The Arduino Safe

<a href="https://www.youtube.com/watch?v=BYBiCHGGIzQ">https://www.youtube.com/watch?v=BYBiCHGGIzQ</a> A friend and I teamed up at school for a capstone project. We built a safe powered by an Arduino. The safe can be unlocked by either putting in a pin code or scanning an RFID tag. 3 wrong attempts will cause a timeout and not allow anything to happen. A correct password or RFID tag will open the door. There are alarms that will sound if the safe is picked up. The alarm can be deactivated by flipping a switch on the inside of the box. Here is the info: Components: 1 Arduino Mega 2560 1 RFID Module -RC522 1 Ultrasonic Sensor 1 Servo Motor 1 Active Buzzer 1 Membrance Switch Module (4x4 keypad) 1 RGB 10mm LED 1 Resistor (330Ω) 3 Relays, TE (OMR-C-105H) 2 Buzzers, Radio Shack 7-14VDC 108dB 1 9V battery with power supply adapter battery holder 2 23A 12V Batteries with battery holder 1 Electrolytic Capacitor (100uF 50V) 3 170 tie-Points Mini Breadboard 1 Mega 2560 case 1 main power switch Jump wires 22 AWG stranded 22 AWG solid The Code: #include <Servo.h> // servo motor library (0-180 degrees) #include <MFRC522.h> // Include of the RC522 Library #include <SPI.h> // Used for communication via SPI with the Module (RC522) #include <Keypad.h> // 4x4 keypad library #include <Password.h> // password library (holds password) int ledGreen = 6; // Green LED int ledRed = 4; // Red LED int ledBlue = 7; // Blue LED int val = 0; // variable to store the read value int count = 0; // counter int relayLED = 11; // 12 LED panel inside the safe int alarmRelay1 = 8; // 108dB buzzer for ultrasonic sensor int alarmSwitch = 10; // switch to turn off alarm int alarmState; // detects change of state on the alarm switch int alarmRelay2 = 26; // 108dB buzzer for ultrasonic sensor int trigPin = 22; // trigger pin on the ultrasonic sensor int echoPin = 24; // echo pin on the ultrasonic sensor int setDistance = 6; // 6cm set max distance long duration; // return ping detection variable, duration of ping int distance;// variable storing distance #define SDAPIN 53 // RFID Module SDA Pin is connected to the MEGA 53 Pin #define RESETPIN 5 // RFID Module RST Pin is connected to the MEGA 5 Pin #define Buzzer 3 // Pin 3 connected to + pin of the Buzzer byte FoundTag; // Variable used to check if Tag was found byte ReadTag; // Variable used to store anti-collision value to read Tag information byte TagData[MAX_LEN]; // Variable used to store Full Tag Data byte TagSerialNumber[4]; // Variable used to store only Tag Serial Number byte GoodTagSerialNumber[4] = {0x13, 0xB8, 0xC0, 0x1}; // The Tag Serial number we are looking for String newPasswordString;// hold new password char newPassword[6]; // up to 6 digits for password Password password = Password("2234"); // the correct password is 2234 byte maxPasswordLength = 6; // 6 digits max input for password byte currentPasswordLength = 0; // same as above const byte ROWS = 4; // 4 rows on keypad const byte COLS = 4; // 4 colums for keypad char keys[ROWS][COLS] = { {'1','2','3','A'}, {'4','5','6','B'}, {'7','8','9','C'}, {'*','0','#','D'}, }; // keypad map layout byte rowPins[ROWS] = {48,46,44,42}; // Pin out for rows on keypad byte colPins[COLS] = {49,47,45,43}; // Pin out for colums on keypad Keypad keypad = Keypad(makeKeymap(keys), rowPins, colPins, ROWS, COLS); // keymap inputs MFRC522 nfc(SDAPIN, RESETPIN); // Init of the library using the MEGA pins declared above Servo myServo; // Naming the servo motor void setup() { myServo.attach(A1); // Servo motor connected to pin A1 pinMode(Buzzer, OUTPUT); // Set buzzer pin to an output pin pinMode(ledGreen, OUTPUT); // Set green LED to an output pin pinMode(ledRed, OUTPUT); // Set red LED to an output pin pinMode(ledBlue, OUTPUT); // Set blue LED to an output pin pinMode(alarmRelay1, OUTPUT); // Set alarm relay1 buzzer to an output pinMode(alarmSwitch, INPUT); // Set alarm switch to an input pinMode(relayLED, OUTPUT); // Set relay LED panel to an output pinMode(alarmRelay2, OUTPUT); // Set alarm relay2 buzzer to an output pinMode(trigPin, OUTPUT); // Set trigger pin to an