EasyRFIDkit_e121202

Easy RFID Education kit documentation 1

1. Kit Contents

1. i-Stamp2P module board x 1

2. JX-2P plus Project board x 1

3. UCON-4 USB download cable x 1

4. RFID reader serial board x 1

5. 400-point Breadboard x 1

6. DC adaptor +12Vdc 500mA x 1

7. #22 AWG hook up wire set x 1

8. IDC1MF wire set (5-wire mix color) x 1

9. IDC1FF wire set (5-wire mix color) x 1

10. LCD16x2 with cable x 1

11. Documentation x 1

12. CD-ROM x 1

13. Experiment component set

10.1 Resistor 1/4W 220 x 8

10.2 Resistor 1/4W 510 x 16

10.3 Resistor 1/4W 1k x 4

10.4 Resistor 1/4W 2.2k x 2

10.5 Resistor 1/4W 4.7k x 6

10.6 Resistor 1/4W 10k x 5

10.7 Capacitor 15pF 50V ceramic x 2

10.8 Capacitor 0.1F 50V ceramic x 2

10.9 Capacitor 10F 16V electrolytic x 1

10.10 Diode 1N4148 x 2

10.11 LED 3mm. Red x 16

10.12 Tact switch x 4

10.13 Piezo Speaker 32 x 1

10.14 RFID Rectangle Tag x 1

10.15 RFID 50mm Round Tag x 1

Easy RFID Education kit

2 Easy RFID Education kit documentation

2. Main hardware information summary

2.1 i-Stamp2P microcontroller board

Features are compatible with the BASIC Stamp 2P 40 module (BS2P40-IC)

20MHz clock frequency. Operate up to 12,000 P-BASIC command/second

16KByte memory, separate 8 sections, 2KByte/each, erasable 100,000+ times

32 byte RAM with 64 byte Scratchpad RAM

Consumption of 65mA in full operation and 200A in sleep mode

Connecting to PC’s serial port for programming and debuging

32 I/O, freedom separeted work or set in groups from 4, 8 and 16 pins

30mA/30mA source/sink current. Maximum 60mA/60mA source/sink current

per 8-pins groups (P0-P7/P8-P15/A0-A7/A8-A15)

LED power status

Board sizes 2.25" x 1.5"

Develop with BASIC Stamp Editor program

2.2 JX-2P plus Project board

Socket for i-Stamp2P (OEM BASIC Stamp2P40)

RJ-11 female connector for downloading and communication

+5V power supply on board

Free 24 of i-Stamp2P port (P0 to P15 and A0 to A7)

Provides in 3-pin JST connector for P0 to P7

3 of RC servo motor port (P13 to P15)

LCD module interfacing with brightness adjustment (LCD module 16x2 with

cable is optional) connected with A9 to A15 of i-Stamp2P port.

DS18B20 1-wire Temperature sensor IC on-board (A8 port)

Prototype area 8.5x5.5 cm. with 200 soldering pad both 100mil (2.54mm.) spacing

and 80mil (2.0mm.) spacing. Support the small beadboard (optional - sold sold separated)

Board size 9.5 x 13 cm.

2 of power supply terminals

- For i-Stamp2P and any interfacing circuit; use the external power suypply

such as DC adpator or battery 6 to12V 500mA (not include), on-board polarity protection

circuit. Include the power switch and LED indicator.

- For the servo motor; support 4.8 to 6Vdc. Use 2-pin terminal block and

have the power swith with LED indicator.

Use with DC adaptor +12V 500mA, on-board polarity protection circuit.


TX

RX

ATN

GND

P0

P1

P2

P3

P4

P5

P6

P7

1

2

3

4

5

6

7

8

9

10

11

12

40

39

38

37

36

35

34

33

32

31

30

29

GNDRES

+5V

A14

A13

A12A11

A10

A9

A8

P8

P9

P10

18

19

20

28

27

26

25

24

23

22

21

A7

A6

A5

A4

A3

A2

A1

A0

13

14

15

16

17

P11P12

P13P14

P15

A15

Figrure 1 : i-Stamp2P pin assignment

PIN NAME FUNCTION

Tx/SOUT1 Serial Out:connects to PC serial port RX pin(DB9 pin 2) for programming.

Rx/SIN2 Serial In:connects to PC serial port TX pin(DB9 pin 3) for programming.

ATN3 Attention:connects to PC serial port DTR pin(DB9 pin 4) for programming.

VSS/GND4 System ground: (same as pin 23)connects to PC serial port GNDpin (DB9 pin 5) for programming.

P0-P155-20 P0-P15 General-purpose I/O pins

+5V37 5-volt DC input

RES38 Reset input/output: goes low

Vss/GND39 System ground

N/A40 Not use

A0-A1521-36 A0-A15 General-purpose I/O pins

3. Introduction to i-Stamp2P microcontroller

i-Stamp2P is the emulator of BS2P40-IC module which is designed by Innovative

Experiment Co.,Ltd., Thailand under the co-operation with Parallax Inc., manufacturer BASIC

Stamp from USA.

The size is different from BS2P40-IC. i-Stamp2P requires 40-pin female header to fit on

the board. The i-Stamp2P use BASIC Stamp interpreter licenced by Parallax Inc.

Figure 1, shows i-Stamp2P pin assignment. It’s similar to BS2P40-IC. The only one

different is i-Stamp2P no Vin pin because inside i-Stamp2P has not +5V regulator circuit.

Figure 2 shows the schematic of i-Stamp2P.

The heart of circuit is IC1 SX-48AC microcontroller. Inside this microcontroller

contains PBASIC2P interpreter firmware. The users have already written PBASIC. The

program is downloaded into i-Stamp2P via serial port.

Opearing program is stored to IC2 which is 16KByte serial EEPROM 24LC128. It

means IC2 is the system memory program.

i-Stamp2P need +5V and at least 65mA supply from regulator. Users can just connect

+5V and ground to i-Stamp2P and start working on it.


9

10

1213

8

3

1

5

4

16 2

+5V

IC1MAX232 C3

C2

C1

SOUT7

SIN

ATN

GND

5

19

2

3

+5V

427

26

25

24

23

22

21

20

17

16

15

14

13

12

11

10

IC2SX48AC

BASIC Stamp 2PInterpreter

9

8

1RxD

TxD

MCLR

R24k7

R14k7

D11N4148

C1-C510/25V

CR1Ceramic

Resonator20MHz

615C4

6

76

5A2

1

2

38

4

SDA

SCL

SDA

SCLA1

A0

IC324LC128

R44k7

+5V

C60.1/63V

45

44

43

42

41

40

39

38

37

36

35

34

31

30

29

28

A15

A14

A13

A12

A11

A10

A9

A8

A7

A6

A5

A4

A3

A2

A1

A0

32

P15

P14

P13

P12

P11

P10

P9

P8

P7

P6

P5

P4

P3

P2

P1

P0

20

19

18

17

16

15

14

13

12

11

10

9

8

7

6

5

36

35

34

33

32

31

30

29

28

27

26

25

24

23

22

21

33

47

18

46

37+5V

RESET

1

2

3

4

38

39GND

R3150

Figrure 2 : i-Stamp2P schematic diagram


30

29

28

27

26

25

24

23

22

21

20

19

18

17

16

15

14

13

12

11

10

9 8 7 6 5 4 3 2 1

30

29

28

27

26

25

24

23

22

21

20

19

18

17

16

15

14

13

12

11

10 9 8 7 6 5 4 3 2 1

ab

cd

ef

gh

ij

++

--

i-Stamp2PBASIC Stamp2P

LCD: A9-E,A10-RWA12-15 D4-D7A11-RS

Vin

POWER

ON

ON

OEM Board

C op yr i gh t 2002 by I nnov a t i v e E x pe r i m en t

0A0A1A2A3A4A5A6A7RESET +5V

-P0+

JX

-2P

plu

si-S

tam

p2

P P

roje

ct b

oa

rd

-P1+ -P2+ -P3+ -P4+ -P5+ -P6+ -P7+

1 2 3 4 5 6 7 8 9 101112131415 GND

A8:

DS

18B

20

+Vs

+V

s

Vs

P13 P12 P11

LCD moduleconnector

To PC serial port

DC jack

Battery terminal formain circuit

LCD brightness

RC servosupplyterminal

Power switchfor servomotor supply

Servo port

DS18B20

Prototypearea

P0 to P7 port with 3-pin of JST connector

RESETswitch

Powerswitch

Figrure 3 : JX-2P plus board layout; +5V is +5V regulated supply for main

circuit, GND is system ground and +Vs is RC servo motor supply voltage. The

i-Stamp2P is optional component (sold seprated)


