Programare arduino rfid

Step 1: Connecting the RFID module to Arduino:

Setting up the hardware is very easy, just plug the XBee shield with the RFID module to Arduino. The jumpers in

the XBee shield have to be set to XBEE position. Now you can program the Arduino and communicate it with the

RFID module using the serial port (Serial.read(), Serial.print()...).

Step 2: Reading EM4100 cards (read only cards):

In this part we show an example of the Arduino reading EM4100 cards. We use the Auto Read mode. Arduino is waiting all the time, when a card is detected, we read its code, blink the Arduino LED and print the code over USB port.

Command

0x87 - Set Auto Mode: EM4102 Mode - Parity decoded - Manchester RF/64

FF 01 09 87 01 03 02 00 10 20 30 40 37

Arduino code: /* * RFID module from Libelium for Arduino * Basic program, just Read EM1000 cards * * Copyright (C) 2008 Libelium Comunicaciones Distribuidas S.L.

* http://www.libelium.com * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. * * Version 0.1 * Author: Marcos Yarza */

// var int led = 13; byte data_1 = 0x00; byte data_2 = 0x00; byte data_3 = 0x00; byte data_4 = 0x00; byte data_5 = 0x00; int val = 0;

void setup(){ // Start serial port 19200 bps Serial.begin(19200); pinMode(led, OUTPUT); delay(500); // Setting Auto Read Mode - EM4102 Decoded Mode - No password // command: FF 01 09 87 01 03 02 00 10 20 30 40 37 Serial.print(0xFF,BYTE); Serial.print(0x01,BYTE); Serial.print(0x09,BYTE); Serial.print(0x87,BYTE); Serial.print(0x01,BYTE); Serial.print(0x03,BYTE); Serial.print(0x02,BYTE); Serial.print(0x00,BYTE); Serial.print(0x10,BYTE); Serial.print(0x20,BYTE); Serial.print(0x30,BYTE); Serial.print(0x40,BYTE); Serial.print(0x37,BYTE);

delay(500); Serial.flush(); Serial.println(); Serial.println("RFID module started in Auto Read Mode"); }

void loop(){ val = Serial.read(); while (val != 0xff){ Serial.println("Waiting card"); val = Serial.read(); delay(1000); } // Serial.read(); // we read ff Serial.read(); // we read 01 Serial.read(); // we read 06 Serial.read(); // we read 10 data_1 = Serial.read(); // we read data 1 data_2 = Serial.read(); // we read data 2 data_3 = Serial.read(); // we read data 3 data_4 = Serial.read(); // we read data 4 data_5 = Serial.read(); // we read data 5 Serial.read(); // we read checksum // Led blink for(int i = 0;i<4;i++){ digitalWrite(led,HIGH); delay(500); digitalWrite(led,LOW); delay(500); } // Printing the code of the card Serial.println(); Serial.print("EM4100 card found - Code: "); writeByte(data_1); writeByte(data_2); writeByte(data_3); writeByte(data_4); writeByte(data_5); Serial.println(); Serial.println();

}

//Write a byte (hex) in ASCII void writeByte(byte data){ int aux_1 = 0; int aux_2 = 0;

aux_1=data/16; aux_2=data%16; if (aux_1<10){ Serial.print(aux_1 + 48,BYTE); } else{ Serial.print(aux_1+55,BYTE); } if (aux_2<10){ Serial.print(aux_2 + 48,BYTE); } else{ Serial.print(aux_2 + 55,BYTE); } Serial.print(" "); }

Here is the USB output using the Arduino IDE serial port terminal

Step 3: Reading T5557 cards:

The next example of use of the RFID module is the reading of T5557 rewritable cards using Arduino.

Command

0x87 - Set Auto Mode: Byte track mode - Parity decoded - Manchester RF/64, 7 blocks, without password.

