Using library: RFID_Kit_v2.0_for_Arduino\RFID Kit v2.0 for Arduino\Lesson29 RFID Entrance Guard System\code\rfidTest
The problem is that the IDE generated a function prototype in Line5, so the code submitted to the compiler looks like this: (the error message I then get is: 'RFID' does not name a type)
#include"rfid.h"
#include <LiquidCrystal_I2C.h>
#include <Wire.h>
LiquidCrystal_I2C lcd(0x27,16,2);
RFID rfid; //create a variable type of RFID
#define relayPin 8 //relay module attach to pin8
uchar serNum[5]; // array to store your ID
void setup()
{
lcd.init(); //initialize lcd
lcd.backlight(); //turn on the backlight
Serial.begin(9600);
rfid.begin(7, 5, 4, 3, 6, 2);//rfid.begin(IRQ_PIN,SCK_PIN,MOSI_PIN,MISO_PIN,NSS_PIN,RST_PIN)
delay(100);
rfid.init(); //initialize the RFID
pinMode(relayPin, OUTPUT); //set relayPin as OUTPUT
digitalWrite(relayPin,HIGH); //and high level
//Serial.begin(9600);
lcd.setCursor(0,0);
lcd.print(" Welcome! "); //print" Welcome! "
delay(2000);//delay 2s
}
void loop()
{
uchar status;
uchar str[MAX_LEN];
// Search card, return card types
status = rfid.request(PICC_REQIDL, str);
if (status != MI_OK)
{
return;
}
// Show card type
rfid.showCardType(str);
//Prevent conflict, return the 4 bytes Serial number of the card
status = rfid.anticoll(str);
if (status == MI_OK)
{
//Serial.print("The card's number is: ");
lcd.setCursor(0,0);
lcd.print(" ID: ");
memcpy(serNum, str, 5);
rfid.showCardID(serNum);//show the card ID
// Serial.println();
// Check people associated with card ID
uchar* id = serNum;
if( id[0]==0x4B && id[1]==0xE6 && id[2]==0xD1 && id[3]==0x3B )
{
digitalWrite(relayPin,LOW);
// Serial.println("Hello Dannel!");
lcd.setCursor(0,1);
lcd.print(" Hello Dannel! ");
delay(2000);
lcd.clear();
digitalWrite(relayPin,HIGH);
}
//if the card id is 5AE4C955,then relay connect
else if(id[0]==0x5A && id[1]==0xE4 && id[2]==0xC9 && id[3]==0x55)
{
digitalWrite(relayPin,LOW);
//Serial.println("Hello SunFounder");
lcd.setCursor(0,1);
lcd.print("Hello SunFounder");
delay(2000);
lcd.clear();
digitalWrite(relayPin,HIGH);
}
else
{
//Serial.println("Hello unkown guy!");
lcd.setCursor(0,1);
lcd.print("Hello unkown guy");
delay(2000);
lcd.clear();
}
}
lcd.setCursor(0,0);
lcd.print(" Welcome! ");
delay(2000);
rfid.halt(); //command the card into sleep mode
}