Figure 2 : JX-2P plus i-Stamp2P Project board schematic

~~

+

-

IC12940-5.0

+5V

R1510

LED1POWER

K1RS-232

(RJ-11 female)+5V

+Vm

+Vin6-16V

+Vin7.5-16V

SW1POWER

C1220F25V

C20.1F63V

C30.1F63V

C447F16V

P13+VmGND

P14+VmGND

P15+VmGND

SERVO PORT

J2P1

J3P2

J4P3

J5P4

J6P5

J7P6

J8P7

J1P0

i-Stamp2PPORT

K4DC input

K3Batteryinput

BD11A50V

i-Stamp2PSocket

1

2

3

4

38

37

A15 A9 A8 A7 A6 A5 A4 A3 A2 A1 A0A14 A13 A12 A11 A10S1

RESET

P15 P9 P8 P7 P6 P5 P4 P3 P2 P1 P0P14 P13 P12 P11 P10

39

C50.1/50V

36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5

P0P1P2P3P4P5P6P7P8P9P10P11P12P13P14P15A0A1A2A3A4A5A6A7

+5V

R22k2

IC2DS18B20

+5V

+5V

RW

RS

E

D5

D7

D4

D6

K2UIC-LCD

VR1BRIGHT.

+5V

+5V

GND

PORT

MCU port

C70.1/50V

C60.1/50V

1

2

3

GNDDQ +V

DS18B20

+Vm+Vm6-7.2V

C82200F

10V

K5SERVOsupply

SW2SERVO_POWER

R31k

LED1POWER

TxD

RxD

DTR

4. Inside JX-2P plus : i-Stamp2P Project board

JX-2P plus is the microcontroller project board that has become a standard for

students, hobbyists, and even professional engineers. The board includes everything

you need to get started with microcontroller applications at minimal expense . Just add

your external circuits, code, and imagination. You can interface all components very

easily. With the help of PBASIC programming you can understand about microcontroller

interfacing concepts.

Figure 3 shows the physical of JX-2P plus board and its schematic is shown in figure

4. SK1 is the 40-pin female header for support i-Stamp2P. +5V regulated voltage supply is

connected to pin 21 of i-Stamp2P. Pin 22 connects with RESET switch to reset the operation

of i-Stamp2P. For interfacing with serial port, use pin 1 to 4 connect with RJ-11 serial


connector. These interface are used for downloading and debugging via Debug

Terminal in BASIC Stamp editor software.

Some components are connected with i-Stamp2P auxiliary port. It includes LCD

module and DS18B20 1-wire Temperature sensor. LCD module are assigned to connect

with A9 to A15 port and A8 is connected with DS18B20.

The JX-2P plus board supoprts the optiional power supply for high power circuit

such as DC motor and Servo motor. +Vm is terminal for connecting with Motor supply

voltage. The 6 to 7.2Vdc voltage is suitable for RC servo motor. Addition, the JX-2P plus

board provides 3 servo ports. They are connected with P13, P14 and P15 of the main i-

Stamp2P port. User can connect the servo motors direct to these connectors. If would

not to use servo motor, +Vm terminal can support another DC power supply up to 9Vdc

for supporting 4.5 to 9Vdc DC motors and small relays.

5. UCON-4 USB download cable driver installation

Preparation of this kit requires the USB driver installation for UCON-4 download

cable. Double click at the USBDriverInstallerV2.x.x.exe (x.x is number of version) file

from the bundled CD-ROM to start the driver instalation. The installation dialogue-box will

appear below.

Next, check the USB serial port address

(1) Plug the UCON-4 cable to USB port. Wait a moment. Windows will be detect

and prepare the suitable driver for this cable.

(2) Check the Virtual COM port or USB Serial port address by clicking Start

Control Panel System Hardware Device Manager


(3) See the list of USB serial port and remember the COM port address to work

with UCON-4 cable. Normally it will create COM3 or higher. In this example is COM4

6. Software tools

i-Stamp2P can work on the JX-2P plus Project board with BASIC Stamp editor

software V2.39 or higher. This is free for download at www.parallax.com or see in the

CD-ROM which bundled in the Easy RFID education kit.

You can see after software installation, how to use and PBASIC command reference

from BASIC Stamp editor manual V2.0 or higher. This is free for download at

www.parallax.com.


7. Getting start, Step by step

(7.1) Put i-Stamp2P intothe 40-pin female header on the JX-2P plus board. You must

put it in the right direction as shown in figure below.

(7.2) Connect the UCON-4 cable between the PC’s USB port and the JX-2P plus

board.

(7.3) Plug in the DC adaptor or 4 of AA battery pack for supplying voltage to the

JX-2P plus Experiment board. Open the BASIC Stamp Editor software.

(7.4) Check the communication between i-Stamp2P and the BASIC Stamp Editor

software by pressing on the Ctrl I key or by clicking on the Identify button or by entering

the RUN menu and then selecting Identify

If all is done correctly,the Identification box will appear and show the version

of PBASIC2SP chip as shown in the figure below. Observe COM4 box, it will show BASIC

Stamp2P V1.x (x is any number). Now i-Stamp2P can connect with the BASIC Stamp Editor

software.


(7.5) Make a simple program for testing.

(7.5.1) Select the BASIC Stamp type by BASIC Stamp directive. Enter the

Directive menu and select Stamp BS2P. The message ‘{$STAMP BS2P} appears on first

line. Press the Enter key.

(7.5.2) At the Directive menu, select serial port by Port Com4 (or any

Com port that connect). Messge ‘{$PORT COM4} will appear at the second line. Pess

Enter.

(7.5.3) At Directive menu, select the version of PBASIC language by PBASIC

Version2.5. Message ‘{$PBASIC 2.5} will appear at the third line. Press Enter

(7.5.4) At programming area, type debug “welcome”. This short code i-

Stamp2P send massage welcome to display on Debug Terminal of BASIC Stamp Editor.

Press Enter.

(7.5.5) Click Run button. Debug Terminal will appears and show message

“welcome” on the screen.

(7.5.6) Press the RESET switch on the JX-2P plus board. The Debug Terminal

screen repeats to show the same message. Because the RESET switch pressing means

re-start the program running.

(7.5.7) If dialogue box below is appeared, it means The communication

between computer and i-Stamp is unsuccessful.


Check the UCON-4 cable and the status of USB serial port (created by

Virtual COM port driver). This cable is used to connect between the computer’s USB

port and the JX-2P plus board. The cable’s end uses a Modular plug RJ-11 6P4C (6-pins

form and 4-contacts) Its Length is 1.5 meters approximation. The cable assignment is shown

in the diagram below.

MCU_TxD

MCU_RxD

MCU_DTRGND

This cable requires +5V from USB port and support USB 1.0/2.0. User can set the

baudrate up to 115,200 bit per second. Requires the driver installation before using.

(7.5.8) All experiment PBASIC code of i-Stamp2P must be save in the

filename extension .bsp


8. BASIC Stamp2P with starter experiment

8.1 Running light

P15

P14

P13

P12

P11

P10

P9

P8

P7

P6

P5

P4

P3

P2

P1

P0

i-Stamp2P

R16

R15

R14

R13

R12

R11

R10

R9

R8

R7

R6

R5

R4

R3

R2

R1

R1-R16510

LED16

LED15

LED14

LED13

LED12

LED11

LED10

LED9

LED8

LED7

LED6

LED5

LED4

LED3

LED2

LED1

'******************************************

' Connect P0-P15 to LED monitor

'******************************************

' {$STAMP BS2p}

' {PBASIC 2.5}

X1 var NIB

DIRS = $FFFF

LOOP1 :

outs = $0001

for X1 = 0 to 15

pause 500

outs = OUTS << 1

next

goto LOOP1


FREQOUT generates one or two sine waves using a pulse-width modulation

algorithm. The circuits in the figure below work by filtering out the high-frequency

PWM used to generate the sine waves. FREQOUT works over a very wide range of

frequencies so at the upper end of its range.

