diff --git a/examples/AccessControl/AccessControl.ino b/examples/AccessControl/AccessControl.ino index 63db1c2..0e7bd72 100644 --- a/examples/AccessControl/AccessControl.ino +++ b/examples/AccessControl/AccessControl.ino @@ -62,19 +62,19 @@ #include // We are going to read and write PICC's UIDs from/to EEPROM #include // RC522 Module uses SPI protocol -#include // Library for Mifare RC522 Devices +#include // 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 + 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 /* - 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, + 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 @@ -87,27 +87,27 @@ #define LED_OFF LOW #endif -#define redLed 7 // Set Led Pins +#define redLed 7 // Set Led Pins #define greenLed 6 #define blueLed 5 -#define relay 4 // Set Relay Pin -#define wipeB 3 // Button pin for WipeMode +#define relay 4 // Set Relay Pin +#define wipeB 3 // Button pin for WipeMode boolean match = false; // initialize card match to false -boolean programMode = false; // initialize programming mode to false +boolean programMode = false; // initialize programming mode to false boolean replaceMaster = false; -int successRead; // Variable integer to keep if we have Successful Read from Reader +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 +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); +MFRC522 mfrc522(SS_PIN, RST_PIN); ///////////////////////////////////////// Setup /////////////////////////////////// void setup() { @@ -115,16 +115,16 @@ void setup() { pinMode(redLed, OUTPUT); pinMode(greenLed, OUTPUT); pinMode(blueLed, OUTPUT); - pinMode(wipeB, INPUT_PULLUP); // Enable pin's pull up resistor + 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, HIGH); // Make sure door is locked - 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 + digitalWrite(relay, HIGH); // Make sure door is locked + 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 + Serial.begin(9600); // Initialize serial communications with PC SPI.begin(); // MFRC522 Hardware uses SPI protocol mfrc522.PCD_Init(); // Initialize MFRC522 Hardware @@ -132,27 +132,27 @@ void setup() { //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 + 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 + 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 (int x = 0; x < EEPROM.length(); x = x + 1) { //Loop end of EEPROM address + 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 + 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 + digitalWrite(redLed, LED_OFF); // visualize a successful wipe delay(200); digitalWrite(redLed, LED_ON); delay(200); @@ -182,7 +182,7 @@ void setup() { delay(200); } while (!successRead); // Program will not go further while you not get a successful read - for ( int j = 0; j < 4; j++ ) { // Loop 4 times + 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. @@ -190,7 +190,7 @@ void setup() { } Serial.println(F("-------------------")); Serial.println(F("Master Card's UID")); - for ( int i = 0; i < 4; i++ ) { // Read Master Card's UID from EEPROM + 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); } @@ -205,7 +205,7 @@ void setup() { ///////////////////////////////////////// Main Loop /////////////////////////////////// void loop () { do { - successRead = getID(); // sets successRead to 1 when we get read from reader otherwise 0 + 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 @@ -226,10 +226,10 @@ void loop () { 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 + 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 + 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")); @@ -254,11 +254,11 @@ void loop () { } } else { - if ( isMaster(readCard)) { // If scanned card's ID matches Master Card's ID - enter program mode + 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")); - int count = EEPROM.read(0); // Read the first Byte of EEPROM that - Serial.print(F("I have ")); // stores the number of ID's in EEPROM + 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(""); @@ -267,11 +267,11 @@ void loop () { Serial.println(F("-----------------------------")); } else { - if ( findID(readCard) ) { // If not, see if the card is in the EEPROM + if ( findID(readCard) ) { // If not, see if the card is in the EEPROM Serial.println(F("Welcome, You shall pass")); - granted(300); // Open the door lock for 300 ms + granted(300); // Open the door lock for 300 ms } - else { // If not, show that the ID was not valid + else { // If not, show that the ID was not valid Serial.println(F("You shall not pass")); denied(); } @@ -280,27 +280,27 @@ void loop () { } ///////////////////////////////////////// Access Granted /////////////////////////////////// -void granted (int 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 +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 + 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 /////////////////////////////////// -int getID() { +uint8_t getID() { // Getting ready for Reading PICCs if ( ! mfrc522.PICC_IsNewCardPresent()) { //If a new PICC placed to RFID reader continue return 0; @@ -312,7 +312,7 @@ int getID() { // 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 (int i = 0; i < 4; i++) { // + for ( uint8_t i = 0; i < 4; i++) { // readCard[i] = mfrc522.uid.uidByte[i]; Serial.print(readCard[i], HEX); } @@ -338,54 +338,54 @@ void ShowReaderDetails() { 