Access Control sketch, modified from the example in the MFRC522 library for Arduino IDE
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| /* | |
| * -------------------------------------------------------------------------------------------------------------------- | |
| * Example sketch/program showing An Arduino Door Access Control featuring RFID, EEPROM, Relay | |
| * -------------------------------------------------------------------------------------------------------------------- | |
| * This is a MFRC522 library example; for further details and other examples see: https://github.com/miguelbalboa/rfid | |
| * | |
| * This example showing a complete Door Access Control System | |
| Simple Work Flow (not limited to) : | |
| +---------+ | |
| +----------------------------------->READ TAGS+^------------------------------------------+ | |
| | +--------------------+ | | |
| | | | | | |
| | | | | | |
| | +----v-----+ +-----v----+ | | |
| | |MASTER TAG| |OTHER TAGS| | | |
| | +--+-------+ ++-------------+ | | |
| | | | | | | |
| | | | | | | |
| | +-----v---+ +----v----+ +----v------+ | | |
| | +------------+READ TAGS+---+ |KNOWN TAG| |UNKNOWN TAG| | | |
| | | +-+-------+ | +-----------+ +------------------+ | | |
| | | | | | | | | |
| | +----v-----+ +----v----+ +--v--------+ +-v----------+ +------v----+ | | |
| | |MASTER TAG| |KNOWN TAG| |UNKNOWN TAG| |GRANT ACCESS| |DENY ACCESS| | | |
| | +----------+ +---+-----+ +-----+-----+ +-----+------+ +-----+-----+ | | |
| | | | | | | | |
| | +----+ +----v------+ +--v---+ | +---------------> | |
| +-------+EXIT| |DELETE FROM| |ADD TO| | | | |
| +----+ | EEPROM | |EEPROM| | | | |
| +-----------+ +------+ +-------------------------------+ | |
| * | |
| * Use a Master Card which is act as Programmer then you can able to choose card holders who will granted access or not | |
| * | |
| * **Easy User Interface** | |
| * | |
| * Just one RFID tag needed whether Delete or Add Tags. You can choose to use Leds for output or Serial LCD module to inform users. | |
| * | |
| * **Stores Information on EEPROM** | |
| * | |
| * Information stored on non volatile Arduino's EEPROM memory to preserve Users' tag and Master Card. No Information lost | |
| * if power lost. EEPROM has unlimited Read cycle but roughly 100,000 limited Write cycle. | |
| * | |
| * **Security** | |
| * To keep it simple we are going to use Tag's Unique IDs. It's simple and not hacker proof. | |
| * | |
| * @license Released into the public domain. | |
| * | |
| * Typical pin layout used: | |
| * ----------------------------------------------------------------------------------------- | |
| * MFRC522 Arduino Arduino Arduino Arduino Arduino | |
| * Reader/PCD Uno/101 Mega Nano v3 Leonardo/Micro Pro Micro | |
| * Signal Pin Pin Pin Pin Pin Pin | |
| * ----------------------------------------------------------------------------------------- | |
| * RST/Reset RST 9 5 D9 RESET/ICSP-5 RST | |
| * SPI SS SDA(SS) 10 53 D10 10 10 | |
| * SPI MOSI MOSI 11 / ICSP-4 51 D11 ICSP-4 16 | |
| * SPI MISO MISO 12 / ICSP-1 50 D12 ICSP-1 14 | |
| * SPI SCK SCK 13 / ICSP-3 52 D13 ICSP-3 15 | |
| */ | |
| #include <EEPROM.h> // We are going to read and write PICC's UIDs from/to EEPROM | |
| #include <SPI.h> // RC522 Module uses SPI protocol | |
| #include <MFRC522.h> // Library for Mifare RC522 Devices | |
| /* | |
| Instead of a Relay you may want to use a servo. Servos can lock and unlock door locks too | |
| Relay will be used by default | |