FF 01 09 87 01 01 07 00 10 20 30 40 3A

Arduino code: /* * RFID module from Libelium for Arduino * Basic program, just Read T5557 (rewritable) cards * * Copyright (C) 2008 Libelium Comunicaciones Distribuidas S.L. * http://www.libelium.com * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. * * Version 0.1 * Author: Marcos Yarza */

// var int led = 13; byte block1_byte1 = 0x00; byte block1_byte2 = 0x00; byte block1_byte3 = 0x00; byte block1_byte4 = 0x00;

byte block2_byte1 = 0x00; byte block2_byte2 = 0x00; byte block2_byte3 = 0x00; byte block2_byte4 = 0x00;






int val = 0;

void setup(){ // Start serial port 19200 bps Serial.begin(19200); pinMode(led, OUTPUT); delay(500); // Setting Auto Read Mode - T5557 7 blocks without password Serial.print(0xFF,BYTE); Serial.print(0x01,BYTE); Serial.print(0x09,BYTE); Serial.print(0x87,BYTE); Serial.print(0x01,BYTE); Serial.print(0x01,BYTE); Serial.print(0x07,BYTE); Serial.print(0x00,BYTE); Serial.print(0x10,BYTE); Serial.print(0x20,BYTE); Serial.print(0x30,BYTE); Serial.print(0x40,BYTE); Serial.print(0x3A,BYTE); delay(500); Serial.flush(); Serial.println(); Serial.println(); Serial.println("RFID module started in Auto Read Mode"); }

void loop(){ val = Serial.read(); while (val != 0xff){ Serial.println("Waiting card"); val = Serial.read(); delay(1000); } // Serial.read(); // we read ff Serial.read(); // we read 01 Serial.read(); // we read 1d Serial.read(); // we read 10 block1_byte1 = Serial.read(); // we read block 1 byte 1 block1_byte2 = Serial.read(); // we read block 1 byte 2 block1_byte3 = Serial.read(); // we read block 1 byte 3 block1_byte4 = Serial.read(); // we read block 1 byte 4 block2_byte1 = Serial.read(); // we read block 2 byte 1 block2_byte2 = Serial.read(); // we read block 2 byte 2 block2_byte3 = Serial.read(); // we read block 2 byte 3 block2_byte4 = Serial.read(); // we read block 2 byte 4 block3_byte1 = Serial.read(); // we read block 3 byte 1 block3_byte2 = Serial.read(); // we read block 3 byte 2 block3_byte3 = Serial.read(); // we read block 3 byte 3 block3_byte4 = Serial.read(); // we read block 3 byte 4 block4_byte1 = Serial.read(); // we read block 4 byte 1 block4_byte2 = Serial.read(); // we read block 4 byte 2 block4_byte3 = Serial.read(); // we read block 4 byte 3 block4_byte4 = Serial.read(); // we read block 4 byte 4 block5_byte1 = Serial.read(); // we read block 5 byte 1 block5_byte2 = Serial.read(); // we read block 5 byte 2 block5_byte3 = Serial.read(); // we read block 5 byte 3 block5_byte4 = Serial.read(); // we read block 5 byte 4 block6_byte1 = Serial.read(); // we read block 6 byte 1 block6_byte2 = Serial.read(); // we read block 6 byte 2 block6_byte3 = Serial.read(); // we read block 6 byte 3 block6_byte4 = Serial.read(); // we read block 6 byte 4 block7_byte1 = Serial.read(); // we read block 7 byte 1 block7_byte2 = Serial.read(); // we read block 7 byte 2 block7_byte3 = Serial.read(); // we read block 7 byte 3 block7_byte4 = Serial.read(); // we read block 7 byte 4 Serial.read(); // we read checksum