'**********************************************************

' Program : note.bsp

' Make melody sounds on speaker

' Hardware : Connect Speaker to P0

'**********************************************************

'{$STAMP BS2p}

FREQ VAR WORD ' Define Byte variable to keep frequency

I VAR BYTE ' Define Byte variable to keep loop counter

C CON 278 ' Note C Frequency

D CON 312 ' Note D Frequency

E CON 350 ' Note E Frequency

F CON 370 ' Note F Frequency

G CON 416 ' Note G Frequency

A CON 467 ' Note A Frequency

B CON 524 ' Note B Frequency

C1 CON 555 ' Note C1 Frequency

OUTPUT 0

LOOP1:

FOR I=0 TO 7

LOOKUP I,[C,D,E,F,G,A,B,C1],FREQ ' Read table 8 notes

FREQOUT 0,1887,FREQ ' Make melody with duration 0.5 sec

PAUSE 100 ' Delay 100 ms.

NEXT

PAUSE 1000

GOTO LOOP1 ' Goto loop

8.2 Playing Note

P0

SP1PIEZO

i-Stamp2P+

-

C110F


8.3 LCD Experiment

16x2 LCD module with cable

4 of AA battery or DC adaptor

The three LCD commands (LCDCMD, LCDIN and LCDOUT) allow the BS2p, BS2pe, or

BS2px or i-Stamp2P to interface directly to standard LCD displays that feature a

Hitachi 44780 controller (part #HD44780A). This includes many 1 x 16, 2 x 16, and 4

x 20 character LCD displays.

The Hitachi 44780 LCD controller supports a number of special instructions for

initializing the display, moving the cursor, changing the default layout, etc. The

LCDCMD command is used to send one of these instructions to the LCD. It is most

commonly used to initialize the display upon a power-up or reset condition. Note

that LCDCMD, LCDIN and LCDOUT use a 4-bit interface to the LCD which requires a

specific initialization sequence before LCDIN and LCDOUT can be used. Specifics

on the initialization sequence will follow.


'****************************************************************************************

' Program: Show message ON LCD Module 16x2

' Filename : lcd16x2.bsp

' Using 4 Bit mode interface, Connect D4-D7 TO A12-A15, RS TO A11, R/W TO A10 AND'E TO A9

'****************************************************************************************

' {$STAMP BS2p}

' {$PBASIC 2.5}

' {$PORT COM1}

LCD_ PIN 9

CHAR VAR Byte(16)

Init_LCD:

AUXIO

PAUSE 1000 ' allow LCD to power-up

LCDCM LCD_, 48 ' Send wake-up sequence (3x)

PAUSE 5

LCDCMD LCD_, 48

PAUSE 1

LCDCMD LCD_, 48

PAUSE 1

LCDCMD LCD_, 32 ' Set data bus to 4-bit mode

LCDCMD LCD_, 40 ' Set 2-line mode with 5x8 font

LCDCMD LCD_, 8 ' Turn display off

LCDCMD LCD_, 12 ' Turn display on without cursor

LCDCMD LCD_, 6 ' Auto-increment cursor

LCDCMD LCD_, 1 ' Clear the display

Start:

LCDOUT LCD_,1,["Hello!"]

GOSUB ReadLCDScreen

PAUSE 3000

LCDOUT LCD_,1,["I'm a 2x16 LCD!"]

GOSUB ReadLCDScreen

PAUSE 3000

GOTO Start

ReadLcdScreen:

DEBUG "LCD NOW Says:"

LCDIN LCD_,128,[STR CHAR\16]

DEBUG STR char\16,CR,CR

RETURN


8.4 The 1-Wire Temperature sensor

DS18B20

Connect to thecomputer's serial port

4 of AA Battery orconnect to DC adaptor

The DS18B20 Digital Thermometer provides 9 to 12–bit centigrade temperature

measurements and has an alarm function with nonvolatile user-programmable

upper and lower trigger points. The DS18B20 communicates over a 1-Wire bus that

by definition requires only one data line (and ground) for communication with a

central microprocessor. It has an operating temperature range of –55°C to +125°C

and is accurate to ±0.5°C over the range of –10°C to +85°C.

The 1-Wire protocol is a form of asynchronous serial communication developed by

Maxim/Dallas Semiconductor. It only requires one I/O pin and that pin can be

shared between multiple 1-Wire devices. The OWIN, OWOUT command allows the i-

Stamp2P to receive data from a 1-Wire device.


' ***************************************************' Filename : ds18b20.bsp' Simple PC thermometer

' ***************************************************

'{$STAMP BS2p}

' {$PBASIC 2.5}

' {$PORT COM1}

Temp VAR Word 'Holds the temperature value

TH VAR Byte

TL VAR Byte

Config VAR Byte

Reserved1 VAR Byte

Reserved2 VAR Byte

Reserved3 VAR Byte

CRC VAR Byte

Point VAR Byte

x VAR Word

Start:

AUXIO

OWOUT 8, 1, [$CC, $44] 'Send Calculate Temperature command

CheckForDone: 'Wait until conversion is done

PAUSE 25

OWIN 8, 4, [Temp] 'Here we just keep reading low pulses until

IF Temp = 0 THEN CheckForDone 'the DS1820 is done, then it returns high.

OWOUT 8, 1, [$CC, $BE] 'Send Read ScratchPad command

OWIN 8, 2, [Temp.LOWBYTE,Temp.HIGHBYTE,TH,TL,Config]

' Format Data

' S S S S S B6 B5 B4 : B3 B2 B1 B0 B-1 B-2 B-3 B-4

' Convert LowByte To Point

Temp = Temp & $0FFF

DEBUG DEC temp/16,"."

x =(Temp << 4) & $00ff

x = 10000 */ x

DEBUG DEC4 x,CR

GOTO start

This PBASIC code demostrate the reading temperature from DS18B20 on the JX-2P

plus board to display on the Debug Terminal of BASIC Stamp editor.


9. RFID Technology Overview

Material in this section is based on information provided by the RFID Journal (www.rfidjournal.com).

Radio Frequency Identification (RFID) is a generic term for non-contacting

technologies that use radio waves to automatically identify people or objects. There

are several methods of identification, but the most common is to store a unique serial

number that identifies a person or object on a microchip that is attached to an antenna.

The combined antenna and microchip are called an "RFID transponder" or "RFID tag"

and work in combination with an "RFID reader" (sometimes called an "RFID interrogator").

An RFID system consists of a reader and one or more tags. The reader's antenna

is used to transmit radio frequency (RF) energy. Depending on the tag type, the energy

is "harvested" by the tag's antenna and used to power up the internal circuitry of the

tag. The tag will then modulate the electromagnetic waves generated by the reader in

order to transmit its data back to the reader. The reader receives the modulated waves

and converts them into digital data.

There are two major types of tag technologies. "Passive tags" are tags that do

not contain their own power source or transmitter. When radio waves from the reader

reach the chip’s antenna, the energy is converted by the antenna into electricity that

can power up the microchip in the tag (typically via inductive coupling). The tag is then

able to send back any information stored on the tag by modulating the reader’s

electromagnetic waves. "Active tags" have their own power source and transmitter.

The power source, usually a battery, is used to run the microchip's circuitry and to

broadcast a signal to a reader. Due to the fact that passive tags do not have their own

transmitter and must reflect their signal to the reader, the reading distance is much

shorter than with active tags. However, active tags are typically larger, more expensive,

and require occasional service.

Frequency refers to the size of the radio waves used to communicate between

the RFID system components. Just as you tune your radio to different frequencies in

order to hear different radio stations, RFID tags and readers must be tuned to the same

frequency in order to communicate effectively. RFID systems typically use one of the

following frequency ranges: low frequency (or LF, around 125 kHz), high frequency (or

HF, around 13.56 MHz), ultra-high frequency (or UHF, around 868 and 928 MHz), or

microwave (around 2.45 and 5.8 GHz).

The read range of a tag ultimately depends on many factors: the frequency of

RFID system operation, the power of the reader, and interference from other RF devices.

Balancing a number of engineering trade-offs (antenna size v. reading distance v. power

v. manufacturing cost), the Parallax RFID Card Reader's antenna was designed specifically

for use with low-frequency (125 kHz) passive tags with a read distance of around 4 inches.


10. About Parallax RFID reader - Serial

Designed in cooperation with Grand Idea Studio (www.grandideastudio.com),

the Parallax Radio Frequency Identification (RFID) Card Readers provide a low-cost

solution to read passive RFID transponder tags up to 4 inches away. The RFID Card

Readers can be used in a wide variety of hobbyist and commercial applications,

including access control, user identification, robotics navigation, inventory tracking,

payment systems, car immobilization, and manufacturing automation.VCC

/EN

ABLE

SO

UT

GN

D

GRAN

Did

ea

studio

10.1 Features

Low-cost method for reading passive, 125 kHz RFID transponder tags

Serial interface for microcontrollers

Bi-color LED for visual indication of status


10.2 RFID Compatibility

The Parallax RFID Card Reader works exclusively with the EM Microelectronics

EM4100-family of passive read-only transponder tags. Each transponder tag contains a

unique, read-only identifier (one of 240, or 1,099,511,627,776 possible combinations).