output pinMode(echoPin, INPUT); // Set echo pin to an input digitalWrite(relayLED, LOW); // Relay LED panel off at startup digitalWrite(alarmRelay1, LOW); // alarm relay1 buzzer off at startup digitalWrite(alarmRelay2, LOW); // alarm relay2 buzzer off at startup digitalWrite(Buzzer, LOW); // Buzzer Off at startup digitalWrite(ledGreen, LOW); // Green LED Off at startup digitalWrite(ledRed, LOW); // Red LED Off at startup digitalWrite(ledBlue, LOW); // Blue LED Off at startup SPI.begin(); // communication begins for the RFID Serial.begin(115200); // communication will print on serial monitor 115200 // Start to find an RFID Module Serial.println("Looking for RFID Reader"); // searching for RFID reader, printed on serial monitor 115200 nfc.begin(); // start near field communication with RFID byte version = nfc.getFirmwareVersion(); // Variable to store Firmware version of the Module // If can't find an RFID Module if (! version) { Serial.print("Didn't find RC522 board."); // the RFID module could not be found, printed on serial monitor 115200 while(1); //Wait until a RFID Module is found } // If found, print the information about the RFID Module Serial.print("Found chip RC522 "); //RFID found, printed on serial monitor 115200 Serial.print("Firmware version: 0x"); // print RFID reader software version for RC522 Serial.println(version, HEX); // print on binary hex decimal Serial.println(); // print RFID card or fob on serial monitor 115200 } void loop() { char key = keypad.getKey(); // password to be entered on keypad if(key!=NO_KEY){ delay(60); // if no key is intered delay .06 seconds switch(key){ case'#':checkPassword(); break; // # button on the keypad will check password case'*':lockSafe(); break; // * button on keypad will lock the safe default: processNumberKey(key); // process password for correct password } } digitalWrite(trigPin, LOW); // trigger pin on low state delayMicroseconds(2);// delay 2 micro second digitalWrite(trigPin, HIGH); // trigger pin turns high delayMicroseconds(10);// delay 10 micro seconds digitalWrite(trigPin, LOW); // trigger pin turns low duration = pulseIn(echoPin, HIGH);// waits for the pin to go HIGH, starts timing, then waits for the pin to go LOW and stops timing. distance = duration*0.034/2; // duration x .034cm/Micro Second / 2 String GoodTag="False"; // Variable used to confirm good Tag Detected // Check to see if a Tag was detected // If yes, then the variable FoundTag will contain "MI_OK" FoundTag = nfc.requestTag(MF1_REQIDL, TagData); if (FoundTag == MI_OK) { delay(200); // delay .2 second // Get anti-collision value to properly read information from the Tag ReadTag = nfc.antiCollision(TagData); memcpy(TagSerialNumber, TagData, 4); // Write the Tag information in the TagSerialNumber variable Serial.println("Tag detected."); // tag detected printed on serial monitor Serial.print("Serial Number: "); // print serial number: on serial monitor for (int i = 0; i < 4; i++) { // Loop to print serial number to serial monitor Serial.print(TagSerialNumber[i], HEX); // print tag number in hex decimal Serial.print(", "); // print tage numbers after Serial number: } Serial.println(""); // print on next line Serial.println(); // space printed // Check if detected Tag has the right Serial number we are looking for for(int i=0; i < 4; i++){ if (GoodTagSerialNumber[i] != TagSerialNumber[i]) { break; // if not equal, then break out of the "for" loop } if (i == 3) { // if we made it to 4 loops then the Tag Serial numbers are matching GoodTag="TRUE"; // tag maches code } } if (GoodTag == "TRUE"){ Serial.println("ACCESS GRANTED!"); // access grented printed on serial monitor Serial.println(); // space printed myServo.write(180); // servo motor moves from 0 to 180 degrees (safe unlocks) digitalWrite(relayLED, HIGH); // LED panel turns on for (int y = 0; y < 3; y++){ digitalWrite (Buzzer, HIGH) ;// Buzzer On delay (50) ;// Delay .05 seconds digitalWrite (ledGreen, HIGH); // green LED turns on delay (50); // delay .05 seconds digitalWrite (Buzzer, LOW) ;// Buzzer Off delay (50) ;// delay .05 seconds digitalWrite (ledGreen, LOW); // green