// Led blink for(int i = 0;i<4;i++){ digitalWrite(led,HIGH); delay(500); digitalWrite(led,LOW); delay(500); } // Printing the code of the card Serial.println(); Serial.println("T5557 card found - Data read: "); Serial.println("---------------------------------------"); Serial.print("-- Block 1 -- | "); writeByte(block1_byte1); Serial.print(" | "); writeByte(block1_byte2); Serial.print(" | "); writeByte(block1_byte3); Serial.print(" | "); writeByte(block1_byte4); Serial.println(" |"); Serial.print("-- Block 2 -- | "); writeByte(block2_byte1); Serial.print(" | "); writeByte(block2_byte2); Serial.print(" | "); writeByte(block2_byte3); Serial.print(" | "); writeByte(block2_byte4); Serial.println(" |"); Serial.print("-- Block 3 -- | "); writeByte(block3_byte1); Serial.print(" | "); writeByte(block3_byte2); Serial.print(" | "); writeByte(block3_byte3); Serial.print(" | "); writeByte(block3_byte4); Serial.println(" |"); Serial.print("-- Block 4 -- | "); writeByte(block4_byte1); Serial.print(" | "); writeByte(block4_byte2); Serial.print(" | "); writeByte(block4_byte3); Serial.print(" | "); writeByte(block4_byte4); Serial.println(" |"); Serial.print("-- Block 5 -- | "); writeByte(block5_byte1); Serial.print(" | "); writeByte(block5_byte2); Serial.print(" | "); writeByte(block5_byte3); Serial.print(" | "); writeByte(block5_byte4); Serial.println(" |"); Serial.print("-- Block 6 -- | "); writeByte(block6_byte1); Serial.print(" | "); writeByte(block6_byte2); Serial.print(" | "); writeByte(block6_byte3); Serial.print(" | "); writeByte(block6_byte4); Serial.println(" |"); Serial.print("-- Block 7 -- | "); writeByte(block7_byte1); Serial.print(" | "); writeByte(block7_byte2); Serial.print(" | "); writeByte(block7_byte3); Serial.print(" | "); writeByte(block7_byte4); Serial.println(" |"); Serial.println("---------------------------------------"); Serial.println();

}



Serial output (Arduino Serial Monitor)

As you can see, Arduino reads 7 blocks of memory (4 bytes each):

Block 1: 52 58 8B 45

Block 2: 02 02 02 02

Block 3: 03 03 03 03

Block 4: 04 04 04 04

Block 5: 05 05 05 05

Block 6: 06 06 06 06

Block 7: 00 00 00 00

Step 4: Reading / writing T5557 cards:

The next example for this module is the writing/reading of RFID cards. We program an Arduino board to read a T5557 card, then Arduino writes blocks 2, 3, 4, 5 and 6 of the card with an incremental value each time.

Command

0x10 - Read Tag: Byte track Mode - Manchester RF/64, 7 Blocks

0x40 - Configure Tag programming parameters:

WG = 50 (0x32)

SG = 100 0x64)

ONE = 90 (0x5A)

ZERO = 30 (0x1E)

PADF = 96 (0x60)

0x20 - Write Tag

Warning!!!

Don't write block 0, 1 or 7 if you are not an advanced user!!! Block 0 - It should not be programmed with arbitrary values otherwise the tag may not be accessed

again. Block 1 - This block can be used for “Byte Track” method. What is programmed in this block should be

traced by SM125 (typically 52 58 8B 45). Block 7 - This block can be used as general purpose data block or can be used as password. If

password is enabled, access to the tag requires the password that matches block7 content. Once password is enabled and if the block7 data is unknown then it is impossible to access the tag again unless with the correct 4 byte password.

Arduino code: /* * RFID module from Libelium for Arduino * Basic program, Read and write T5557 cards * * Copyright (C) 2010 Libelium Comunicaciones Distribuidas S.L. * http://www.libelium.com * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. * * Version 0.1 * Author: Marcos Yarza */

