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--- pm:prj2023:vstoica:sistem-alarma-cosor-mihai [2023/05/29 20:05]
mihai.cosor [Download]
+++ pm:prj2023:vstoica:sistem-alarma-cosor-mihai [2023/05/29 20:49] (current)
mihai.cosor [Software Design]
@@ Line 57: / Line 57: @@
 </note>
+Biblioteci utilizate
 <code C>
-	// todo
+    #include <Keypad.h>
+    #include <Wire.h>
+    #include <LiquidCrystal_I2C.h>
+    #include <SPI.h>
+    #include <MFRC522.h>
 </code>
+Setup module / senzori / butoane:
+<code C>
+    void setup() {
+      // LCD setup
+      lcd.init();
+      lcd.backlight();
+      lcd.clear();
+      lcd.setCursor(1, 0);
+      lcd.print("Welcome home!");
+      // RFID setup
+      SPI.begin();
+      mfrc522.PCD_Init();
+      // Ultrasonic setup
+      pinMode(trigPin, OUTPUT);
+      pinMode(echoPin, INPUT);
+      // Buton de panica setup
+      pinMode(INTERRUPT_PIN, INPUT_PULLUP);
+      attachInterrupt(digitalPinToInterrupt(INTERRUPT_PIN), panic, CHANGE);
+      // Parole reset
+      initPasswords();
+    }
+</code>
+Functia de loop verifica alarma si accepta input de la tastatura pentru unul din 3 scenarii:
+<code C>
+    void loop() {
+      checkAlarm();
+      char key = keypad.getKey();
+      if (key){
+        switch (key) {
+          case ADD_PASSWORD:
+            add_password();
+            break;
+          case DELETE_PASSWORD:
+            delete_password();
+            break;
+          case SEND_PASSWORD:
+            send_password();
+            break;
+          default:
+            break;
+        }
+      }
+    }
+</code>
+Functia de verificare per total a alarmei:
+<code C>
+    bool checkAlarm() {
+      if (isPanic) { // verificare buton de panica
+        lcd.clear();
+        lcd.setCursor(3, 0);
+        lcd.print("EMERGENCY!");
+        startAlarm();
+        return true;
+      }
+      if (isAuthorized) { // verificare daca s-a introdus cartela/cod inainte
+        countdown(); // countdown pana se reporneste senzorul
+        isAuthorized = false;
+        return false;
+      }
+      if (getID()) { // verificare existenta cartela
+        if (tagID == MasterTag) {
+          countdown();
+          return false;
+        } else {
+          lcd.clear();
+          lcd.print("Not a valid card");
+        }
+      }
+      if (isObstacleInFront()) { // verificare obstacol in fata senzorului
+        lcd.clear();
+        lcd.print("INTRUDER ALERT!");
+        startAlarm();
+        return true;
+      }
+      return false;
+    }
+</code>
+Functiile de citire senzor ultrasonic si calculare distanta si  decidere daca exista obstacol in fata la 30 de cm sau nu.
+<code C>
+    int getDistance() {
+      digitalWrite(trigPin, LOW);
+      delayMicroseconds(2);
+      digitalWrite(trigPin, HIGH);
+      delayMicroseconds(10);
+      digitalWrite(trigPin, LOW);
+      duration = pulseIn(echoPin, HIGH);
+      distance = duration * 0.034 / 2; // formula distanta conform vitezei sunetului
+      return distance;
+    }
+    /*
+    * Verificare senzor ultrasonic
+    */
+    bool isObstacleInFront() {
+      int distance = getDistance();
+      if (distance < 30) {
+        return true;
+      }
+      return false;
+    }
+</code>
+Functia de verificare a existentei cartelei in apropierea modului RFID si de citire a acesteia.
+<code C>
+    bool getID()  {
+      // Getting ready for Reading PICCs
+      if (!mfrc522.PICC_IsNewCardPresent()) { //If a new PICC placed to RFID reader continue
+        return false;
+      }
+      if (!mfrc522.PICC_ReadCardSerial()) { //Since a PICC placed get Serial and continue
+        return false;
+      }
+      tagID = "";
+      for (uint8_t i = 0; i < 4; i++) { // The MIFARE PICCs that we use have 4 byte UID
+        //readCard[i] = mfrc522.uid.uidByte[i];
+        tagID.concat(String(mfrc522.uid.uidByte[i], HEX)); // Adds the 4 bytes in a single String variable
+      }
+      tagID.toUpperCase();
+      mfrc522.PICC_HaltA(); // Stop reading
+      return true;
+    }
+</code>
+Restul functiilor folosite, doar semnaturile deoarece cele de add / send / delete sunt asemanatoare in primirea si handle-uirea inputului de la tastatura.
+<code C>
+/*
+ * Constante si initializari necesare programului in sine
+ */
+enum state {ACCEPTED, DENIED, WAITING};
+const byte NUMBER_OF_PASSWORDS = 10;
+byte FREE_SPACE_PASSWORDS = 10;
+long passwords[NUMBER_OF_PASSWORDS];
+const long MASTER_KEY = 2001;
+bool isAuthorized = false;
+/*
+ * Initializare vector de parole
+ */
+void initPasswords() {...}
+/*
+ * Verificare parola
+ */
+state checkPassword(long password) {...}
+/*
+ * Verificare parola admin
+ */
+bool checkMasterKey() {...}
+/*
+ * Adaugare parola noua
+ */
+void add_password() {...}
+/*
+ * Stergere parola
+ */
+void delete_password() {...}
+/*
+ * Introducere parola pentru verificare
+ */
+void send_password() {...}
+/*
+ * Start alarma
+ */
+void startAlarm() {...}
+</code>
 ===== Rezultate Obţinute =====