10.3 Connections (Serial)

The Parallax RFID Card Reader Serial version easily interfaces to any host

microcontroller using only four connections (VCC, /ENABLE, SOUT, GND).

Pin Pin Name Type Function

1 VCC powerSystem power.+5Vdc input.

2 /ENABLE inputModule enable pin. Active LOW digital input.Bring this pin LOW to enable the RFID reader andactivate the antenna.

3 SOUT outputSerial output to host.TTL-level interface, 2400 bps, 8 data bits, no parity,1 stop bit.

4 GND powerSystem ground.Connect to power supply’s ground (GND) terminal.

Use the following example circuit for connecting the Parallax RFID Card Reader:

+5V

OUT

OE VCC/ENABLESOUTGND

GRANDidea studio


10.4 Usage

A visual indication of the state of the RFID Card Reader is given with the on-

board LED. When the module is successfully powered-up and is in an idle state, the LED

will be GREEN. When the module is in an active state searching for or communicating

with a valid tag, the LED will be RED.

The RFID Card Reader Serial is activated via the /ENABLE pin on the module’s 4-

pin header. When the RFID Card Reader is powered and /ENABLE is pulled LOW, the

module will enter the active state. When /ENABLE is pulled HIGH or left unconnected,

the module will enter the idle state.

The face of the RFID tag should be held parallel to the front or back face of the

antenna (where the majority of RF energy is emitted). If the tag is held sideways (for

example, perpendicular to the antenna), you’ll either get no reading or a poor reading

distance. Only one transponder tag should be held up to the antenna at any time. The

use of multiple tags at one time will cause tag collisions and the reader may not detect

any of them. The tags available in the Parallax store have a read distance of

approximately 4 inches. Actual distance may vary slightly depending on the size of the

transponder tag and environmental conditions of the application.

10.5 Communication Protocol

All communication is 8 data bits, no parity, 1 stop bit, and least significant bit first

(8N1) at 2400 bps. The RFID Card Reader Serial version transmits data as 5V TTL-level, non-

inverted asynchronous serial.

When the RFID Card Reader is active and a valid RFID transponder tag is placed

within range of the activated reader, the tag’s unique ID will be transmitted as a 12-byte

printable ASCII string serially to the host in the following format:

Start Byte(0x0A)

Unique IDDigit 1

Unique IDDigit 2

Unique IDDigit 3

Stop Byte(0x0D)

Unique IDDigit 4

Unique IDDigit 5

Unique IDDigit 6

Unique IDDigit 7

Unique IDDigit 8

Unique IDDigit 9

Unique IDDigit 10

The start byte and stop byte are used to easily identify that a correct string has

been received from the reader (they correspond to line feed and carriage return

characters, respectively). The middle ten bytes are the actual tag's unique ID. For

example, for a tag with a valid ID of 0F0184F07A, the following bytes would be sent:

0x0A, 0x30, 0x46, 0x30, 0x31, 0x38, 0x34, 0x46, 0x30, 0x37, 0x41, 0x0D.


11. RFID basic experiment with i-Stam2P(BASIC Stamp2P40 OEM board)

11.1 Component list

1. RFID reader Serial version

2. RFID tag card

3. RFID tag circle

4. i-Stamp2P with JX-2P plus project board

5. UCON-4 download cable

6. IDC1MF 4 wires

7. 16x2 LCD module with cable

8. DC adaptor (+6 to +12Vdc 500mA)

11.2 Experiment 1 : Simple reading the RFID tag

(1.1) Connect RFID reader with the JX-2P plus board following figure 11-1

- Connect the /Enable pin of the RFID reader with P0 of i-Stamp2P

- Connect the SOUT pin of the RFID reader with P1 of i-Stamp2P

- Connect the VCC pin of the RFID reader with +5V on JX-2P plus board

- Connect the GND pin of the RFID reader with GND or Ground of the JX-2P

plus board

(1.2) Open the BASIC Stamp editor


VCC

/EN

ABLE

SO

UT

GN

D

GRAN

Did

ea s

tudio

+5V A7A6A5A4A3A2A1A0 0 1 2 3 4 5 6 7 8 9 1011 121314 15 GND

+Vs

DS18B20

Vs

ON

+Vs

P13 P12 P11

RESET

POWER

Vin+ON

6-12Vdc SERIA

L

LCD : A9-E, A10-RW,A12-A15 D4-D7A11-RS

Connect to thecomputer's USB portvia UCON-4 cable

+12Vdcadaptor

P1P0

Figure 11-1 : RFID reader experiment 1 connection diagram


(1.3) Type the code following List 11-1

(1.4) Download the code to i-Stamp2P by clicking the RUN button or press the key

CTRL+R.

The Debug Terminal is opened. Choose the interfaced COM port.

(1.5) Place the RFID tag card over the RFID reader at antenna side. See the results

on the Debug Terminal window

The Debug Terminal displays the ID of RFID tag below :

VCC

/EN

ABLE

SO

UT

GN

D

GRA

ND

idea s

tudio

RFID tagFront side

' {$STAMP BS2p}

' {$PBASIC 2.5}

char_rfid VAR Byte (10) ' Declare the ID variable 10 bytes

Main:

LOW 0 ' Force Enable pin as low

SERIN 1, 1021, [WAIT($0A),STR char_rfid\10]

' Read data from RFID reader from P1

' and store 10-byte of ID to the char_rfid array variable.

' The first byte must be 0A

Show_Tag:

DEBUG "Tag ID: ", STR char_rfid ' Show ID on the Debug Terminal

DEBUG CR ' Next line

PAUSE 1000

GOTO Main ' Do again

END

Listing 11-1 : RFID_ReadTerminal.bsp; Read the RFID tag card to show on

the Debug terminal


(1.6) Change the RFID tag card to RFID tag circle and try again following the step

(1.5)

VCC

/EN

ABLE

SO

UT

GN

D

GRAN

Did

ea s

tudio

VCC

/EN

ABLE

SO

UT

GN

D

GRAN

Did

ea s

tudio


11.3 Experiment 2 : Simple reading the RFID tag to show on LCD

(2.1) Connect RFID reader with the JX-2P plus board following figure 11-2

- Connect the /Enable PIN of the RFID reader with P0 of i-Stamp2P

- Connect the SOUT PIN of the RFID reader with P1 of i-Stamp2P

- Connect the VCC of the RFID reader with +5V on JX-2P plus board

- Connect the GND of the RFID reader with GND or Ground of the JX-2P plus

board

(2.2) Plug the LCD module with cable to LCD connector on the JX-2P plus board


VCC

/EN

ABLE

SO

UT

GN

D

GRA

ND

idea

studio

+5V A7A6A5A4A3A2A1A0 0 1 2 3 4 5 6 7 8 9 1011 12131415 GND

+Vs

DS18B20

Vs

ON

+Vs

P13 P12 P11

RESET

POWER

Vin+ON

6-12Vdc SER

IAL


+12Vdcadaptor

P1

Connect toLCD16x2

P0



(2.4) Type the code following Listing 11-2


CTRL+R.


on the LCD module screen.

The LCD module will show the ID below on the line 1 :

0414E50079

(2.7) Change the RFID tag card to RFID tag circle and try again following the step

(2.6)

' {$STAMP BS2p}

' {$PBASIC 2.5}

char_rfid VAR Byte (10)

LOW 0 ' Send “0” to Enable pin of RFID reader

AUXIO ' Change to AUX port

Init_LCD:

PAUSE 1000

LCDCMD 9, %00110000 ' Initial LCD

PAUSE 5

LCDCMD 9, %00110000

PAUSE 0

LCDCMD 9, %00110000

PAUSE 0

LCDCMD 9, %00100000 ' Set data bus to 4-bit mode

LCDCMD 9, %00101000 ' Set to 2-line mode with 5x8 font

LCDCMD 9, %00001100 ' Display on without cursor

LCDCMD 9, %00000110 ' Auto-increment cursor

LCDCMD 9, %00000001 ' Clear the display

Main:

MAINIO ' Switch to Main port

SERIN 1, 1021, [WAIT($0A),STR char_rfid\10]

' Read data from RFID reader from P1

' and store 10-byte of ID to the char_rfid array variable.

