HI, i hope is ok posting my question here, i tried asking for help on the Arduino cc forum and people on there are very unhelpful to my surprise.
i am trying to set up a door opener which uses a keypad or Rfid.
After scouring the net for days i could only find one project which did this, absolutely everything else out there expects you to use an Rfid tag and then input a passcode on the keypad, not one or the other.
The creator of this code actually made two almost identical versions, the second just adding Bluetooth.
The first displayed correctly on the lcd but both the keypad and rfid functions were broken.
The second version which is what im trying to get working is sort of working.
The passcode on the keypad works and triggers the output pin to trigger the relay and the led outputs work correctly.
The Display is broken, it only displays the first character of messages but for some reason it displays all of the ‘x’ characters correctly when inputting the passcode?
it would be nice if i could get it displaying the messages in full instead of just the first character but its not something i need as i only intended to have the lcd on the inside of the door to display status when pairing Rfid tags ect and will be using two leds with the keypad outside.
The Bluetooth is broken, it does not respond to codes being sent but the arduino is being sent the data as you can see the rx led on the board blink but i really dont care about the Bluetooth as i have no intention of using it or even having a module connected and just thought id have a play with it in testing.
Now for the important part, the Rfid is broken.
The module (RC522) sees tags just fine, the arduino responds and tag numbers are displayed in serial monitor.
putting in the keypad code to enter pairing mode works fine and when you present a tag the it says its been paired (well one character on the lcd but i know what it means lol) and it also says its been paired in serial monitor but it does not store the tag and subsequent reads of that tag will generate the ‘invalid NFC code’ message and does not trigger the relay output pin.
The code has a section about storing tags to the eeprom but this is clearly not happening but i cannot code Arduino, i just about manage to read existing codes and modify certain things for slightly different behaviour and this is beyond my ability.
Please could someone read though the code (its not huge) and see if they can figure out why its not storing tags please?
If the messages not being displayed is a simple thing then that would be great too but that’s not really important, i just want the physical side working.
ive looked at the lcd code and its baffled me as the original sketch where none of the physical functions worked, the lcd code worked fine and messages were correctly displayed, ive examined and compared the code between the two different sketches and cant see any difference so no idea why it would only display the first character :smiley-confuse:
The Rfid tags being stored is the only thing i really want to fix or even just know if i can manually enter tag serials into the code anything else is a bonus, ive looked at the code to see if i can manually input tag numbers and ive tried a couple of places that looked like code sections but nothing worked.
Your help would be really appreciated!
Thanks, Steve.
#include <EEPROM.h>
#include <SPI.h>
#include <MFRC522.h>
#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include <Keypad.h>
int state_bt=1;
int relPin;
int stare=0;
byte COD[10];
byte AUX[10];
int k=0;
String codacces="*123456#";
String codpairing="*654321#";
//nfc
#define RST_PIN 9 // Configurable, see typical pin layout above
#define SS_PIN 10 // Configurable, see typical pin layout above
MFRC522 mfrc522(SS_PIN, RST_PIN); // Create MFRC522 instance
#define NEW_UID {0xDE, 0xAD, 0xBE, 0xEF}
MFRC522::MIFARE_Key key;
//lcd
LiquidCrystal_I2C lcd(0x27,16,2);
//TASTATURA
const byte numRows= 4; //number of rows on the keypad
const byte numCols= 3; //number of columns on the keypad
//keymap defines the key pressed according to the row and columns just as appears on the keypad
char keymap[numRows][numCols]=
{
{'1', '2', '3',},
{'4', '5', '6',},
{'7', '8', '9',},
{'*', '0', '#',}
};
//Code that shows the the keypad connections to the arduino terminals
byte rowPins[numRows] = {5, A0, 7, 8}; //Rows 0 to 3
byte colPins[numCols]= {2, 3, 4}; //Columns 0 to 3
//initializes an instance of the Keypad class
Keypad myKeypad= Keypad(makeKeymap(keymap), rowPins, colPins, numRows, numCols);
void setup() {
pinMode(A0,OUTPUT);
digitalWrite(A0,HIGH);
pinMode(A3,OUTPUT);
digitalWrite(A3,HIGH);