| */ | |
| // #include <Servo.h> | |
| /* | |
| For visualizing whats going on hardware we need some leds and to control door lock a relay and a wipe button | |
| (or some other hardware) Used common anode led,digitalWriting HIGH turns OFF led Mind that if you are going | |
| to use common cathode led or just seperate leds, simply comment out #define COMMON_ANODE, | |
| */ | |
| //#define COMMON_ANODE | |
| #ifdef COMMON_ANODE | |
| #define LED_ON LOW | |
| #define LED_OFF HIGH | |
| #else | |
| #define LED_ON HIGH | |
| #define LED_OFF LOW | |
| #endif | |
| #define redLed 3 // Set Led Pins | |
| #define greenLed 4 | |
| #define blueLed 2 | |
| #define relay 5 // Set MOSFET Pin | |
| #define wipeB 6 // Button pin for WipeMode | |
| int lockDelay=10000; // lock stays open for 10 seconds. | |
| boolean match = false; // initialize card match to false | |
| boolean programMode = false; // initialize programming mode to false | |
| boolean replaceMaster = false; | |
| uint8_t successRead; // Variable integer to keep if we have Successful Read from Reader | |
| byte storedCard[4]; // Stores an ID read from EEPROM | |
| byte readCard[4]; // Stores scanned ID read from RFID Module | |
| byte masterCard[4]; // Stores master card's ID read from EEPROM | |
| // Create MFRC522 instance. | |
| #define SS_PIN 10 | |
| #define RST_PIN 9 | |
| MFRC522 mfrc522(SS_PIN, RST_PIN); | |
| ///////////////////////////////////////// Setup /////////////////////////////////// | |
| void setup() { | |
| //Arduino Pin Configuration | |
| pinMode(redLed, OUTPUT); | |
| pinMode(greenLed, OUTPUT); | |
| pinMode(blueLed, OUTPUT); | |
| pinMode(wipeB, INPUT_PULLUP); // Enable pin's pull up resistor | |
| pinMode(relay, OUTPUT); | |
| //Be careful how relay circuit behave on while resetting or power-cycling your Arduino | |
| digitalWrite(relay, LOW); // Make sure door is locked - Setting Low as Solenoid is not 100% duty cycle | |
| digitalWrite(redLed, LED_OFF); // Make sure led is off | |
| digitalWrite(greenLed, LED_OFF); // Make sure led is off | |
| digitalWrite(blueLed, LED_OFF); // Make sure led is off | |
| //Protocol Configuration | |
| Serial.begin(9600); // Initialize serial communications with PC | |
| SPI.begin(); // MFRC522 Hardware uses SPI protocol | |
| mfrc522.PCD_Init(); // Initialize MFRC522 Hardware | |
| //If you set Antenna Gain to Max it will increase reading distance | |
| //mfrc522.PCD_SetAntennaGain(mfrc522.RxGain_max); | |
| Serial.println(F("Access Control Example v0.1")); // For debugging purposes | |
| ShowReaderDetails(); // Show details of PCD - MFRC522 Card Reader details | |
| //Wipe Code - If the Button (wipeB) Pressed while setup run (powered on) it wipes EEPROM | |
| if (digitalRead(wipeB) == LOW) { // when button pressed pin should get low, button connected to ground | |
| digitalWrite(redLed, LED_ON); // Red Led stays on to inform user we are going to wipe | |
| Serial.println(F("Wipe Button Pressed")); | |
| Serial.println(F("You have 15 seconds to Cancel")); | |
| Serial.println(F("This will be remove all records and cannot be undone")); | |
| delay(15000); // Give user enough time to cancel operation | |
| if (digitalRead(wipeB) == LOW) { // If button still be pressed, wipe EEPROM | |
| Serial.println(F("Starting Wiping EEPROM")); | |
| for (uint8_t x = 0; x < EEPROM.length(); x = x + 1) { //Loop end of EEPROM address | |
| if (EEPROM.read(x) == 0) { //If EEPROM address 0 | |