// var int led = 13;








int val = 0;

byte valueToStore = 0x00;

void setup(){ // Start serial port 19200 bps Serial.begin(19200); pinMode(led, OUTPUT); delay(500); // Configure Tag programming parameters // Command: FF 01 06 40 32 64 5A 1E 60 B5 Serial.print(0xFF,BYTE); Serial.print(0x01,BYTE); Serial.print(0x06,BYTE); Serial.print(0x40,BYTE); Serial.print(0x32,BYTE); Serial.print(0x64,BYTE); Serial.print(0x5A,BYTE); Serial.print(0x1E,BYTE); Serial.print(0x60,BYTE); Serial.print(0xB5,BYTE);

delay(500); Serial.flush(); }

void loop(){

// Read the card: Byte track Mode - Manchester RF/64 7 blocks readTag(0x01,0x07); digitalWrite(led,HIGH); Serial.println("Waiting card to read"); Serial.flush(); delay(5000); digitalWrite(led,LOW); getTag(); // Add 1 to the value to store in card if (valueToStore == 0xFF){ valueToStore = 0x00; } else { valueToStore++; } delay(5000); // Write card Serial.println("Waiting card to write ..."); Serial.println("Put the card on the reader..."); digitalWrite(led,HIGH); delay(5000); Serial.print("Writing: "); writeByte(valueToStore); Serial.println(); // We write blocks 2, 3, 4, 5 and 6 // Warning !!! // don't write block 1 or 7 if you are not an advanced user!!!

writeTag(0x02,valueToStore,valueToStore,valueToStore,valueToStore); writeTag(0x03,valueToStore,valueToStore,valueToStore,valueToStore); writeTag(0x04,valueToStore,valueToStore,valueToStore,valueToStore); writeTag(0x05,valueToStore,valueToStore,valueToStore,valueToStore); writeTag(0x06,valueToStore,valueToStore,valueToStore,valueToStore); Serial.println(); Serial.println("Card ready!!!"); delay(5000); }

// Command for read a Tag void readTag(byte modeRead, byte blocks){ // Read command: FF 01 03 10 02 02 18

byte checksum = 0x01 + 0x03 + 0x10 + modeRead + blocks;

Serial.print(0xFF,BYTE); Serial.print(0x01,BYTE); Serial.print(0x03,BYTE); Serial.print(0x10,BYTE); Serial.print(modeRead,BYTE); Serial.print(blocks,BYTE); Serial.print(checksum,BYTE); }

// Write a byte (hex) in ASCII void writeByte(byte data){ int aux_1 = 0; int aux_2 = 0;


void writeTag(byte block, byte data0, byte data1, byte data2, byte data3){ byte checksum = 0x01 + 0x06 + 0x20 + block + data0 + data1 + data2 + data3; Serial.print(0xFF,BYTE); Serial.print(0x01,BYTE); Serial.print(0x06,BYTE); Serial.print(0x20,BYTE); Serial.print(block,BYTE); Serial.print(data0,BYTE); Serial.print(data1,BYTE); Serial.print(data2,BYTE); Serial.print(data3,BYTE); Serial.print(checksum,BYTE);

delay(2000); }

// Reading T5557 tags 7 blocks void getTag(){ val = Serial.read(); // we read ff if (val > 0){ Serial.read(); // we read 01 Serial.read(); // we read 0d Serial.read(); // we read 10 block1_byte1 = Serial.read(); // we read block 1 byte 1 block1_byte2 = Serial.read(); // we read block 1 byte 2 block1_byte3 = Serial.read(); // we read block 1 byte 3 block1_byte4 = Serial.read(); // we read block 1 byte 4 block2_byte1 = Serial.read(); // we read block 2 byte 1 block2_byte2 = Serial.read(); // we read block 2 byte 2 block2_byte3 = Serial.read(); // we read block 2 byte 3 block2_byte4 = Serial.read(); // we read block 2 byte 4 block3_byte1 = Serial.read(); // we read block 3 byte 1 block3_byte2 = Serial.read(); // we read block 3 byte 2 block3_byte3 = Serial.read(); // we read block 3 byte 3 block3_byte4 = Serial.read(); // we read block 3 byte 4 block4_byte1 = Serial.read(); // we read block 4 byte 1 block4_byte2 = Serial.read(); // we read block 4 byte 2 block4_byte3 = Serial.read(); // we read block 4 byte 3 block4_byte4 = Serial.read(); // we read block 4 byte 4 block5_byte1 = Serial.read(); // we read block 5 byte 1 block5_byte2 = Serial.read(); // we read block 5 byte 2 block5_byte3 = Serial.read(); // we read block 5 byte 3 block5_byte4 = Serial.read(); // we read block 5 byte 4 block6_byte1 = Serial.read(); // we read block 6 byte 1 block6_byte2 = Serial.read(); // we read block 6 byte 2 block6_byte3 = Serial.read(); // we read block 6 byte 3 block6_byte4 = Serial.read(); // we read block 6 byte 4 block7_byte1 = Serial.read(); // we read block 7 byte 1 block7_byte2 = Serial.read(); // we read block 7 byte 2 block7_byte3 = Serial.read(); // we read block 7 byte 3 block7_byte4 = Serial.read(); // we read block 7 byte 4 Serial.read(); // we read checksum

