I dette indlæg skal vi konstruere et RFID-baseret tilstedeværelsessystem, der kan registrere deltagelse af 12 studerende / stabe i et givet tidsvindue, og dette system kan registrere op til 255 fremmøde pr. Person.

Hvad er RFID-tilstedeværelsessystem

Vi har ikke brug for nogen introduktion vedrørende det RFID-baserede tilstedeværelsessystem, det bruges i gymnasier, kontorer, biblioteker for at vide, hvor mange gange en person eller hvor mange mennesker er kommet ind og ud på hvilket tidspunkt.

I dette projekt konstruerer vi et enkleste RFID-baserede tilstedeværelsessystem, der ikke overkomplicerer projektet.

“siges at være kommunikationssignaler repræsenteret i et binært format ”

I dette projekt vil vi bruge RTC-modul, der bruges til at aktivere og deaktivere fremmøde inden for en given tidsperiode, så vi kan holde de sene komme i skak.

RFID-modulet “RFID-RC522”, der kan læse og skrive operationer på NXP-baserede RFID-tags. NXP er førende producent af RFID-tags i verden, og vi kan nemt få dem til online og offline butikker.

En 16 x 2 LCD-skærm bruges til at fremvise information såsom tid, dato, antal fremmøde osv.

Og endelig anvendes et Arduino-kort, som er projektets hjerne . Du kan vælge en hvilken som helst version af tavlen.

Lad os nu gå videre til skematiske diagrammer:

Arduino til LCD-skærmforbindelse:

Tilslut bare ledningerne i henhold til nedenstående diagram og brug 10 kilo ohm potentiometer til at justere kontrasten.

Arduino til RFID-modulforbindelse:

RFID-modulet skal have strøm fra 3,3V og 5V kan beskadige komponenterne om bord. RFID-RC522-modulet fungerer på SPI-kommunikationsprotokol, mens det kommunikerer med Arduino.

Resten af kredsløbet:

Arduino kan få strøm fra 9V vægadapter. Der er en summer og LED, der indikerer, at kortet registreres. Der findes 4 knapper til visning af fremmøde, rydning af hukommelsen og “ja” og “nej” knapperne.

Det afslutter hardwaredelen.

Download venligst følgende biblioteksfiler:

Link1: github.com/PaulStoffregen/DS1307RTC

Link2: github.com/PaulStoffregen/Time

Link3: github.com/miguelbalboa/rfid.git

Nu skal vi indstille det rigtige tidspunkt til RTC-modulet for at gøre dette, følg nedenstående trin med afsluttet hardwareopsætning.

Åbn Arduino IDE.
Naviger til Fil> Eksempler> DS1307RTC> SetTime.
Upload koden.

Når koden er uploadet til Arduino, åbn den serielle skærm . Nu er RTC synkroniseret med tidspunktet for din computer.

Nu skal du finde UID eller unikt identifikationsnummer på alle 12 RFID-kort / tags. For at finde UID skal du uploade nedenstående kode og åbne den serielle skærm.

//-------------------------Program developed by R.Girish------------------// #include #include #define SS_PIN 10 #define RST_PIN 9 MFRC522 rfid(SS_PIN, RST_PIN) MFRC522::MIFARE_Key key void setup() { Serial.begin(9600) SPI.begin() rfid.PCD_Init() } void loop() { if ( ! rfid.PICC_IsNewCardPresent()) return if ( ! rfid.PICC_ReadCardSerial()) return MFRC522::PICC_Type piccType = rfid.PICC_GetType(rfid.uid.sak) if (piccType != MFRC522::PICC_TYPE_MIFARE_MINI && piccType != MFRC522::PICC_TYPE_MIFARE_1K && piccType != MFRC522::PICC_TYPE_MIFARE_4K) { Serial.println(F('Your tag is not of type MIFARE Classic, your card/tag can't be read :(')) return } String StrID = '' for (byte i = 0 i <4 i ++) { StrID += (rfid.uid.uidByte[i] <0x10 ? '0' : '') + String(rfid.uid.uidByte[i], HEX) + (i != 3 ? ':' : '' ) } StrID.toUpperCase() Serial.print('Your card's UID: ') Serial.println(StrID) rfid.PICC_HaltA () rfid.PCD_StopCrypto1 () } //-------------------------Program developed by R.Girish------------------//

Åbn seriel skærm.
Scan kortet / mærket på RFID-modulet.
Nu vil du se en hexadecimal kode for hvert kort.
Skriv det ned, vi indtaster disse data i det næste program.

