Hi all, i'm not really good with programming, i'm trying to make a project where i have a card reader and a atmega2560, whenever i tap my EZ-link card on the reader, it will pop something out in the serial monitor. However i'm not sure where did i went wrong.
This is the code i got it from online (Github)
Whenever i tapped my ez-link card onto the reader, nothing shows up on my serial monitor, is the EZ-link not compatible? or am i doing something wrong?
I've also connected the atmega 2560 to the RDM 8800 :
TX to TX
RX to RX
5V to 5V
GND to GND
if possible i'd love some help from a fellow Singaporean!
/******************** RDM8800 *************************
This vesion source code of RDM8800 firmware reads Singapore's EZLink cards.
They use 13.56MHZ RFID Tag type ISO 14443 Type B[1] / CEPAS protocol.
From the original source code written by Stan Lee(Lizq@iteadstudio.com).
When a card is detected it returns as a comma seperated list of text fields.
They are the card number, balance, number of days since 1995-01-01 to expire
and number of days since 1995-01-01 created.
So for example:
Presenting a card will return:
1000130019390060,8.38,9107,6915
Which can be broken up into the following comma seperated fields:
Number: 1000130019390060
Balance: 8.38
Expire days: 9107
Created days: 6915
By Bill - bill@anantya.com 19/Jun/2014
************************************************************/
#include <PN532Lib.h>
#include <SPI.h>
uint8_t cardDataIn[128];
uint8_t cardDataOut[] = {
0x01, // target number (always 1)
0x90, // command class
0x32, // INS - read purse
0x03, // purse #3
0x00, // param 1
0x00, // param 2
0x00, // LC
0x00 // ??
};
const int LED = 3;
#define PN532_CS 10
PN532Lib nfc(PN532_CS);
void setup(void) {
// setup serial at 9600 baud
Serial.begin(9600);
// startup the nfc card reader
nfc.begin();
nfc.SAMConfig();
pinMode(LED,OUTPUT);
digitalWrite(LED,LOW);
}
void loop(void) {
// look for EzLink cards
uint32_t id = nfc.readPassiveTargetID(PN532_MIFARE_ISO14443B, PN532_CARDTYPEB);
// if random tag id number then we have a card
if (id != 0) {
// now request the card data
if ( nfc.dataExchange(cardDataOut, sizeof(cardDataOut), cardDataIn, sizeof(cardDataIn)) ) {
// if card data found set the LED to on
digitalWrite(LED,HIGH);
// send out the card number
uint8_t i;
for ( i = 0; i < 8; i ++ ) {
Serial.print((cardDataIn[8 + i] >> 4) & 0x0F, HEX);
Serial.print(cardDataIn[8 + i] & 0x0F, HEX);
}
// send out the balance
double balance = (cardDataIn[2] << 16 ) | (cardDataIn[3] << 8 ) | (cardDataIn[4] );
Serial.print(",");
Serial.print(balance / 100);
// send out the expired day count from 1995
uint32_t expireDays = (cardDataIn[24] << 8 ) | (cardDataIn[25]);
Serial.print(",");
Serial.print(expireDays);
// send out the created days
uint32_t createDays = (cardDataIn[26] << 8 ) | (cardDataIn[27]);
Serial.print(",");
Serial.print(createDays);
// send the end or record cr/lf
Serial.println("");
// wait a bit for the LED
delay(20);
// off LED
digitalWrite(LED,LOW);
}
}
// loop delay before the next read attempt
delay(100);
}