// Led blink for(int i = 0;i<4;i++){ digitalWrite(led,HIGH); delay(500); digitalWrite(led,LOW); delay(500); } // Printing the code of the card Serial.println(); Serial.println("T5557 card found - Data read: "); Serial.println("---------------------------------------"); Serial.print("-- Block 1 -- | "); writeByte(block1_byte1); Serial.print(" | "); writeByte(block1_byte2); Serial.print(" | "); writeByte(block1_byte3); Serial.print(" | "); writeByte(block1_byte4); Serial.println(" |"); Serial.print("-- Block 2 -- | "); writeByte(block2_byte1); Serial.print(" | "); writeByte(block2_byte2); Serial.print(" | "); writeByte(block2_byte3); Serial.print(" | "); writeByte(block2_byte4); Serial.println(" |"); Serial.print("-- Block 3 -- | "); writeByte(block3_byte1); Serial.print(" | "); writeByte(block3_byte2); Serial.print(" | "); writeByte(block3_byte3); Serial.print(" | "); writeByte(block3_byte4); Serial.println(" |"); Serial.print("-- Block 4 -- | "); writeByte(block4_byte1); Serial.print(" | "); writeByte(block4_byte2); Serial.print(" | "); writeByte(block4_byte3); Serial.print(" | "); writeByte(block4_byte4); Serial.println(" |"); Serial.print("-- Block 5 -- | "); writeByte(block5_byte1); Serial.print(" | "); writeByte(block5_byte2); Serial.print(" | "); writeByte(block5_byte3); Serial.print(" | "); writeByte(block5_byte4); Serial.println(" |"); Serial.print("-- Block 6 -- | "); writeByte(block6_byte1); Serial.print(" | "); writeByte(block6_byte2); Serial.print(" | "); writeByte(block6_byte3); Serial.print(" | "); writeByte(block6_byte4); Serial.println(" |"); Serial.print("-- Block 7 -- | "); writeByte(block7_byte1); Serial.print(" | "); writeByte(block7_byte2); Serial.print(" | "); writeByte(block7_byte3); Serial.print(" | "); writeByte(block7_byte4); Serial.println(" |"); Serial.println("---------------------------------------"); Serial.println(); }

else Serial.println("No card"); }

Serial monitor output

Step 5: Reading / writing T5557 cards using password:

Warning!!!

Once password is enabled, if the block 7 data is unknown then it is impossible to access the card again unless

with the correct 4 byte password.

For activating the password, we'll program the block 0, we have to be careful programming this block otherwise

the tag may not be accessed again.

Activate password in the card

First of all, we have to discover the password (4 bytes), so we have to read the block 7 in the card (see the above example).Password for our card:

00 00 00 00

Once we know the password of the card we can activate it using this command

Command for activating the password in the card

FF 01 0A 23 00 00 14 80 F0 XX XX XX XX CHECKSUM

XX XX XX XX => Password

Writing data in a protected card

For writing data using password we'll use command 0x23Write with pass command

FF 01 0A 23 BLOCK DATA0 DATA1 DATA2 DATA3 XX XX XX XX CHECKSUM

BLOCK: Block to write (0x02, 0x03,0x04, 0x05, 0x06 or 0x07)