' The first Byte must be 0A

AUXIO ' Switch to AUX port

LCDOUT 9, 1, [STR char_rfid] ' Show ID on LCD screen

GOTO MAIN

END

Listing 11-2 : RFID_ReadLCD.bsp; Read the RFID tag card and display on the

16x2 LCD module


11.4 Experiment 3 : Test range reading of the RFID reader withany direction

(3.1) Still use the connection diagram of figure 11-3 and using the code from Listing

11-3


(3.3) Type the code following Lisiting 11-3


CTRL+R.

12345678910

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

fg

hi

je

dc

ba

12345678910

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

++

fg

hi

je

dc

ba

VCC

/EN

ABLE

SO

UT

GN

D

GRAN

Did

ea s

tudio

+5V A7A6A5A4A3A2A1A0 0 1 2 3 4 5 6 7 8 9 1011 121314 15 GND

+Vs

DS18B20

Vs

ON

+Vs

P13 P12 P11

RESET

POWER

Vin+ON

6-12Vdc SERIA

L


+12Vdcadaptor

P1

Connect toLCD16x2

P0

10F

piezo speaker



GND

P0

P1

A9

A10

A11

A12

A13

A14

A15

D0 D1 D2 D3 D4 D5 D6 D7

7 8 9 10 11 12 13 14

E

RW

RS

+V

Vo

G

+5V

VR110k

P4

C110F

SP1PIEZO

SPEAKER

i-Stamp2P

+5V

VCC

EN

ABLE

SO

UT

RFID reader6

5

4 1

3

2

'*************************************************************' RFID_ReadTest.bsp' Detect and read RFID tag and drive sound with piezo speaker'*************************************************************' {$STAMP BS2p}' {$PBASIC 2.5}char_rfid VAR Byte (10)LOW 0 ' Send "0" to Enable pin of RFID readerAUXIO ' Change to AUX portInit_LCD: PAUSE 1000 LCDCMD 9, %00110000 ' Initial LCD PAUSE 5 LCDCMD 9, %00110000 PAUSE 0 LCDCMD 9, %00110000 PAUSE 0 LCDCMD 9, %00100000 ' Set data bus to 4-bit mode LCDCMD 9, %00101000 ' Set to 2-line mode with 5x8 font LCDCMD 9, %00001100 ' Display on without cursor LCDCMD 9, %00000110 ' Auto-increment cursor LCDCMD 9, %00000001 ' Clear the displayMain:MAINIOSERIN 1, 1021, [WAIT($0A),STR char_rfid\10]FREQOUT 4,1000,1000 ' Output sound on port 4AUXIO ' Switch to AUX portLCDOUT 9, 1, [STR char_rfid] ' Show ID on LCD screenPAUSE 2000GOTO Main

END

Listing 11-3 : RFID_ReadTest.bsp; Read the RFID tag card to show on the

16x2 LCD module and drive a beep signal.

Figure 11-4 : RFID reader experiment 3 schematic diagram



on the LCD module screen.

VCC

/EN

ABLE

SO

UT

GN

D

GRAN

Did

ea s

tudio

RFID tagFront side

The LCD module will show the ID below on the line 1 :

0414E50079

and the piezo speaker drives a beep signal on every reading.

(3.6) Place the RFID tag circler over the RFID reader at antenna side. See the

results on the LCD module screen.

VCC

/EN

ABLE

SO

UT

GN

D

GRAN

Did

ea s

tudio

The LCD module will show the ID of RFID tag circle (must different the

RFID tag card) below on the line 1 :

0F02A68691

and the piezo speaker drives a beep signal on every reading.


(3.7) Back to use the RFID tag card. Move the card far from RFID reader until

does not detect the RFID tag. Record the distance.

VCC

/EN

ABLE

SO

UT

GN

D

GRAN

Did

ea s

tudio

RFID tagFront side

Antenna side

RFID reader

Front side

Back sideadjust distance

RFID tag

Maximum operation distance is during 5 to 6cm.

(3.8) Flip the RFID tag . The back side is over the RFID reader. See the ID on the

LCD module annd move the RFID tag far from RFID reader until does not detect the

RFID tag. Record the distance.

VCC

/EN

ABLE

SO

UT

GN

D

GRAN

Did

ea s

tudio

RFID tagBack side

Antenna side

RFID reader

adjust distance

RFID tag

Front side

Back side

Maximum operation distance is during 5 to 6cm. Summary is that the RFID

reader can detect and read any side of the RFID tag card.


(3.9) Turn the RFID tag long edge over the RFID reader 3 positions following the

figure below. Moving the tag is required to the RFID reader detects the tag.

VCC

/EN

ABLE

SO

UT

GN

D

GRAN

Did

ea s

tudio

RFID tag

VCC

/EN

ABLE

SO

UT

GN

D

GRAN

Did

ea s

tudio

RFID tag

VCC

/EN

ABLE

SO

UT

GN

D

GRAN

Did

ea s

tudio

RFID tag

Antenna side

RFID reader

RFID tagFront side

adjust distance

Antenna side

RFID reader

adjust distance

RFID tagBack side

The RFID reader cannot detect the tag in this direction.


(3.10) Turn the RFID tag short edge over the RFID reader 3 positions following the

figure below. Moving the tag is also required to the RFID reader detects the tag.

VCC

/EN

ABLE

SO

UT

GN

D

GRAN

Did

ea s

tudio

RFID tag

VCC

/EN

ABLE

SO

UT

GN

D

GRAN

Did

ea s

tudio

RFID tag

VCC

/EN

ABLE

SO

UT

GN

D

GRAN

Did

ea s

tudio

RFID tag

Antenna side

RFID reader

adjust distance

RFID

ta

gFro

nt

side

Antenna side

RFID reader

adjust distance

RFID

ta

gBack

sid

e

The RFID reader also cannot detect the tag in this direction.

Summary, RFID reader cannot detect and read the edge of the card. The best

result reading are front and back sides orientation of RFID tag card.


(3.11) Change to the RFID tag circle. Move the tag far from RFID reader until

does not detect the RFID tag. Record the distance. Try with both side of tag.

VCC

/EN

ABLE

SO

UT

GN

D

GRAN

Did

ea s

tudio

VCC

/EN

ABLE

SO

UT

GN

D

GRAN

Did

ea s

tudio

Antenna side

RFID reader

Front side

Back sideadjust distance

RFID circle tag

Antenna side

RFID reader

Back side

Front sideadjust distance

RFID circle tag

Maximum operation distance is during 6 to 7cm.

Summary :

1. The RFID reader can detect and read the RFID tag circle with any flat side.

2. The operation range of RFID reader is same with any flat side of RFID tag card.


(3.12) Place the RFID tag over the RFID reader by edge side 3 positions following

the figure below. Moving the tag is required to the RFID reader detects the tag.

VCC

/EN

ABLE

SO

UT

GN

D

GRAN

Did

ea s

tudio

RFID tag circle

VCC

/EN

ABLE

SO

UT

GN

D

GRAN

Did

ea s

tudio

RFID tag circle

VCC

/EN

ABLE

SO

UT

GN

D

GRAN

Did

ea s

tudio

RFID

tag c

ircl

e

A CB

Antenna side

RFID reader

adjust distance

The RFID reader detects and reads RFID tag circle only position A and C. Range

is similar at 2 to 2.5cm. RFID reader does not detect the RFID tag circle in postion B.


(3.13) Change the direction of the RFID tag from step (3.12) following the figure

below. Try to detect 3 positions. Moving the tag is required till the RFID reader detects

the tag.

VCC

/EN

ABLE

SO

UT

GN

D

GRAN

Did

ea s

tudio

VCC

/EN

ABLE

SO

UT

GN

D

GRAN

Did

ea s

tudio

VCC

/EN

ABLE

SO

UT

GN

D

GRAN

Did

ea s

tudio

RFID tag circle

RFID tag circle

RFID tag circle

A

B C

Antenna side

RFID reader

adjust distance

RFID tag circle

The RFID reader detects and reads RFID tag circle only position A and C. Range

is similar at 2 to 2.5cm. The RFID reader does not detect the RFID tag circle in postion B.

The position B is out of antenna area.

Summary :

1. The RFID reader cannot detect and read the ID from RFID tag circle when the

tag located out of antenna area.

2. The operation range of RFID reader is decreased with edge side of the RFID

tag circle.