Hovedprogrammet:

//-------------------------Program developed by R.Girish------------------// #include #include #include #include #include #include #include #define SS_PIN 10 #define RST_PIN 9 MFRC522 rfid(SS_PIN, RST_PIN) MFRC522::MIFARE_Key key const int rs = 7 const int en = 6 const int d4 = 5 const int d5 = 4 const int d6 = 3 const int d7 = 2 const int LED = 8 boolean ok = false LiquidCrystal lcd(rs, en, d4, d5, d6, d7) const int list = A0 const int CLM = A1 const int yes = A2 const int no = A3 int H = 0 int M = 0 int S = 0 int i = 0 int ID1 = 0 int ID2 = 0 int ID3 = 0 int ID4 = 0 int ID5 = 0 int ID6 = 0 int ID7 = 0 int ID8 = 0 int ID9 = 0 int ID10 = 0 int ID11 = 0 int ID12 = 0 char UID[] = '' // **************************** SETTINGS ************************ // // ------ From -------- // (Set the time range for attendance in hours 0 to 23) int h = 21 // Hrs int m = 00 // Min // ------- To ------- // int h1 = 21 // Hrs int m1 = 50 //Min // ---------------- SET UIDs ----------------- // char UID1[] = 'F6:97:ED:70' char UID2[] = '45:B8:AF:C0' char UID3[] = '15:9F:A5:C0' char UID4[] = 'C5:E4:AD:C0' char UID5[] = '65:1D:AF:C0' char UID6[] = '45:8A:AF:C0' char UID7[] = '15:9F:A4:C0' char UID8[] = '55:CB:AF:C0' char UID9[] = '65:7D:AF:C0' char UID10[] = '05:2C:AA:04' char UID11[] = '55:7D:AA:04' char UID12[] = 'BD:8A:16:0B' // -------------- NAMES -----------------------// char Name1[] = 'Student1' char Name2[] = 'Student2' char Name3[] = 'Student3' char Name4[] = 'Student4' char Name5[] = 'Student5' char Name6[] = 'Student6' char Name7[] = 'Student7' char Name8[] = 'Student8' char Name9[] = 'Student9' char Name10[] = 'Student10' char Name11[] = 'Student11' char Name12[] = 'Student12' // ********************************************************** // void setup() { Serial.begin(9600) lcd.begin(16, 2) SPI.begin() rfid.PCD_Init() pinMode(yes, INPUT) pinMode(no, INPUT) pinMode(list, INPUT) pinMode(LED, OUTPUT) pinMode(CLM, INPUT) digitalWrite(CLM, HIGH) digitalWrite(LED, LOW) digitalWrite(yes, HIGH) digitalWrite(no, HIGH) digitalWrite(list, HIGH) } void loop() { if (digitalRead(list) == LOW) { Read_data() } if (digitalRead(CLM) == LOW) { clear_Memory() } tmElements_t tm if (RTC.read(tm)) { lcd.clear() H = tm.Hour M = tm.Minute S = tm.Second lcd.setCursor(0, 0) lcd.print('TIME:') lcd.print(tm.Hour) lcd.print(':') lcd.print(tm.Minute) lcd.print(':') lcd.print(tm.Second) lcd.setCursor(0, 1) lcd.print('DATE:') lcd.print(tm.Day) lcd.print('/') lcd.print(tm.Month) lcd.print('/') lcd.print(tmYearToCalendar(tm.Year)) delay(1000) } else { if (RTC.chipPresent()) { lcd.setCursor(0, 0) lcd.print('RTC stopped!!!') lcd.setCursor(0, 1) lcd.print('Run SetTime code') } else { lcd.clear() lcd.setCursor(0, 0) lcd.print('Read error!') lcd.setCursor(0, 1) lcd.print('Check circuitry!') } } if (H == h) { if (M == m) { ok = true } } if (H == h1) { if (M == m1) { ok = false } } if ( ! rfid.PICC_IsNewCardPresent()) return if ( ! rfid.PICC_ReadCardSerial()) return MFRC522::PICC_Type piccType = rfid.PICC_GetType(rfid.uid.sak) if (piccType != MFRC522::PICC_TYPE_MIFARE_MINI && piccType != MFRC522::PICC_TYPE_MIFARE_1K && piccType != MFRC522::PICC_TYPE_MIFARE_4K) { Serial.println(F('Your tag is not of type MIFARE Classic, your card/tag can't be read :(')) } String StrID = '' for (byte i = 0 i <4 i ++) { StrID += (rfid.uid.uidByte[i] <0x10 ? '0' : '') + String(rfid.uid.uidByte[i], HEX) + (i != 3 ? ':' : '' ) } StrID.toUpperCase() if (ok == false) { lcd.clear() lcd.setCursor(0, 0) lcd.print('Attendance is') lcd.setCursor(0, 1) lcd.print('Closed.') delay(1000) } if (ok) { //-----------------------------------// if (StrID == UID1) { ID1 = EEPROM.read(1) ID1 = ID1 + 1 if (ID1 == 256) { lcd.clear() lcd.setCursor(0, 0) lcd.print('Memory is Full') lcd.setCursor(0, 1) lcd.print('Please Clear All.') for (i = 0 i <20 i++) { digitalWrite(LED, HIGH) delay(100) digitalWrite(LED, LOW) delay(100) } i = 0 return } if (ID1 != 256) { EEPROM.write(1, ID1) lcd.clear() lcd.setCursor(0, 0) lcd.print('Your Attendance') lcd.setCursor(0, 1) lcd.print('Registered !!!') digitalWrite(LED, HIGH) delay(1000) digitalWrite(LED, LOW) return } } //-----------------------------------// if (StrID == UID2) { ID2 = EEPROM.read(2) ID2 = ID2 + 1 if (ID2 == 256) { lcd.clear() lcd.setCursor(0, 0) lcd.print('Memory is Full') lcd.setCursor(0, 1) lcd.print('Please Clear All.') for (i = 0 i <20 i++) { digitalWrite(LED, HIGH) delay(100) digitalWrite(LED, LOW) delay(100) } i = 0 return } if (ID2 != 256) { EEPROM.write(2, ID2) lcd.clear() lcd.setCursor(0, 0) lcd.print('Your Attendance') lcd.setCursor(0, 1) lcd.print('Registered !!!') digitalWrite(LED, HIGH) delay(1000) digitalWrite(LED, LOW) return } } //-----------------------------------// if (StrID == UID3) { ID3 = EEPROM.read(3) ID3 = ID3 + 1 if (ID3 == 256) { lcd.clear() lcd.setCursor(0, 0) lcd.print('Memory is Full') lcd.setCursor(0, 1) lcd.print('Please Clear All.') for (i = 0 i <20 i++) { digitalWrite(LED, HIGH) delay(100) digitalWrite(LED, LOW) delay(100) } i = 0 return } if (ID3 != 256) { EEPROM.write(3, ID3) lcd.clear() lcd.setCursor(0, 0) lcd.print('Your Attendance') lcd.setCursor(0, 1) lcd.print('Registered !!!') digitalWrite(LED, HIGH) delay(1000) digitalWrite(LED, LOW) return } } //-----------------------------------// if (StrID == UID4) { ID4 = EEPROM.read(4) ID4 = ID4 + 1 if (ID4 == 256) { lcd.clear() lcd.setCursor(0, 0) lcd.print('Memory is Full') lcd.setCursor(0, 1) lcd.print('Please Clear All.') for (i = 0 i <20 i++) { digitalWrite(LED, HIGH) delay(100) digitalWrite(LED, LOW) delay(100) } i = 0 return } if (ID4 != 256) { EEPROM.write(4, ID4) lcd.clear() lcd.setCursor(0, 0) lcd.print('Your Attendance') lcd.setCursor(0, 1) lcd.print('Registered !!!') digitalWrite(LED, HIGH) delay(1000) digitalWrite(LED, LOW) return } } //-----------------------------------// if (StrID == UID5) { ID5 = EEPROM.read(5) ID5 = ID5 + 1 if (ID5 == 256) { lcd.clear() lcd.setCursor(0, 0) lcd.print('Memory is Full') lcd.setCursor(0, 1) lcd.print('Please Clear All.') for (i = 0 i <20 i++) { digitalWrite(LED, HIGH) delay(100) digitalWrite(LED, LOW) delay(100) } i = 0 return } if (ID5 != 256) { EEPROM.write(5, ID5) lcd.clear() lcd.setCursor(0, 0) lcd.print('Your Attendance') lcd.setCursor(0, 