver you choose will be the best match for your hardware Hardware Installation The software you are installing for this hardware Olimex Virtual COM MOD RFID125 BOX has not passed Windows Logo testing to verify its compatibility with Windows XP Tell me why this testing is important Continuing your installation of this software may impair or destabilize the correct operation of your system either immediately or in the future Microsoft strongly recommends that you stop this installation now and contact the hardware vendor for software that has passed Windows Logo testing Continue Anyway STOP installation Found New Hardware Wizard Completing the Found New Hardware Wizard The wizard has finished installing the software for F Olimex Virtual COM MOD RFID125 BOX Click Finish to close the wizard Finish j Linux distributions normally include drivers both for USB HID and USB CDC classes Depending on which driver is loaded i
10. rade section for more information PC DRIVER INSTALLATION Drivers for the USB HID mode are integrated in Windows XP Vista The driver for USB CDC mode is available from our website Windows installation steps are the following 1 Download and unzip the file MOD RFID125 drivers zip in a temporary directory 2 Plug the programmer in the USB port 3 Point the Device Wizard to the temporary directory 4 Windows will complain that drivers are not signed Click Continue 5 Click finish Screen shots of the steps are shown below Found New Hardware Wizard Welcome to the Found New Hardware Wizard Windows will search for current and updated software by looking on your computer on the hardware installation CD or on the Windows Update Web site with your permission Read our privacy policy Can Windows connect to Windows Update to search for software Yes this time only Yes now and every time connect a device Click Next to continue Found New Hardware Wizard This wizard helps you install software for Olimex Virtual COM MOD RFID125 BOX if your hardware came with an installation CD or floppy disk insert it now What do you want the wizard to do O Install the software automatically Recommended s Click Next to continue lt Back Next gt Cancel Found New Hardware Wizard Please choose your search and installation options ae Ss Search f
11. s Just open the serial port assigned to MOD RFID125 using HyperTerminal or similar terminal program and start typing commands For the impatient type and press enter to see a short help for the supported commands Any typed character will be echoed back enter will force the module to process the input command line 1 Command This command prints a short help message describing the available commands and their arguments 2 Command i This command prints a short information about firmware version hardware board revision and currently selected configuration 3 Command b This command forces the device to enter boot loader mode After executing this command the device will disconnect itself from USB switch to boot loader mode and reconnect itself in anticipation of receiving a firmware upgrade image See the section Firmware Upgrade for more information 4 Command r This command is only valid if device is in single read mode see below It will trigger a single TAG read If TAG ID is successfully read it will be printed Otherwise if operation timed out zeros will be printed 5 Command msXX Set single read mode The XX parameter must be a decimal value indicating the TAG read timeout in seconds Example setting single read mode with 15 seconds timeout ms15 6 Command mcFR Set continuous read mode with frequency F Hz and repeat report interval R seconds Both F and R must be single digit decimal numb
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