(3.14) Place the RFID tag card over the RFID reader at antenna side and insert

some medium between the tag and RFID reader. Test the operation. The medium includes

a piece of papaer, wood with 3mm. thickness and plastic sheet with 3mm. thickness.VCC

/EN

ABLE

SO

UT

GN

D

GR

AN

Did

ea s

tudio

RFID tagFront side

Antenna side

RFID reader

2 to 3cm.

a piece of paper

RFID tagFront side

A piece of paper

VCC

/EN

ABLE

SO

UT

GN

D

GR

AN

Did

ea s

tudio

RFID tagFront side

RFID tagFront side

A piece of wood (3mm. thick)

VCC

/EN

ABLE

SO

UT

GN

D

GR

AN

Did

ea s

tudio

RFID tagFront side

RFID tagFront side

A piece of plastic (3mm. thick)

RFID tag

Antenna side

RFID reader

2 to 3cm.

wood (3mm.)

RFID tag

Antenna side

RFID reader

2 to 3cm.

plastic (3mm.)

RFID tag

The operation of RFID reader is same. The medium paper, wood and plastic

also are not effect the detection if the thickness are not more than the operation

range.


12. RFID logger

This example project is about how to use RFID reader and i-Stamp2P to build a

simple ID logger system. This project required the database software for collecting the

ID data from any RFID tag. We choose AppServ 2.5.10; the free software of Web server

to create the data server in the computer and create the control software from Visual

BASIC 2010 express to manage the system.

12.1 AppServ software installation

AppServ 2.5.10 is free software. Download from http://prdownloads.sourceforge.

net/appserv/appserv-win32-2.6.0.exe?download.

Install the software following these step :

(12.1.1) Double click the setup file; appserv-win32-2.5.10.exe to start the installation.

Click on the Next button.

(12.1.2) Choose components and click on the Next button.


(12.1.3) Put name localhost into the Server Name box and fill the email address

into the Administrator Email box. Click on the Next button.

(12.1.4) Set password for ID root. It is ID for server and database administrator.

Click on the Install button.

(12.1.5) After installation is completed, select Start Apache and Start MySQL for

starting the operation of Web Server and database management software.


12.2 Database preparation

Purpose is making the database table of check-in time and check-out time of

employee.

(12.2.1) O p e n the In te rne t Exp lo re r. Bro w se to a d d re ss http://localhost/

phpMyAdmin/ . The authentication window is appeared. Fill the ID or User name with

root and fill password such as 1234 or another setting from installation steps.

(12.2.2) The new database is created. Put the name db_employee into Create

new database box following click on the Create button.


(12.2.3) Make the database table following these procedures :

(12.2.3.1) Set the nam e as tb_in for storing the ID data, date and check-in

time of employee

(12.2.3.2) Set the Number of Fields as 3

(12.2.3.3) Click on the Go button

(12.2.4) Set name and parameter of data filed as follows :

- id_in field, type is VARCHAR and length is 10 ; choose as Primary

- time_in field, type is TIME choose as Primary

- date_in field, type is DATE and choose as Primary.

Click on the Save button.


(12.2.5) After the tb_in table is created, the message “Table 'db_employee'.'tb_in'

has been created” is appeared in the yellow box. In the SQL quiery box shows all

instructions for creating the table of database and structure. At the left menu; it shows

the database name and number of data table.

(12.2.6) Click on the db_employee(1). The browser will display the new page for

creating the new table. Create the table for storing the ID data, date and check-out

time of employee similar the step 12.2.3. Set the name and parameter as follows :

(12.2.6.1) Set the name as tb_out

(12.2.6.2) Set the Number of Fields as 3 and click on the Go button.


(12.2.7) Set name and parameter of data filed as follows :

- id_out field, type is VARCHAR and length is 10. Choose as Primary.

- time_out field, type is TIME and choose as Primary.

- date_out field, type is DATE and choose as Primary.

Click on the Save button.

(12.2.8) After the tb_out table is created, the message "Table 'db_employee'.'tb_out'

has been created" is appeared in the yellow box. In the SQL quiery box shows all instructions

for creating the table of database and structure. At the left menu; it shows the database

name and number of data table. Now there are 2 tables.


12.3 MySQL driver installation

Before accessing the database with MySQL, you will need to install MySQL ODBC

3.51 Driver. Download at http://dev.mysql.com/downloads/connector/odbc/3.51.html

(12.3.1) Double click on the installation file; mysql-connector-odbc-3.51.30-winx64.msi.

Welcome window is appeared.

(12.3.2) Click on the Next button of each step until the installation is started. After

the installation is completed, the database system is prepared already.


12.4 Database programming with Visual BASIC Express 2010

Next step is creating the software for connecting with database by Visual BASIC

Express 2010.

(12.4.1) Open the VB Express 2010. Create the New project.

(12.4.2) Set the project name as RFIDLogger. Click on the OK button.


(12.4.3) Drag and drop all controls and buttons and set the name of any element

following the picture below.

Label1 : Label for displaying the message “Available Com Ports”

cbbCOMPorts : Combobox for choosing the COM port that connect

with RFID reader system.

btnConnect : Button for displaying the message “Connect” after open

the COM port.

btnDisConnect : Button for displaying the message “Disconnect” after

close the COM port..

btnSearch : Button for displaying the message “Search”. It is button for

searching the employee code

txtSearch : TextBox for filling the employee ID to searching

btnPrint : Button for displaying the message “Print” after print text in

rtxtDataReceived

txtDataReceived : RichTextBox for showing ID data and working time of

employee

lblMessage : Label of RFID reader system interfacing status.

txtRFIDData : TextBox for showing the employee data of RFID tag reading.

Printdialog : Printdialog for opening the Printing dialog box.

PrintDocument1 : PrintDocument control for printing out the data to printer.


(12.4.4) Enter to Form1.vb to write the code by clicking on the View Code button

(12.4.5) Type the code for Class Form1 and subprogram Form1_Load as followings :

Imports System.Data.Odbc

Imports System.Drawing.Printing

Public Class Form1

Dim WithEvents serialPort As New IO.Ports.SerialPort

Dim x As String = "" 'save value form serial port

Dim command As New OdbcCommand

'command for insertSQL string contains a SQL statement that

Dim reader As OdbcDataReader 'for execute command sql

Dim MyConString As String 'string value for connect mysql

Dim num As Integer 'save row sql execute

Dim MyConnection As New OdbcConnection

'MyConnection value connect mysql

Dim strsql As String

Private Sub Form1_Load(ByVal sender As System.Object, ByVal e AsSystem.EventArgs) Handles MyBase.Load

'connect mysql

MyConString = "DRIVER={MySQL ODBC 3.51 Driver};" + "SERVER=localhost;" +"DATABASE=db_employee;" + "UID=root;" + "PASSWORD=1234;" + "OPTION=3;"

MyConnection.ConnectionString = MyConString

MyConnection.Open() 'check port connect and add value on cbbCOMPorts

For i As Integer = 0 To _

My.Computer.Ports.SerialPortNames.Count - 1

cbbCOMPorts.Items.Add(_My.Computer.Ports.SerialPortNames(i))

Next

btnDisconnect.Enabled = False

End Sub

End Class


The Database connection code below are setting the default database

authentification.

MyConString = "DRIVER={MySQL ODBC 3.51 Driver};" + "SERVER=localhost;" +"DATABASE=db_employee;" + "UID=root;" + "PASSWORD=1234;" + "OPTION=3;"

MyConnection.ConnectionString = MyConString

MyConnection.Open()

Data in the MyConString is default data from installation. It includes :

“SERVER=localhost;” : Assign the server name

“DATABASE=db_employee;” : Assign the database name

“UID=root;” : Assign the database ID

“PASSWORD=1234;” : Assign the password

(12.4.7) Double click on the btnConnect button to make the code in subprogram

btnConnect_Click as follows:

Private Sub btnConnect_Click(ByVal sender As System.Object, ByVale As System.EventArgs) Handles btnConnect.Click

If serialPort.IsOpen ThenserialPort.Close()

End IfTry 'set serial port number

With serialPort.PortName = cbbCOMPorts.Text.BaudRate = 9600.Parity = IO.Ports.Parity.None.DataBits = 8.StopBits = IO.Ports.StopBits.One

End WithserialPort.Open() ' open serialportlblMessage.Text = cbbCOMPorts.Text & " connected."