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 + 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 + 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 + 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 + 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 + 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( int number ) { - int start = (number * 4 ) + 2; // Figure out starting position - for ( int 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 +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! - int num = EEPROM.read(0); // Get the numer of used spaces, position 0 stores the number of ID cards - int 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 ( int j = 0; j < 4; j++ ) { // Loop 4 times - EEPROM.write( start + j, a[j] ); // Write the array values to EEPROM in the right position + 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")); @@ -398,26 +398,26 @@ void writeID( byte a[] ) { ///////////////////////////////////////// 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 + 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 { - int num = EEPROM.read(0); // Get the numer of used spaces, position 0 stores the number of ID cards - int slot; // Figure out the slot number of the card - int start; // = ( num * 4 ) + 6; // Figure out where the next slot starts - int looping; // The number of times the loop repeats - int j; - int 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 + 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 + 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 ( int k = 0; k < 4; k++ ) { // Shifting loop + for ( uint8_t k = 0; k < 4; k++ ) { // Shifting loop EEPROM.write( start + j + k, 0); } successDelete(); @@ -427,43 +427,43 @@ void deleteID( byte a[] ) { ///////////////////////////////////////// Check Bytes /////////////////////////////////// boolean checkTwo ( byte a[], byte b[] ) { - if ( a[0] != NULL ) // Make sure there is something in the array first - match = true; // Assume they match at first - for ( int k = 0; k < 4; k++ ) { // Loop 4 times - if ( a[k] != b[k] ) // IF a != b then set match = false, one fails, all fail + 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 + if ( match ) { // Check to see if if match is still true + return true; // Return true } else { - return false; // Return false + return false; // Return false } } ///////////////////////////////////////// Find Slot /////////////////////////////////// -int findIDSLOT( byte find[] ) { - int count = EEPROM.read(0); // Read the first Byte of EEPROM that - for ( int 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 +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 + return i; // The slot number of the card + break; // Stop looking we found it } } } ///////////////////////////////////////// Find ID From EEPROM /////////////////////////////////// boolean findID( byte find[] ) { - int count = EEPROM.read(0); // Read the first Byte of EEPROM that - for ( int 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 + 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 + break; // Stop looking we found it } - else { // If not, return false + else { // If not, return false } } return false; @@ -472,57 +472,57 @@ boolean findID( byte find[] ) { ///////////////////////////////////////// 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 + 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 + digitalWrite(greenLed, LED_ON); // Make sure green LED is on delay(200); - digitalWrite(greenLed, LED_OFF); // Make sure green LED is off + digitalWrite(greenLed, LED_OFF); // Make sure green LED is off delay(200); - digitalWrite(greenLed, LED_ON); // Make sure green LED is on + digitalWrite(greenLed, LED_ON); // Make sure green LED is on delay(200); - digitalWrite(greenLed, LED_OFF); // Make sure green LED is off + digitalWrite(greenLed, LED_OFF); // Make sure green LED is off delay(200); - digitalWrite(greenLed, LED_ON); // Make sure green LED is on + 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 + 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 + digitalWrite(redLed, LED_ON); // Make sure red LED is on delay(200); - digitalWrite(redLed, LED_OFF); // Make sure red LED is off + digitalWrite(redLed, LED_OFF); // Make sure red LED is off delay(200); - digitalWrite(redLed, LED_ON); // Make sure red LED is on + digitalWrite(redLed, LED_ON); // Make sure red LED is on delay(200); - digitalWrite(redLed, LED_OFF); // Make sure red LED is off + digitalWrite(redLed, LED_OFF); // Make sure red LED is off delay(200); - digitalWrite(redLed, LED_ON); // Make sure red LED is on + 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 + 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 + digitalWrite(blueLed, LED_ON); // Make sure blue LED is on delay(200); - digitalWrite(blueLed, LED_OFF); // Make sure blue LED is off + digitalWrite(blueLed, LED_OFF); // Make sure blue LED is off delay(200); - digitalWrite(blueLed, LED_ON); // Make sure blue LED is on + digitalWrite(blueLed, LED_ON); // Make sure blue LED is on delay(200); - digitalWrite(blueLed, LED_OFF); // Make sure blue LED is off + digitalWrite(blueLed, LED_OFF); // Make sure blue LED is off delay(200); - digitalWrite(blueLed, LED_ON); // Make sure blue LED is on + digitalWrite(blueLed, LED_ON); // Make sure blue LED is on delay(200); }