This is my first time attempting an Arduino project. I am attempting to make an RFID reader that will give me the card program number when scanned. I have it to where it will give me the info if I monitor the serial output, but I am trying to make it output to an LCD screen. I keep getting a compilation error that lcd.h: No such file or directory exists. I'm not sure how to either download the file or allow the Arduino to download it. Here is the full error message:
K:\johns arduino\sketch_apr9\sketch_apr9.ino:25:10: fatal error: LCD.h: No such file or directory
#include <LCD.h>
^~~~~~~
compilation terminated.
exit status 1
Compilation error: LCD.h: No such file or directory
Here is the code I am trying to use. This is not my code:
#include <Wire.h>
#include <LCD.h>
#include <LiquidCrystal_I2C.h>
#define MAX_BITS 100 // max number of bits
#define WEIGAND_WAIT_TIME 3000 // time to wait for another weigand pulse.
#define I2C_ADDR 0x27 // Define I2C Address where the PCF8574A is
#define BACKLIGHT_PIN 3
#define En_pin 2
#define Rw_pin 1
#define Rs_pin 0
#define D4_pin 4
#define D5_pin 5
#define D6_pin 6
#define D7_pin 7
int n = 1;
LiquidCrystal_I2C lcd(I2C_ADDR,En_pin,Rw_pin,Rs_pin,D4_pin,D5_pin,D6_pin,D7_pin);
unsigned char databits[MAX_BITS]; // stores all of the data bits
unsigned char bitCount; // number of bits currently captured
unsigned char flagDone; // goes low when data is currently being captured
unsigned int weigand_counter; // countdown until we assume there are no more bits
unsigned long facilityCode=0; // decoded facility code
unsigned long cardCode=0; // decoded card code
// interrupt that happens when INTO goes low (0 bit)
void ISR_INT0()
{
//Serial.print("0");
bitCount++;
flagDone = 0;
weigand_counter = WEIGAND_WAIT_TIME;
}
// interrupt that happens when INT1 goes low (1 bit)
void ISR_INT1()
{
//Serial.print("1");
databits[bitCount] = 1;
bitCount++;
flagDone = 0;
weigand_counter = WEIGAND_WAIT_TIME;
}
void setup()
{
pinMode(13, OUTPUT); // LED
pinMode(2, INPUT); // DATA0 (INT0)
pinMode(3, INPUT); // DATA1 (INT1)
Serial.begin(9600);
Serial.println("RFID Readers");
// binds the ISR functions to the falling edge of INTO and INT1
attachInterrupt(0, ISR_INT0, FALLING);
attachInterrupt(1, ISR_INT1, FALLING);
weigand_counter = WEIGAND_WAIT_TIME;
}
void loop()
{
// This waits to make sure that there have been no more data pulses before processing data
if (!flagDone) {
if (--weigand_counter == 0)
flagDone = 1;
}
// if we have bits and we the weigand counter went out
if (bitCount > 0 && flagDone) {
unsigned char i;
lcd.begin (20,4);
// Switch on the backlight
lcd.setBacklightPin(BACKLIGHT_PIN,POSITIVE);
lcd.setBacklight(HIGH);
lcd.home (); // go home
lcd.print("Read ");
lcd.print(bitCount);
lcd.print(" bits. ");
Serial.print("Read ");
Serial.print(bitCount);
Serial.print(" bits. ");
lcd.setCursor ( 0, 1 ); // go to the 2nd line
// we will decode the bits differently depending on how many bits we have
// see www.pagemac.com/azure/data_formats.php for mor info
if (bitCount == 35)
{
// 35 bit HID Corporate 1000 format
// facility code = bits 2 to 14
for (i=2; i<14; i++)
{
facilityCode <<=1;
facilityCode |= databits[i];
}
// card code = bits 15 to 34
for (i=14; i<34; i++)
{
cardCode <<=1;
cardCode |= databits[i];
}
printBits();
}
else if (bitCount == 26)
{
// standard 26 bit format
// facility code = bits 2 to 9
for (i=1; i<9; i++)
{
facilityCode <<=1;
facilityCode |= databits[i];
}
// card code = bits 10 to 23
for (i=9; i<25; i++)
{
cardCode <<=1;
cardCode |= databits[i];
}
printBits();
}
else {
// you can add other formats if you want!
lcd.println("Unable to decode.");
}
// cleanup and get ready for the next card
bitCount = 0;
facilityCode = 0;
cardCode = 0;
for (i=0; i<MAX_BITS; i++)
{
databits[i] = 0;
}
}
}
void printBits()
{
// I really hope you can figure out what this function does
lcd.print("FC = ");
lcd.print(facilityCode);
lcd.setCursor ( 0, 2 ); // go to the third line
lcd.print("Card number = ");
lcd.setCursor ( 0, 3 ); // go to the third line
lcd.println(cardCode);
Serial.print("FAC CODE = ");
Serial.print(facilityCode);
Serial.print(", CARD NUMBER = ");
Serial.println(cardCode);
=x
}