| // do nothing, already clear, go to the next address in order to save time and reduce writes to EEPROM | |
| } | |
| else { | |
| EEPROM.write(x, 0); // if not write 0 to clear, it takes 3.3mS | |
| } | |
| } | |
| Serial.println(F("EEPROM Successfully Wiped")); | |
| digitalWrite(redLed, LED_OFF); // visualize a successful wipe | |
| delay(200); | |
| digitalWrite(redLed, LED_ON); | |
| delay(200); | |
| digitalWrite(redLed, LED_OFF); | |
| delay(200); | |
| digitalWrite(redLed, LED_ON); | |
| delay(200); | |
| digitalWrite(redLed, LED_OFF); | |
| } | |
| else { | |
| Serial.println(F("Wiping Cancelled")); // Show some feedback that the wipe button did not pressed for 15 seconds | |
| digitalWrite(redLed, LED_OFF); | |
| } | |
| } | |
| // Check if master card defined, if not let user choose a master card | |
| // This also useful to just redefine the Master Card | |
| // You can keep other EEPROM records just write other than 143 to EEPROM address 1 | |
| // EEPROM address 1 should hold magical number which is '143' | |
| if (EEPROM.read(1) != 143) { | |
| Serial.println(F("No Master Card Defined")); | |
| Serial.println(F("Scan A PICC to Define as Master Card")); | |
| do { | |
| successRead = getID(); // sets successRead to 1 when we get read from reader otherwise 0 | |
| digitalWrite(blueLed, LED_ON); // Visualize Master Card need to be defined | |
| delay(200); | |
| digitalWrite(blueLed, LED_OFF); | |
| delay(200); | |
| } | |
| while (!successRead); // Program will not go further while you not get a successful read | |
| for ( uint8_t j = 0; j < 4; j++ ) { // Loop 4 times | |
| EEPROM.write( 2 + j, readCard[j] ); // Write scanned PICC's UID to EEPROM, start from address 3 | |
| } | |
| EEPROM.write(1, 143); // Write to EEPROM we defined Master Card. | |
| Serial.println(F("Master Card Defined")); | |
| } | |
| Serial.println(F("-------------------")); | |
| Serial.println(F("Master Card's UID")); | |
| for ( uint8_t i = 0; i < 4; i++ ) { // Read Master Card's UID from EEPROM | |
| masterCard[i] = EEPROM.read(2 + i); // Write it to masterCard | |
| Serial.print(masterCard[i], HEX); | |
| } | |
| Serial.println(""); | |
| Serial.println(F("-------------------")); | |
| Serial.println(F("Everything Ready")); | |
| Serial.println(F("Waiting PICCs to be scanned")); | |
| cycleLeds(); // Everything ready lets give user some feedback by cycling leds | |
| } | |
| ///////////////////////////////////////// Main Loop /////////////////////////////////// | |
| void loop () { | |
| do { | |
| successRead = getID(); // sets successRead to 1 when we get read from reader otherwise 0 | |
| // When device is in use if wipe button pressed for 10 seconds initialize Master Card wiping | |
| if (digitalRead(wipeB) == LOW) { // Check if button is pressed | |
| // Visualize normal operation is iterrupted by pressing wipe button Red is like more Warning to user | |
| digitalWrite(redLed, LED_ON); // Make sure led is off | |
| digitalWrite(greenLed, LED_OFF); // Make sure led is off | |
| digitalWrite(blueLed, LED_OFF); // Make sure led is off | |
| // Give some feedback | |
| Serial.println(F("Wipe Button Pressed")); | |
| Serial.println(F("Master Card will be Erased! in 10 seconds")); | |
| delay(10000); // Wait 10 seconds to see user still wants to wipe | |
| if (digitalRead(wipeB) == LOW) { | |
| EEPROM.write(1, 0); // Reset Magic Number. | |
| Serial.println(F("Restart device to re-program Master Card")); | |
| while (1); | |
| } | |
| } | |
| if (programMode) { | |