1) lcd.print('Registered !!!') digitalWrite(LED, HIGH) delay(1000) digitalWrite(LED, LOW) return } } //-----------------------------------// if (StrID == UID6) { ID6 = EEPROM.read(6) ID6 = ID6 + 1 if (ID6 == 256) { lcd.clear() lcd.setCursor(0, 0) lcd.print('Memory is Full') lcd.setCursor(0, 1) lcd.print('Please Clear All.') for (i = 0 i <20 i++) { digitalWrite(LED, HIGH) delay(100) digitalWrite(LED, LOW) delay(100) } i = 0 return } if (ID6 != 256) { EEPROM.write(6, ID6) lcd.clear() lcd.setCursor(0, 0) lcd.print('Your Attendance') lcd.setCursor(0, 1) lcd.print('Registered !!!') digitalWrite(LED, HIGH) delay(1000) digitalWrite(LED, LOW) return } } //-----------------------------------// if (StrID == UID7) { ID7 = EEPROM.read(7) ID7 = ID7 + 1 if (ID7 == 256) { lcd.clear() lcd.setCursor(0, 0) lcd.print('Memory is Full') lcd.setCursor(0, 1) lcd.print('Please Clear All.') for (i = 0 i <20 i++) { digitalWrite(LED, HIGH) delay(100) digitalWrite(LED, LOW) delay(100) } i = 0 return } if (ID7 != 256) { EEPROM.write(7, ID7) lcd.clear() lcd.setCursor(0, 0) lcd.print('Your Attendance') lcd.setCursor(0, 1) lcd.print('Registered !!!') digitalWrite(LED, HIGH) delay(1000) digitalWrite(LED, LOW) return } } //-----------------------------------// if (StrID == UID8) { ID8 = EEPROM.read(8) ID8 = ID1 + 1 if (ID8 == 256) { lcd.clear() lcd.setCursor(0, 0) lcd.print('Memory is Full') lcd.setCursor(0, 1) lcd.print('Please Clear All.') for (i = 0 i <20 i++) { digitalWrite(LED, HIGH) delay(100) digitalWrite(LED, LOW) delay(100) } i = 0 return } if (ID8 != 256) { EEPROM.write(8, ID8) lcd.clear() lcd.setCursor(0, 0) lcd.print('Your Attendance') lcd.setCursor(0, 1) lcd.print('Registered !!!') digitalWrite(LED, HIGH) delay(1000) digitalWrite(LED, LOW) return } } //-----------------------------------// if (StrID == UID9) { ID9 = EEPROM.read(9) ID9 = ID9 + 1 if (ID9 == 256) { lcd.clear() lcd.setCursor(0, 0) lcd.print('Memory is Full') lcd.setCursor(0, 1) lcd.print('Please Clear All.') for (i = 0 i <20 i++) { digitalWrite(LED, HIGH) delay(100) digitalWrite(LED, LOW) delay(100) } i = 0 return } if (ID9 != 256) { EEPROM.write(9, ID9) lcd.clear() lcd.setCursor(0, 0) lcd.print('Your Attendance') lcd.setCursor(0, 1) lcd.print('Registered !!!') digitalWrite(LED, HIGH) delay(1000) digitalWrite(LED, LOW) return } } //-----------------------------------// if (StrID == UID10) { ID10 = EEPROM.read(10) ID10 = ID10 + 1 if (ID10 == 256) { lcd.clear() lcd.setCursor(0, 0) lcd.print('Memory is Full') lcd.setCursor(0, 1) lcd.print('Please Clear All.') for (i = 0 i <20 i++) { digitalWrite(LED, HIGH) delay(100) digitalWrite(LED, LOW) delay(100) } i = 0 return } if (ID10 != 256) { EEPROM.write(10, ID10) lcd.clear() lcd.setCursor(0, 0) lcd.print('Your Attendance') lcd.setCursor(0, 1) lcd.print('Registered !!!') digitalWrite(LED, HIGH) delay(1000) digitalWrite(LED, LOW) return } } //-----------------------------------// if (StrID == UID11) { ID11 = EEPROM.read(11) ID11 = ID11 + 1 if (ID11 == 256) { lcd.clear() lcd.setCursor(0, 0) lcd.print('Memory is Full') lcd.setCursor(0, 1) lcd.print('Please Clear All.') for (i = 0 i <20 i++) { digitalWrite(LED, HIGH) delay(100) digitalWrite(LED, LOW) delay(100) } i = 0 return } if (ID11 != 256) { EEPROM.write(11, ID11) lcd.clear() lcd.setCursor(0, 0) lcd.print('Your Attendance') lcd.setCursor(0, 1) lcd.print('Registered !!!') digitalWrite(LED, HIGH) delay(1000) digitalWrite(LED, LOW) return } } //-----------------------------------// if (StrID == UID12) { ID12 = EEPROM.read(12) ID12 = ID12 + 1 if (ID12 == 256) { lcd.clear() lcd.setCursor(0, 0) lcd.print('Memory is Full') lcd.setCursor(0, 1) lcd.print('Please Clear All.') for (i = 0 i <20 i++) { digitalWrite(LED, HIGH) delay(100) digitalWrite(LED, LOW) delay(100) } i = 0 return } if (ID12 != 256) { EEPROM.write(12, ID12) lcd.clear() lcd.setCursor(0, 0) lcd.print('Your Attendance') lcd.setCursor(0, 1) lcd.print('Registered !!!') digitalWrite(LED, HIGH) delay(1000) digitalWrite(LED, LOW) return } } if (StrID != UID1 || StrID != UID2 || StrID != UID3 || StrID != UID4 || StrID != UID5 || StrID != UID6 || StrID != UID7 || StrID != UID8 || StrID != UID9 || StrID != UID10 || StrID != UID11 || StrID != UID12) { lcd.clear() lcd.setCursor(0, 0) lcd.print('Unknown RFID') lcd.setCursor(0, 1) lcd.print('Card !!!') for (i = 0 i <3 i++) { digitalWrite(LED, HIGH) delay(200) digitalWrite(LED, LOW) delay(200) } } rfid.PICC_HaltA () rfid.PCD_StopCrypto1() } } void Read_data() { lcd.clear() lcd.setCursor(0, 0) lcd.print(Name1) lcd.print(':') lcd.print(EEPROM.read(1)) lcd.setCursor(0, 1) lcd.print(Name2) lcd.print(':') lcd.print(EEPROM.read(2)) delay(2000) lcd.clear() lcd.setCursor(0, 0) lcd.print(Name3) lcd.print(':') lcd.print(EEPROM.read(3)) lcd.setCursor(0, 1) lcd.print(Name4) lcd.print(':') lcd.print(EEPROM.read(4)) delay(2000) lcd.clear() lcd.setCursor(0, 0) lcd.print(Name5) lcd.print(':') lcd.print(EEPROM.read(5)) lcd.setCursor(0, 1) lcd.print(Name6) lcd.print(':') lcd.print(EEPROM.read(6)) delay(2000) lcd.clear() lcd.setCursor(0, 0) lcd.print(Name7) lcd.print(':') lcd.print(EEPROM.read(7)) lcd.setCursor(0, 1) lcd.print(Name8) lcd.print(':') lcd.print(EEPROM.read(8)) delay(2000) lcd.clear() lcd.setCursor(0, 0) lcd.print(Name9) lcd.print(':') lcd.print(EEPROM.read(9)) lcd.setCursor(0, 1) lcd.print(Name10) lcd.print(':') lcd.print(EEPROM.read(10)) delay(2000) lcd.clear() lcd.setCursor(0, 0) lcd.print(Name11) lcd.print(':') lcd.print(EEPROM.read(11)) lcd.setCursor(0, 1) lcd.print(Name12) lcd.print(':') lcd.print(EEPROM.read(12)) delay(2000) } void clear_Memory() { lcd.clear() lcd.print(0, 0) lcd.print(F('Clear All Data?')) lcd.setCursor(0, 1) lcd.print(F('Long press: Y/N')) delay(2500) Serial.print('YES') if (digitalRead(yes) == LOW) { EEPROM.write(1, 0) EEPROM.write(2, 0) EEPROM.write(3, 0) EEPROM.write(4, 0) EEPROM.write(5, 0) EEPROM.write(6, 0) EEPROM.write(7, 0) EEPROM.write(8, 0) EEPROM.write(9, 0) EEPROM.write(10, 0) EEPROM.write(11, 0) EEPROM.write(12, 0) lcd.clear() lcd.setCursor(0, 0) lcd.print(F('All Data Cleared')) lcd.setCursor(0, 1) lcd.print(F('****************')) delay(1500) } if (digitalRead(no) == LOW) { return } } //-------------------------Program developed by R.Girish------------------//