'change text of labelbtnConnect.Enabled = False 'btnConnect disable clickbtnDisconnect.Enabled = True 'btnDisconnect enable clickCatch ex As ExceptionMsgBox(ex.ToString)

End TryEnd Sub

(12.4.8) Double click on the btnDisconnect button to add the code in subprogram

btnDisconnect_Click as follows :

Private Sub btnDisconnect_Click(ByVal sender As System.Object, ByVale As System.EventArgs) Handles btnDisconnect.Click

Try ' close serailportserialPort.Close()lblMessage.Text = serialPort.PortName & " disconnected."

' change text of labelbtnConnect.Enabled = True ' btnConnect enable clickbtnDisconnect.Enabled = False ' btnDisconnect disable clickCatch ex As ExceptionMsgBox(ex.ToString)

End TryEnd Sub


(12.4.9) Add subprogram for receiving the serial data from COM port and show

data at TextBox1 :

Private Sub DataReceived(ByVal sender As Object, ByVal e AsSystem.IO.Ports.SerialDataReceivedEventArgs) Handles serialPort.DataReceived

' update data go to updateTextBoxrtxtDataReceived.Invoke(New myDelegate(AddressOf updateTextBox), New

Object() {})End Sub

(12.4.10) After getting the ID from COM port, transfers data to the updateTextBox

to compare the ID database in the tb_in table. The data is current date. If found the

data, system will find more in the tb_out table. If found; it means this data is completed.

No add the data. In the other hand, if there is not data in each table data; system will

add the current data in the table. Store in the database and show the reading ID on the

TextBox1. The code is as follows :

Public Delegate Sub myDelegate()

Public Sub updateTextBox()Dim currentSystemTime As DateTime = DateTime.Now 'date and time nowx = x + serialPort.ReadExisting 'save data form serialport in xIf x.Length >= 10 Then 'check length data >=10 ok

x.Substring(0, 10) 'substring 0-10

'select input with database for check in or outstrsql = "select * from tb_in where id_in='" + x + "' and date_in='" +

currentSystemTime.Year.ToString + "-" + currentSystemTime.Month.ToString + "-"+ currentSystemTime.Day.ToString + "'"

'execute sql commandcommand = New OdbcCommand(strsql, MyConnection)reader = command.ExecuteReader()num = reader.RecordsAffected

If num <= 0 Then ' if no check in insert data in tb_instrsql = "INSERT INTO tb_in VALUES (‘" + x + "‘, ‘" +

currentSystemTime.TimeOfDay.ToString.Substring(0, 8) + "‘, ‘" +currentSystemTime.Year.ToString + "-" + currentSystemTime.Month.ToString + "-"+ currentSystemTime.Day.ToString + "')"

Tex tBox 1.Te xt = "In " + x + " " +currentSystemTime.TimeOfDay.ToString.Substring(0, 8) + " " +currentSystemTime.Date

Else ' if check out select check outstrsql = "select * from tb_out where id_out='" + x + "' and

date_out='" + currentSystem Time .Yea r.To Stri ng + "-" +currentSystemTime.Month.ToString + "-" + currentSystemTime.Day.ToString + "‘"

command = New OdbcCommand(strsql, MyConnection)reader = command.ExecuteReader()num = reader.RecordsAffected

If num <= 0 Then' insert data in tb_outstrsql = “INSERT INTO tb_out VALUES ('" + x + "', ‘" +

currentSystemTime.TimeOfDay.ToString.Substring(0, 8) + "', ‘" +currentSystemTime.Year.ToString + "-" + currentSystemTime.Month.ToString +"-" +currentSystemTime.Day.ToString + "')"


TextBox1.Text = "Out " + x + " " + currentSystemTime.TimeOfDay.ToString.Substring(0, 8) + " " + currentSystemTime.Date

ElseTextBox1.Text = x & " Cannot add more data"

End IfEnd If

'execute sql commandcommand = New OdbcCommand(strsql, MyConnection)command.ExecuteReader()x = "" 'clear value x

End IfEnd Sub

(12.4.11) Double click on the btnSearch button. Add the following code into

subprogram btnSearch_Click.

Private Sub btnSearch_Click(ByVal sender As System.Object, ByVal e AsSystem.EventArgs) Handles btnSearch.Click

'execute sql select value input in db_employeestrsql = "SELECT tb_in.id_in as Id ,tb_in.date_in as date ,tb_in.time_in

as In_time ,tb_out.time_out as Out_time FROM tb_in,tb_out WHERE tb_in.id_in=’"+ txtS earc h.Te xt + "‘ and tb_ in.i d_in =tb_ out. id_o ut a ndtb_in.date_in=tb_out.date_out ORDER BY date DESC "


' no value in databaseIf num <= 0 Then

rtxtDataReceived.Text = "Can not Search Value Input"

' have value in databaseElse

rtxtDataReceived.Clear() 'clear rich textrtxtDataReceived.AppendText(" ID Date Time_In

Time_out" + Environment.NewLine) ‘print value on richtext

While (reader.Read()) 'next rowrtxtDataReceived.AppendText(reader.GetValue(0).ToString + " " +

reader.GetValue(1).ToString.Substring(0, 9) + " " + reader.GetValue(2).ToString+ " " + reader.GetValue(3).ToString + Environment.NewLine)

End WhileEnd If

End Sub

To searching data from the txtSearch; use select instruction and select only id,

date, time_in and time_out. Search in both table ; tb_in and tb_out by using the

same date and same ID. After that, display the searching ID with reader.Read()

instruction in row and reader.GetValue(0).ToString to select the message in each

column. Includes : id, date, time_in and time_out. (column 0, 1, 2 and 3 respectively)


(12.4.12) Double click on the btnPrint button to make the addition code in

subprogram ; btnPrint_Click as follows :

Private Sub btnPrint_Click(ByVal sender As System.Object, ByVal e AsSystem.EventArgs) Handles btnPrint.Click ' Allow the user to choose the page range he or she would like to print.

PrintDialog1.AllowSomePages = True 'Show the help button.PrintDialog1.ShowHelp = True

' Set the Document property to the PrintDocument for ' which the PrintPage Event has been handled. To display the ' dialog, either this property or the PrinterSettings property ' must be set

PrintDialog1.Document = PrintDocument1Dim result As DialogResult = PrintDialog1.ShowDialog() 'show dialog print

If result = DialogResult.OK Then ‘ If the result is OK then print the document.PrintDocument1.Print()

End IfEnd Sub

' The PrintDialog will print the document' by handling the document’s PrintPage event.Private Sub document_PrintPage(ByVal sender As Object, ByVal e As

System.Drawing.Printing.PrintPageEventArgs) Handles PrintDocument1.PrintPage

' Insert code to render the page here. ' This code will be called when the control is drawn.

' The following code will render a simple message on the printed document. ' Dim text As String = "In document_PrintPage method."

Dim printFont As New System.Drawing.Font(“Arial”, 22, System.Drawing.FontStyle.Regular)' Draw the content.e.Graphics.DrawString(rtxtDataReceived.Text, printFont, System.Drawing.Brushes.Black,

10, 10)End Sub

(12.4.13) The complete code is shown in the Listing 12-1. Run the code. The main

window of this code is shown in the figure 12-1

Figrue 12-1 RFID logger program


Imports System.Data.OdbcImports System.Drawing.Printing

Public Class Form1Dim WithEvents serialPort As New IO.Ports.SerialPortDim x As String = "" ' save value form serial portDim command As New OdbcCommand' command for insertSQL string contains a SQL statement that

Dim reader As OdbcDataReader ' for execute command sqlDim MyConString As String ' string value for connect mysqlDim num As Integer ' save row sql executeDim MyConnection As New OdbcConnection' MyConnection value connect mysql

Dim strsql As String

Private Sub Form1_Load(ByVal sender As System.Object, ByVal e AsSystem.EventArgs) Handles MyBase.Load

' connect mysqlMyConString = "DRIVER={MySQL ODBC 3.51 Driver};" + "SERVER=localhost;" +

"DATABASE=db_employee;" + "UID=root;" + "PASSWORD=1234;" + "OPTION=3;"

MyConnection.ConnectionString = MyConStringMyConnection.Open() 'check port connect and add value on cbbCOMPortsFor i As Integer = 0 To _

My.Computer.Ports.SerialPortNames.Count - 1cbbCOMPorts.Items.Add(_My.Computer.Ports.SerialPortNames(i))

NextbtnDisconnect.Enabled = False

End Sub

Private Sub btnConnect_Click(ByVal sender As System.Object, ByVal e AsSystem.EventArgs) Handles btnConnect.Click

If serialPort.IsOpen ThenserialPort.Close()

End IfTry 'set value serialport for connect

With serialPort.PortName = cbbCOMPorts.Text

.BaudRate = 9600.Parity = IO.Ports.Parity.None.DataBits = 8.StopBits = IO.Ports.StopBits.One

End WithserialPort.Open() ' open serialportlblMessage.Text = cbbCOMPorts.Text & " connected." 'change text of labelbtnConnect.Enabled = False 'btnConnect disable clickbtnDisconnect.Enabled = True 'btnDisconnect enable click

Catch ex As ExceptionMsgBox(ex.ToString)

End TryEnd Sub

Listing 12-1 : Source code of the RFID Logger program. This code is written

by Visual BASIC Express 2010 (continue)




Private Sub btnDisconnect_Click(ByVal sender As System.Object, ByVal e AsSystem.EventArgs) Handles btnDisconnect.Click

Try ' close serailportserialPort.Close()lblMessage.Text = serialPort.PortName & " disconnected."