| cycleLeds(); // Program Mode cycles through Red Green Blue waiting to read a new card | |
| } | |
| else { | |
| normalModeOn(); // Normal mode, blue Power LED is on, all others are off | |
| } | |
| } | |
| while (!successRead); //the program will not go further while you are not getting a successful read | |
| if (programMode) { | |
| if ( isMaster(readCard) ) { //When in program mode check First If master card scanned again to exit program mode | |
| Serial.println(F("Master Card Scanned")); | |
| Serial.println(F("Exiting Program Mode")); | |
| Serial.println(F("-----------------------------")); | |
| programMode = false; | |
| return; | |
| } | |
| else { | |
| if ( findID(readCard) ) { // If scanned card is known delete it | |
| Serial.println(F("I know this PICC, removing...")); | |
| deleteID(readCard); | |
| Serial.println("-----------------------------"); | |
| Serial.println(F("Scan a PICC to ADD or REMOVE to EEPROM")); | |
| } | |
| else { // If scanned card is not known add it | |
| Serial.println(F("I do not know this PICC, adding...")); | |
| writeID(readCard); | |
| Serial.println(F("-----------------------------")); | |
| Serial.println(F("Scan a PICC to ADD or REMOVE to EEPROM")); | |
| } | |
| } | |
| } | |
| else { | |
| if ( isMaster(readCard)) { // If scanned card's ID matches Master Card's ID - enter program mode | |
| programMode = true; | |
| Serial.println(F("Hello Master - Entered Program Mode")); | |
| uint8_t count = EEPROM.read(0); // Read the first Byte of EEPROM that | |
| Serial.print(F("I have ")); // stores the number of ID's in EEPROM | |
| Serial.print(count); | |
| Serial.print(F(" record(s) on EEPROM")); | |
| Serial.println(""); | |
| Serial.println(F("Scan a PICC to ADD or REMOVE to EEPROM")); | |
| Serial.println(F("Scan Master Card again to Exit Program Mode")); | |
| Serial.println(F("-----------------------------")); | |
| } | |
| else { | |
| if ( findID(readCard) ) { // If not, see if the card is in the EEPROM | |
| Serial.println(F("Welcome, You shall pass")); | |
| granted(lockDelay); // Open the door lock for lockDelay duration | |
| } | |
| else { // If not, show that the ID was not valid | |
| Serial.println(F("You shall not pass")); | |
| denied(); | |
| } | |
| } | |
| } | |
| } | |
| ///////////////////////////////////////// Access Granted /////////////////////////////////// | |
| void granted ( uint16_t setDelay) { | |
| digitalWrite(blueLed, LED_OFF); // Turn off blue LED | |
| digitalWrite(redLed, LED_OFF); // Turn off red LED | |
| digitalWrite(greenLed, LED_ON); // Turn on green LED | |
| digitalWrite(relay, LOW); // Unlock door! | |
| delay(setDelay); // Hold door lock open for given seconds | |
| digitalWrite(relay, HIGH); // Relock door | |
| delay(1000); // Hold green LED on for a second | |
| } | |
| ///////////////////////////////////////// Access Denied /////////////////////////////////// | |
| void denied() { | |
| digitalWrite(greenLed, LED_OFF); // Make sure green LED is off | |
| digitalWrite(blueLed, LED_OFF); // Make sure blue LED is off | |
| digitalWrite(redLed, LED_ON); // Turn on red LED | |
| delay(1000); | |
| } | |
| ///////////////////////////////////////// Get PICC's UID /////////////////////////////////// | |
| uint8_t getID() { | |
| // Getting ready for Reading PICCs | |
| if ( ! mfrc522.PICC_IsNewCardPresent()) { //If a new PICC placed to RFID reader continue | |
| return 0; | |
| } | |