// ---------------- SÆT UID'er ----------------- //

char UID1 [] = 'F6: 97: ED: 70'

char UID2[] = '45:B8:AF:C0'

char UID3 [] = '15: 9F: A5: C0 '

char UID4 [] = 'C5: E4: AD: C0'

char UID5[] = '65:1D:AF:C0'

char UID6[] = '45:8A:AF:C0'

char UID7 [] = '15: 9F: A4: C0 '

char UID8[] = '55:CB:AF:C0'

char UID9 [] = '65: 7D: AF: C0 '

char UID10 [] = '05: 2C: AA: 04 '

char UID11 [] = '55: 7D: AA: 04 '

char UID12 [] = 'BD: 8A: 16: 0B'

// ---------------------------------------------- //

Du har stednavne her:

// -------------- NAVNE ----------------------- //

char Name1 [] = 'Student1'

char Name2 [] = 'Student2'

char Name3 [] = 'Student3'

char Name4 [] = 'Student4'

char Name5 [] = 'Student5'

char Name6 [] = 'Student6'

char Name7 [] = 'Student7'

char Name8 [] = 'Student8'

char Name9 [] = 'Student9'

char Name10 [] = 'Student10'

char Name11 [] = 'Student11'

char Name12 [] = 'Student12'

// -------------------------------------------- //

Udskift student1, student2 med ethvert navn, du ønsker, eller lad det være som det er.

Du er nødt til at indstille tiden fra, hvornår til fremmøde-systemet skal være aktivt, resten af tiden vil systemet ikke registrere fremmøde, når vi scanner RFID-tag / kort:

// ------ Fra -------- //

int h = 21 // timer

int m = 00 // Min

// ------- Til ------- //

int h1 = 21 // Hrs

int m1 = 50 // Min

// ------------------------- //

Den øverste del er starttidspunkt, og den nederste del er sluttidspunktet. Du skal indtaste tid i timer fra 0 til 23 og minutter fra 00 til 59.