' change text of labelbtnConnect.Enabled = True ' btnConnect enable clickbtnDisconnect.Enabled = False ' btnDisconnect disable click

Catch ex As ExceptionMsgBox(ex.ToString)

End TryEnd Sub

Private Sub btnSearch_Click(ByVal sender As System.Object, ByVal e AsSystem.EventArgs) Handles btnSearch.Click

'execute sql select value input in db_employeestrsql = "SELECT tb_in.id_in as Id ,tb_in.date_in as date ,tb_in.time_in

as In_time ,tb_out.time_out as Out_time FROM tb_in,tb_out WHERE tb_in.id_in=’"+ txtS earc h.Te xt + "‘ and tb_ in.i d_in =tb_ out. id_o ut a ndtb_in.date_in=tb_out.date_out ORDER BY date DESC "


' no value in databaseIf num <= 0 Then

rtxtDataReceived.Text = "Can not Search Value Input"

' have value in databaseElse

rtxtDataReceived.Clear() 'clear rich textrtxtDataReceived.AppendText(" ID Date Time_In

Time_out" + Environment.NewLine) ‘print value on richtext

While (reader.Read()) 'next rowrtxtDataReceived.AppendText(reader.GetValue(0).ToString + " " +

reader.GetValue(1).ToString.Substring(0, 9) + " " + reader.GetValue(2).ToString+ " " + reader.GetValue(3).ToString + Environment.NewLine)

End WhileEnd If

End Sub

Private Sub btnPrint_Click(ByVal sender As System.Object, ByVal e AsSystem.EventArgs) Handles btnPrint.Click ' Allow the user to choose the page range he or she would like to print.

PrintDialog1.AllowSomePages = True 'Show the help button.PrintDialog1.ShowHelp = True

' Set the Document property to the PrintDocument for ' which the PrintPage Event has been handled. To display the ' dialog, either this property or the PrinterSettings property ' must be set

PrintDialog1.Document = PrintDocument1Dim result As DialogResult = PrintDialog1.ShowDialog() 'show dialog print

If result = DialogResult.OK Then ‘ If the result is OK then print the document.PrintDocument1.Print()

End IfEnd Sub




' The PrintDialog will print the document' by handling the document’s PrintPage event.Private Sub document_PrintPage(ByVal sender As Object, ByVal e As

System.Drawing.Printing.PrintPageEventArgs) Handles PrintDocument1.PrintPage

' Insert code to render the page here. ' This code will be called when the control is drawn.

' The following code will render a simple message on the printed document. ' Dim text As String = "In document_PrintPage method."

Dim printFont As New System.Drawing.Font(“Arial”, 22, System.Drawing.FontStyle.Regular)' Draw the content.e.Graphics.DrawString(rtxtDataReceived.Text, printFont, System.Drawing.Brushes.Black,

10, 10)End Sub

' data received go to DataReceivedPri vate Sub DataReceived(ByVal sender As Object, ByVal e As

System.IO.Ports.SerialDataReceivedEventArgs) Handles serialPort.DataReceived

' update data go to updateTextBoxrtxtDataReceived.Invoke(New myDelegate(AddressOf updateTextBox), New Object() {})

End Sub

Public Delegate Sub myDelegate()

Public Sub updateTextBox()Dim currentSystemTime As DateTime = DateTime.Now ' date and time nowx = x + serialPort.ReadExisting ' save data form serialport in xIf x.Length >= 10 Then ' check length data >=10 ok

x.Substring(0, 10) ' substring 0-10

' select input with database for check in or outstrsql = “select * from tb_in where id_in='" + x + "' and date_in='" +

currentSystemTime.Year.ToString + "-" + currentSystemTime.Month.ToString + "-"+ currentSystemTime.Day.ToString + "'"

' execute sql commandcommand = New OdbcCommand(strsql, MyConnection)reader = command.ExecuteReader()num = reader.RecordsAffected

If num <= 0 Then ' if no check in insert data in tb_instrsql = "INSERT INTO tb_in VALUES (‘" + x + "‘, ‘" +

currentSystemTime.TimeOfDay.ToString.Substring(0, 8) + "‘, ‘" +currentSystemTime.Year.ToString + "-" + currentSystemTime.Month.ToString + "-"+ currentSystemTime.Day.ToString + "')"

Tex tBox 1.Te xt = "In " + x + " " +currentSystemTime.TimeOfDay.ToString.Substring(0, 8) + " " +currentSystemTime.Date

Else ' if check out select check outstrsql = "select * from tb_out where id_out='" + x + "' and

date_out='" + currentSystem Time .Yea r.To Stri ng + "-" +currentSystemTime.Month.ToString + "-" + currentSystemTime.Day.ToString + "‘"




by Visual BASIC Express 2010 (final)

If num <= 0 Then' insert data in tb_outstrsql = “INSERT INTO tb_out VALUES ('" + x + "', ‘" +

currentSystemTime.TimeOfDay.ToString.Substring(0, 8) + "', ‘" +currentSystemTime.Year.ToString + "-" + currentSystemTime.Month.ToString +"-" +currentSystemTime.Day.ToString + "')"

Te xtBo x1.T ext = "O ut " + x + " " +currentSystemTime.TimeOfDay.ToString.Substring(0, 8) + " " +currentSystemTime.Date

ElseTextBox1.Text = x & " Cannot add more data"

End IfEnd If

' execute sql commandcommand = New OdbcCommand(strsql, MyConnection)command.ExecuteReader()x = "" ' clear value x

End IfEnd Sub

End Class

12.5 Microcontroller code

Open the BASIC Stamp editor to create the code following the Listing 12-2.

Download this to i-Stamp2P microcontroller. Use the circuit and connection diagram

same the experiment 3.

' {$STAMP BS2p}

' {$PBASIC 2.5}

m VAR Byte (10)

LOW 2

main :

SERIN 3, 1021, [WAIT($0A),STR m\10]

FREQOUT 4,1000,1000 'output sound on port 4

SEROUT 16, 240, [STR m\10]

PAUSE 2000

GOTO Main

Listing 12-2 : RFIDreader.bsp; Read the RFID tag to show on the RFID logger

software that created by Visual BASIC express 2010


12.6 Testing

(12.6.1) Run the VB express 2010 code and microcontroller code. The RFID logger

software window will appear. Select the connected COM port.

(12.6.2) Place the RFID tag over the RFID reader. See the operation at the RFID

program window.

ID of RFID tag is read and show in the program following the figure 12-2.

The first reading is Check-in time of the current date.

(12.6.3) Read the same RFID tag again.

ID of RFID tag is read and show in the program following the figure 12-3.

The second reading is Check-out time of the current date.

Figrue 12-2 RFID logger software with

check-in RFID tagFigrue 12-3 RFID logger software with

check-out RFID tag


(12.6.4) Next,try to serach the RFID tag record. Type the ID of the register tag in

Search box. Click on the Search button. The database of this tag is shown in the figure

12-4.

Figrue 12-4 RFID logger software with the

registered RFID tag data

(12.6.5) User can print this data. Click on the Print button to print to the target

printer following the figure 12-5.

You can add more RFID tags data that you want. The maximum record are

depended on the computer memory storage.

Figrue 12-5 RFID logger software with the

print window for printing the registered

RFID tag data

That is the simple application of RFID system. It includes the RFID

reader hardware, microcontroller to control the operation and interface

with computer. At the computer side, requires the suitable software that

includes database management and microcontroller interfacing.


Date post:	28-Mar-2016
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