| if ( ! mfrc522.PICC_ReadCardSerial()) { //Since a PICC placed get Serial and continue | |
| return 0; | |
| } | |
| // There are Mifare PICCs which have 4 byte or 7 byte UID care if you use 7 byte PICC | |
| // I think we should assume every PICC as they have 4 byte UID | |
| // Until we support 7 byte PICCs | |
| Serial.println(F("Scanned PICC's UID:")); | |
| for ( uint8_t i = 0; i < 4; i++) { // | |
| readCard[i] = mfrc522.uid.uidByte[i]; | |
| Serial.print(readCard[i], HEX); | |
| } | |
| Serial.println(""); | |
| mfrc522.PICC_HaltA(); // Stop reading | |
| return 1; | |
| } | |
| void ShowReaderDetails() { | |
| // Get the MFRC522 software version | |
| byte v = mfrc522.PCD_ReadRegister(mfrc522.VersionReg); | |
| Serial.print(F("MFRC522 Software Version: 0x")); | |
| Serial.print(v, HEX); | |
| if (v == 0x91) | |
| Serial.print(F(" = v1.0")); | |
| else if (v == 0x92) | |
| Serial.print(F(" = v2.0")); | |
| else | |
| Serial.print(F(" (unknown),probably a chinese clone?")); | |
| Serial.println(""); | |
| // When 0x00 or 0xFF is returned, communication probably failed | |
| if ((v == 0x00) || (v == 0xFF)) { | |
| Serial.println(F("WARNING: Communication failure, is the MFRC522 properly connected?")); | |
| Serial.println(F("SYSTEM HALTED: Check connections.")); | |
| // Visualize system is halted | |
| digitalWrite(greenLed, LED_OFF); // Make sure green LED is off | |
| digitalWrite(blueLed, LED_OFF); // Make sure blue LED is off | |
| digitalWrite(redLed, LED_ON); // Turn on red LED | |
| while (true); // do not go further | |
| } | |
| } | |
| ///////////////////////////////////////// Cycle Leds (Program Mode) /////////////////////////////////// | |
| void cycleLeds() { | |
| digitalWrite(redLed, LED_OFF); // Make sure red LED is off | |
| digitalWrite(greenLed, LED_ON); // Make sure green LED is on | |
| digitalWrite(blueLed, LED_OFF); // Make sure blue LED is off | |
| delay(200); | |
| digitalWrite(redLed, LED_OFF); // Make sure red LED is off | |
| digitalWrite(greenLed, LED_OFF); // Make sure green LED is off | |
| digitalWrite(blueLed, LED_ON); // Make sure blue LED is on | |
| delay(200); | |
| digitalWrite(redLed, LED_ON); // Make sure red LED is on | |
| digitalWrite(greenLed, LED_OFF); // Make sure green LED is off | |
| digitalWrite(blueLed, LED_OFF); // Make sure blue LED is off | |
| delay(200); | |
| } | |
| //////////////////////////////////////// Normal Mode Led /////////////////////////////////// | |
| void normalModeOn () { | |
| digitalWrite(blueLed, LED_ON); // Blue LED ON and ready to read card | |
| digitalWrite(redLed, LED_OFF); // Make sure Red LED is off | |
| digitalWrite(greenLed, LED_OFF); // Make sure Green LED is off | |
| digitalWrite(relay, HIGH); // Make sure Door is Locked | |
| } | |
| //////////////////////////////////////// Read an ID from EEPROM ////////////////////////////// | |
| void readID( uint8_t number ) { | |
| uint8_t start = (number * 4 ) + 2; // Figure out starting position | |
| for ( uint8_t i = 0; i < 4; i++ ) { // Loop 4 times to get the 4 Bytes | |
| storedCard[i] = EEPROM.read(start + i); // Assign values read from EEPROM to array | |
| } | |
| } | |
| ///////////////////////////////////////// Add ID to EEPROM /////////////////////////////////// | |
| void writeID( byte a[] ) { | |
| if ( !findID( a ) ) { // Before we write to the EEPROM, check to see if we have seen this card before! | |
| uint8_t num = EEPROM.read(0); // Get the numer of used spaces, position 0 stores the number of ID cards | |
