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--- iothings:proiecte:2025sric:securitysystem [2025/05/29 00:52]
roxana.popa2703 [Hardware description]
+++ iothings:proiecte:2025sric:securitysystem [2025/05/29 01:06] (current)
roxana.popa2703
@@ Line 22: / Line 22: @@
 {{:iothings:proiecte:2025sric:hw.png|}}
+==== Software description ====
+The following libraries were used:
+----
+  #include  <WiFi.h>               // to connect ESP32 via WiFi
+  #include "time.h"                // for logs timestamps
+  #include <Firebase_ESP_Client.h> // to read/write data to Firebase
+The Wi-Fi setup and connection:
+      WiFi.mode(WIFI_STA);
+      WiFi.begin(WIFI_SSID, WIFI_PASSWORD);
+      uint8_t status = WiFi.waitForConnectResult();
+      if (status == WL_CONNECTED) {
+        Serial.println();
+        Serial.println("connected (WL_CONNECTED)");
+      }
+The NTP server sync:
+     configTime(gmtOffset_sec, daylightOffset_sec, ntpServer);
+     Serial.print("Waiting for NTP time sync...");
+     while (time(nullptr) < 100000) {
+       delay(500);
+       Serial.print(".");
+     }
+    Serial.println("\nTime synced!");
+Access logging:
+     FirebaseJson log;
+     log.set("password", password);
+     log.set("status", status);
+     time_t now;
+     time(&now);
+     String timestamp = String(now);
+     String path = "users/logs/" + timestamp;
+     if (Firebase.RTDB.setJSON(&data, path, &log)) {
+        Serial.println("Log sent at " + timestamp);
+     } else {
+     Serial.print("Failed to send log: ");
+     Serial.println(data.errorReason());
+     }
+The **setup** function:
+    Serial.begin(115200);
+    Serial.setTimeout(1000);
+    pinMode(RED_LED, OUTPUT);
+    pinMode(GREEN_LED, OUTPUT);
+    pinMode(BUZZER, OUTPUT);
+    connectToWiFi();
+    initTime();
+    // Configure Firebase
+    config.api_key = API_KEY;
+    config.database_url = DATABASE_URL;
+    // Sign in anonymously (or use email/password)
+    auth.user.email = USER_EMAIL;
+    auth.user.password = USER_PASSWORD;
+    // Initialize Firebase
+    Firebase.begin(&config, &auth);
+    Firebase.reconnectWiFi(true);
+    // Delay to ensure connection setup
+    delay(2000);
+The **loop** function:
+    if (Serial.available() > 0) {
+    String password = Serial.readString();
+    password.trim();
+    Serial.println(password);
+    if (!Firebase.RTDB.getJSON(&data, listenerPath)) {
+      Serial.printf("Stream begin error, %s\n", data.errorReason().c_str());
+    }
+    json = data.jsonObject();
+    String jsonStr;
+    json.toString(jsonStr, true);  // 'true' = pretty print (multi-line, indented)
+    Serial.println(jsonStr);
+    FirebaseJsonData status;
+    json.get(status, password);
+    if (!status.success) {
+      Serial.println("Key 'status' not found!");
+    } else {
+      logAccess(password, status.stringValue);
+      if(status.stringValue == "allowed"){
+        digitalWrite(GREEN_LED, HIGH);
+        tone(BUZZER, 1000);
+        delay(200);
+        digitalWrite(GREEN_LED, LOW);
+        noTone(BUZZER);
+      }
+      else{
+        digitalWrite(RED_LED, HIGH);
+        tone(BUZZER, 400);
+        delay(200);
+        digitalWrite(RED_LED, LOW);
+        noTone(BUZZER);
+      }
+    }
+  }