pinMode(A1,OUTPUT);
digitalWrite(A1,HIGH);
pinMode(A2,OUTPUT);
digitalWrite(A2,LOW);
pinMode(6,OUTPUT);
digitalWrite(6,LOW);
//nfc
Serial.begin(9600); // Initialize serial communications with the PC
Serial.println("What did you say?:");
while (!Serial); // Do nothing if no serial port is opened (added for Arduinos based on ATMEGA32U4)
SPI.begin(); // Init SPI bus
mfrc522.PCD_Init(); // Init MFRC522 card
for (byte i = 0; i < 6; i++) {
key.keyByte = 0xFF;
}
lcd.init();
lcd.backlight();
lcd.setCursor(0,0);
lcd.clear();
lcd.print( "LOCKED" );
}
void citireNFC(){
for (byte i =0; i<(mfrc522.uid.size); i++) {
COD=mfrc522.uid.uidByte;
}
Serial.print("COD");
Serial.print(COD[0]);
Serial.print(COD[1]);
Serial.print(COD[2]);
Serial.print(COD[3]);
}
void pairNFC(){
Serial.println("COD in pair");
Serial.print(COD[0]);
Serial.print(COD[1]);
Serial.print(COD[2]);
Serial.print(COD[3]);
long r=0;
int c=0;
for(int i=1;i<=EEPROM.read(0);i++){
switch(i%4){
case 1 :{AUX[0]=EEPROM.read(i); break;}
case 2 :{AUX[1]=EEPROM.read(i); break;}
case 3 :{AUX[2]=EEPROM.read(i); break;}
case 0 :{AUX[3]=EEPROM.read(i); break;}
}
if((i)%4==0)
{Serial.println(r);
if( AUX[0]==COD[0] && AUX[1]==COD[1] && AUX[2]==COD[2] && AUX[3]==COD[3] ){
lcd.clear();
lcd.setCursor(0,0);
lcd.print("CODE ALREADY IN");
lcd.setCursor(0,1);
lcd.print("SYSTEM");
delay(2000);
c=1;
break;}
}
}
if(c==0){int ttt=EEPROM.read(0);
Serial.println("CODE PAIRED");
Serial.print(COD[0]);
Serial.print(COD[1]);
Serial.print(COD[2]);
Serial.print(COD[3]);
EEPROM.write(ttt+1,COD[0]);
EEPROM.write(ttt+2,COD[1]);
EEPROM.write(ttt+3,COD[2]);
EEPROM.write(ttt+4,COD[3]);
ttt=ttt+4;
Serial.println("ttt");
Serial.println(ttt);
EEPROM.write(0,0);
EEPROM.write(0,ttt);
lcd.clear();
lcd.setCursor(0,0);
lcd.print("CODE PAIRED");
delay(2000);}
}
boolean validareNFC(){
boolean c=false;
for(int i=1;i<=EEPROM.read(0);i++){
switch(i%4){
case 1 :{AUX[0]=EEPROM.read(i); break;}
case 2 :{AUX[1]=EEPROM.read(i); break;}
case 3 :{AUX[2]=EEPROM.read(i); break;}
case 0 :{AUX[3]=EEPROM.read(i); break;}
}
if((i)%4==0)
{
if( AUX[0]==COD[0] && AUX[1]==COD[1] && AUX[2]==COD[2] && AUX[3]==COD[3])
c=true;
}}
return c;
}
int comparareCOD(String a)
{
if(a.equals(codacces))
return 1;
else if(a.equals(codpairing)) return 2;
else return 0;
}
String iaCOD(char x)
{ char vec[10];
vec[0]=x;
lcd.setCursor(0,0);
lcd.clear();
lcd.print('X');
for(int i=1;i<8;i++)
{vec=myKeypad.waitForKey();
lcd.print('X');}
vec[8]=NULL;
String str(vec);
return str;
}
void loop() {
//Start BT autentification
if(Serial.available())
{
char c=Serial.read();
switch (state_bt) {
case 1:
if(c=='*') state_bt=2;
else state_bt=1;
break;
case 2:
if(c=='1') state_bt=3;
else state_bt=1;
break;
case 3:
if(c=='2') state_bt=4;
else state_bt=1;
break;
case 4:
if(c=='3') state_bt=5;
else state_bt=1;
break;
case 5:
if(c=='4') state_bt=6;
else state_bt=1;
break;
case 6:
if(c=='5') state_bt=7;
else state_bt=1;
break;
case 7:
if(c=='6') state_bt=8;
else state_bt=1;
break;
case 8:
if(c=='#') state_bt=9;
else state_bt=1;
break;
case 9:
lcd.init();
lcd.backlight();
lcd.print("OPEN");
digitalWrite(6,LOW);
delay(5000);
digitalWrite(6,HIGH);
lcd.init();
lcd.backlight();
lcd.print("BLOCKED");
state_bt=1;
break;
default:
break;
}
}
//////////END BT Autentification
switch(stare){
case 0: {
mfrc522.PCD_Init();
if ( mfrc522.PICC_IsNewCardPresent() && mfrc522.PICC_ReadCardSerial() ){
citireNFC();
if(validareNFC())
{stare=1;
lcd.clear();
lcd.setCursor(0,0);
lcd.print("VALID NFC CODE");
delay(1000);
return;
}
else{
lcd.clear();
lcd.setCursor(0,0);
lcd.print("INVALID NFC CODE");
delay(1000);
lcd.setCursor(0,0);
lcd.clear();
lcd.print("BLOCKED");
return;
}
}
char c=myKeypad.getKey();
if(c != NO_KEY){
String codcurent=iaCOD(c);
int A=comparareCOD(codcurent);
if(A==0)
{lcd.clear();
lcd.print("INVALID CODE");
delay(2000);
lcd.setCursor(0,0);
lcd.clear();
lcd.print("BLOCKED");
return;}
if(A==1)
{lcd.setCursor(0,0);
lcd.clear();
lcd.print("VALID CODE");
delay(2000);
stare = 1;
return;}
if(A==2);
{stare=2;
lcd.clear();
lcd.setCursor(0,0);
lcd.print("Pairing...");
delay(2000);
return;}
} break;
}
case 1:{
lcd.clear();
lcd.setCursor(0,0);
lcd.print("UNLOCKED");
digitalWrite(A3,LOW);
digitalWrite(A1,LOW);
digitalWrite(A2,HIGH);
//tone(6,3000,5010);
digitalWrite(6,HIGH);
delay(2000);
digitalWrite(6,LOW);
digitalWrite(A3,HIGH);
digitalWrite(A1,HIGH);
digitalWrite(A2,LOW);
stare=0;
lcd.setCursor(0,0);
lcd.clear();
lcd.print("BLOCKED");
return;
}
case 2:{
mfrc522.PCD_Init();
if ( mfrc522.PICC_IsNewCardPresent() && mfrc522.PICC_ReadCardSerial() ){
citireNFC();
pairNFC();
stare=0;
delay(2000);
lcd.clear();
lcd.setCursor(0,0);
lcd.print("BLOCKED"); }
break;
}
}
}