| uint8_t start = ( num * 4 ) + 6; // Figure out where the next slot starts | |
| num++; // Increment the counter by one | |
| EEPROM.write( 0, num ); // Write the new count to the counter | |
| for ( uint8_t j = 0; j < 4; j++ ) { // Loop 4 times | |
| EEPROM.write( start + j, a[j] ); // Write the array values to EEPROM in the right position | |
| } | |
| successWrite(); | |
| Serial.println(F("Succesfully added ID record to EEPROM")); | |
| } | |
| else { | |
| failedWrite(); | |
| Serial.println(F("Failed! There is something wrong with ID or bad EEPROM")); | |
| } | |
| } | |
| ///////////////////////////////////////// Remove ID from EEPROM /////////////////////////////////// | |
| void deleteID( byte a[] ) { | |
| if ( !findID( a ) ) { // Before we delete from the EEPROM, check to see if we have this card! | |
| failedWrite(); // If not | |
| Serial.println(F("Failed! There is something wrong with ID or bad EEPROM")); | |
| } | |
| else { | |
| uint8_t num = EEPROM.read(0); // Get the numer of used spaces, position 0 stores the number of ID cards | |
| uint8_t slot; // Figure out the slot number of the card | |
| uint8_t start; // = ( num * 4 ) + 6; // Figure out where the next slot starts | |
| uint8_t looping; // The number of times the loop repeats | |
| uint8_t j; | |
| uint8_t count = EEPROM.read(0); // Read the first Byte of EEPROM that stores number of cards | |
| slot = findIDSLOT( a ); // Figure out the slot number of the card to delete | |
| start = (slot * 4) + 2; | |
| looping = ((num - slot) * 4); | |
| num--; // Decrement the counter by one | |
| EEPROM.write( 0, num ); // Write the new count to the counter | |
| for ( j = 0; j < looping; j++ ) { // Loop the card shift times | |
| EEPROM.write( start + j, EEPROM.read(start + 4 + j)); // Shift the array values to 4 places earlier in the EEPROM | |
| } | |
| for ( uint8_t k = 0; k < 4; k++ ) { // Shifting loop | |
| EEPROM.write( start + j + k, 0); | |
| } | |
| successDelete(); | |
| Serial.println(F("Succesfully removed ID record from EEPROM")); | |
| } | |
| } | |
| ///////////////////////////////////////// Check Bytes /////////////////////////////////// | |
| boolean checkTwo ( byte a[], byte b[] ) { | |
| if ( a[0] != 0 ) // Make sure there is something in the array first | |
| match = true; // Assume they match at first | |
| for ( uint8_t k = 0; k < 4; k++ ) { // Loop 4 times | |
| if ( a[k] != b[k] ) // IF a != b then set match = false, one fails, all fail | |
| match = false; | |
| } | |
| if ( match ) { // Check to see if if match is still true | |
| return true; // Return true | |
| } | |
| else { | |
| return false; // Return false | |
| } | |
| } | |
| ///////////////////////////////////////// Find Slot /////////////////////////////////// | |
| uint8_t findIDSLOT( byte find[] ) { | |
| uint8_t count = EEPROM.read(0); // Read the first Byte of EEPROM that | |
| for ( uint8_t i = 1; i <= count; i++ ) { // Loop once for each EEPROM entry | |
| readID(i); // Read an ID from EEPROM, it is stored in storedCard[4] | |
| if ( checkTwo( find, storedCard ) ) { // Check to see if the storedCard read from EEPROM | |
| // is the same as the find[] ID card passed | |
| return i; // The slot number of the card | |
| break; // Stop looking we found it | |
| } | |
| } | |
| } | |
| ///////////////////////////////////////// Find ID From EEPROM /////////////////////////////////// | |
| boolean findID( byte find[] ) { | |
| uint8_t count = EEPROM.read(0); // Read the first Byte of EEPROM that | |