LED turns off delay (50); // delay .05 seconds count = 0; // counter reset to zero } delay(1500); // delay 1 1/2 seconds } else { Serial.println("ACCESS DENIED!"); // access denied printed on serial monitor Serial.println(); // space printed for (int y = 0; y < 3; y++){ digitalWrite (Buzzer, HIGH) ;// Buzzer On delay (300) ;// Delay .3 seconds digitalWrite (ledRed, HIGH); // red LED turns on delay (300); // delay .3 seconds digitalWrite (Buzzer, LOW) ;// Buzzer Off delay (400) ;// delay .4 second digitalWrite (ledRed, LOW); // red LED turns off delay (400); // delay .4 seconds count ++; // counter incresses } delay(500); // delay 1/2 seconds } } // when counter reaches 9 the safe times out for 15 seconds if (count >= 9){ count = 0; // counter reset when couter reaches 9 or over 9 digitalWrite(ledBlue, HIGH); // blue LED turns on delay(15000); // delay 15 seconds digitalWrite(ledBlue,LOW); // blue LED turns off } alarmState = digitalRead(alarmSwitch); // the alarm switch will determind the alarm state if(alarmState == HIGH){ digitalWrite(alarmRelay1, LOW); // if alarm switch is high, then the alarm relay1 turns off (disables the alarm) digitalWrite(alarmRelay2, LOW);} // if alarm switch is high, then the alarm relay2 turns off (disables the alarm) else{ if(distance>setDistance){ digitalWrite(alarmRelay1, HIGH); // if the the distance measured of the ultra sonic sensor is greater then the set distance, then alarm realy1 goes high (alarm turns on) digitalWrite(alarmRelay2, HIGH); // if the the distance measured of the ultra sonic sensor is greater then the set distance, then alarm realy2 goes high (alarm turns on) } else{ digitalWrite(alarmRelay1, LOW); // if the the distance measured is less then the set distance then the alarm relay1 goes low (alarm turns off) digitalWrite(alarmRelay2, LOW); // if the the distance measured is less then the set distance then the alarm relay2 goes low (alarm turns off) } } } void processNumberKey(char key){ Serial.print(key); // serial print the keys being pressed on the keypad currentPasswordLength++; // keep adding inputed keys to the current password password.append(key); // add password key if(currentPasswordLength==maxPasswordLength){ checkPassword(); // if the max length of the password allowed is met, then check password } } void checkPassword(){ if(password.evaluate()){ Serial.println("ACCESS GRANTED!"); // if password is a mach then access granted is printed on the serial print myServo.write(180); // servo motor turns to 180 degrees ( opens) digitalWrite(relayLED, HIGH); // LED light panel turns on for (int y = 0; y < 3; y++){ digitalWrite (Buzzer, HIGH) ;// Buzzer On delay (50) ;// Delay .05 seconds digitalWrite (ledGreen, HIGH); // green LED turns on delay (50); // delays .05 second digitalWrite (Buzzer, LOW) ;// Buzzer Off delay (50) ;// delay .05 seconds digitalWrite (ledGreen, LOW); // green LED turns off delay (50); // delays .05 seconds count = 0; // counter goes back to zero } delay(1500); // delays 1.5 seconds } else { Serial.println(" ACCESS DENIED!"); // access denied printed on serial print Serial.println(); // space printed for (int y = 0; y < 3; y++){ digitalWrite (Buzzer, HIGH) ;// Buzzer On delay (300) ;// Delay .3 seconds digitalWrite (ledRed, HIGH); // red LED turns on delay (300); // delays .3 seconds digitalWrite (Buzzer, LOW) ;// Buzzer Off delay (400) ;// delay .4 seconds digitalWrite (ledRed, LOW); // red LED turns off delay (400); // delays .4 seconds count ++; // counter starts countin up } delay(500); // delays .5 seconds } resetPassword(); // conduct resetPassword proccess } void resetPassword(){ password.reset(); // password for keypad reset currentPasswordLength=0; // password goes to zero inputs } void lockSafe(){ Serial.println("SAFE LOCKED!"); // safe locked printed on serial monitor Serial.println(); // space printed myServo.write(90); // servo motor moves back to 90 degrees digitalWrite(relayLED, LOW); // LED panel turns off } <img src="https://steemitimages.com/DQmV3BZNvWSuHJqCtoGX75bVvbixP9bMNziw1ghDyLyYyUq/wiring%20diagram.PNG" alt="wiring diagram.PNG">