DATA0, DATA1, DATA2, DATA3: Data bytes to store (4 bytes)

XX XX XX XX: Password (4 bytes)

Reading data in a protected card

For reading data in a protected card, we'll use command 0x13Read with pass command

FF 01 07 13 01 BLOCKS XX XX XX XX CHECKSUM

BLOCKS: Blocks to read (1-7)

XX XX XX XX: Pasword

We also could use Auto read mode)

Deactivate password in the card

Just sending this command you can deactivate the password in the card.FF 01 0A 23 00 00 14 80 E0 XX XX XX XX CHECKSUM

XX XX XX XX => Password

Step 6: Using the sleep mode:

An advantage of our RFID module is that it has got a sleep mode that let us save power hen we don't use it. Go to

the sleep mode is very easy, just sending a command. When the RFID is in sleeping mode and we want to wake

up it we need to provide it a HIGH (5V) pulse to the reset pin. We'll use one of the Arduino outputs to control the

reset signal. For making the connection we'll use a cable from output 8 to RST pin in the XBee shield (look

picture).

Connection

Arduino: pin 8

XBee shield: RST (pin 5)

Command to go to sleep mode:

FF 01 01 60 62

Arduino code: /* * RFID module from Libelium for Arduino * Basic program, just Read EM1000 cards and go to sleep mode * * Copyright (C) 2010 Libelium Comunicaciones Distribuidas S.L. * http://www.libelium.com * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

* GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. * * Version 0.1 * Author: Marcos Yarza */

// var int led = 13; int wake_pin = 8;

byte data_1 = 0x00; byte data_2 = 0x00; byte data_3 = 0x00; byte data_4 = 0x00; byte data_5 = 0x00; int val = 0;

void setup(){ // Start serial port 19200 bps Serial.begin(19200); pinMode(led, OUTPUT); pinMode(wake_pin, OUTPUT); delay(500); Serial.flush(); Serial.println(); Serial.println("RFID module started in Auto Read Mode"); }

void loop(){ // Setting Auto Read Mode - EM4102 Decoded Mode - No password // command: FF 01 09 87 01 03 02 00 10 20 30 40 37 Serial.print(0xFF,BYTE); Serial.print(0x01,BYTE); Serial.print(0x09,BYTE); Serial.print(0x87,BYTE); Serial.print(0x01,BYTE); Serial.print(0x03,BYTE); Serial.print(0x02,BYTE); Serial.print(0x00,BYTE); Serial.print(0x10,BYTE); Serial.print(0x20,BYTE); Serial.print(0x30,BYTE); Serial.print(0x40,BYTE); Serial.print(0x37,BYTE);

Serial.flush(); digitalWrite(led, HIGH); digitalWrite(wake_pin, LOW); // wait for Tag val = Serial.read(); while (val != 0xff){ Serial.println("Waiting card"); val = Serial.read(); delay(1000); } // Serial.read(); // we read ff Serial.read(); // we read 01 Serial.read(); // we read 06 Serial.read(); // we read 10 data_1 = Serial.read(); // we read data 1 data_2 = Serial.read(); // we read data 2 data_3 = Serial.read(); // we read data 3 data_4 = Serial.read(); // we read data 4 data_5 = Serial.read(); // we read data 5 Serial.read(); // we read checksum // Printing the code of the card Serial.println(); Serial.print("EM4100 card found - Code: "); writeByte(data_1); writeByte(data_2); writeByte(data_3); writeByte(data_4); writeByte(data_5); Serial.println(); Serial.println(); digitalWrite(led,LOW);

// go to sleep mode for 25 seconds Serial.println("Go to sleep mode for 25s ...");

// Sleep command Serial.print(0xFF,BYTE); Serial.print(0x01,BYTE); Serial.print(0x01,BYTE); Serial.print(0x60,BYTE); Serial.print(0x62,BYTE);

// wait for 25 sec delay(25000);

// wake up digitalWrite(wake_pin,HIGH); delay(500); digitalWrite(wake_pin,LOW);

}



Programare arduino rfid

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