| for ( uint8_t i = 1; i <= count; i++ ) { // Loop once for each EEPROM entry | |
| readID(i); // Read an ID from EEPROM, it is stored in storedCard[4] | |
| if ( checkTwo( find, storedCard ) ) { // Check to see if the storedCard read from EEPROM | |
| return true; | |
| break; // Stop looking we found it | |
| } | |
| else { // If not, return false | |
| } | |
| } | |
| return false; | |
| } | |
| ///////////////////////////////////////// Write Success to EEPROM /////////////////////////////////// | |
| // Flashes the green LED 3 times to indicate a successful write to EEPROM | |
| void successWrite() { | |
| digitalWrite(blueLed, LED_OFF); // Make sure blue LED is off | |
| digitalWrite(redLed, LED_OFF); // Make sure red LED is off | |
| digitalWrite(greenLed, LED_OFF); // Make sure green LED is on | |
| delay(200); | |
| digitalWrite(greenLed, LED_ON); // Make sure green LED is on | |
| delay(200); | |
| digitalWrite(greenLed, LED_OFF); // Make sure green LED is off | |
| delay(200); | |
| digitalWrite(greenLed, LED_ON); // Make sure green LED is on | |
| delay(200); | |
| digitalWrite(greenLed, LED_OFF); // Make sure green LED is off | |
| delay(200); | |
| digitalWrite(greenLed, LED_ON); // Make sure green LED is on | |
| delay(200); | |
| } | |
| ///////////////////////////////////////// Write Failed to EEPROM /////////////////////////////////// | |
| // Flashes the red LED 3 times to indicate a failed write to EEPROM | |
| void failedWrite() { | |
| digitalWrite(blueLed, LED_OFF); // Make sure blue LED is off | |
| digitalWrite(redLed, LED_OFF); // Make sure red LED is off | |
| digitalWrite(greenLed, LED_OFF); // Make sure green LED is off | |
| delay(200); | |
| digitalWrite(redLed, LED_ON); // Make sure red LED is on | |
| delay(200); | |
| digitalWrite(redLed, LED_OFF); // Make sure red LED is off | |
| delay(200); | |
| digitalWrite(redLed, LED_ON); // Make sure red LED is on | |
| delay(200); | |
| digitalWrite(redLed, LED_OFF); // Make sure red LED is off | |
| delay(200); | |
| digitalWrite(redLed, LED_ON); // Make sure red LED is on | |
| delay(200); | |
| } | |
| ///////////////////////////////////////// Success Remove UID From EEPROM /////////////////////////////////// | |
| // Flashes the blue LED 3 times to indicate a success delete to EEPROM | |
| void successDelete() { | |
| digitalWrite(blueLed, LED_OFF); // Make sure blue LED is off | |
| digitalWrite(redLed, LED_OFF); // Make sure red LED is off | |
| digitalWrite(greenLed, LED_OFF); // Make sure green LED is off | |
| delay(200); | |
| digitalWrite(blueLed, LED_ON); // Make sure blue LED is on | |
| delay(200); | |
| digitalWrite(blueLed, LED_OFF); // Make sure blue LED is off | |
| delay(200); | |
| digitalWrite(blueLed, LED_ON); // Make sure blue LED is on | |
| delay(200); | |
| digitalWrite(blueLed, LED_OFF); // Make sure blue LED is off | |
| delay(200); | |
| digitalWrite(blueLed, LED_ON); // Make sure blue LED is on | |
| delay(200); | |
| } | |
| ////////////////////// Check readCard IF is masterCard /////////////////////////////////// | |
| // Check to see if the ID passed is the master programing card | |
| boolean isMaster( byte test[] ) { | |
| if ( checkTwo( test, masterCard ) ) | |
| return true; | |
| else | |
| return false; | |
| } |
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Hello, I have a problem, Arduino is showing me this error :" error compiling for board Arduino/Genuino uno