feat: Enhance MQTT topic handling and logging in setup process

Author: dnigamer

esp32-pit/backend_network.cpp

@@ -488,6 +488,16 @@ bool fetchHardwareConfig(String macAddress, uint8_t* macBytes) {
         sysPref.begin("sys-config", false);
         sysPref.putString("topicSensors", topicSensors);
 
+        if (!data["mqttCommandTopic"].isNull()) {
+          topicDeviceSub = data["mqttCommandTopic"].as<String>();
+          fmtSerial.println("[BOOT] Tópico de Comandos definido: " + topicDeviceSub);
+        }
+
+        if (!data["mqttConfigTopic"].isNull()) {
+          topicConfigSub = data["mqttConfigTopic"].as<String>();
+          fmtSerial.println("[BOOT] Tópico de Configuração definido: " + topicConfigSub);
+        }
+        
         if (!data["modoAtual"].isNull()) {
           String modoStr = data["modoAtual"].as<String>();
           if (modoStr == "MISTO") opMode = 0;

esp32-pit/esp32-pit.ino

@@ -274,6 +274,7 @@ void setup() {
   // Topic defaults se fetch falhar
   String macDashes = String(macStr);
   macDashes.replace(":", "-");
+  macDashes.toLowerCase(); // Backend usa minúsculas para tópicos
   topicDeviceSub = "campus/device/" + macDashes + "/#";
   topicConfigSub = "campus/config/" + macDashes + "/#";
 
@@ -338,14 +339,24 @@ void setup() {
     }
 
     if (connected) {
-      client.subscribe(topicConfigSub.c_str());
-      client.subscribe(topicDeviceSub.c_str());
+      if (topicConfigSub.length() > 0) {
+        client.subscribe(topicConfigSub.c_str());
+        fmtSerial.println("[MQTT] Subscrito em: " + topicConfigSub);
+      }
+      if (topicDeviceSub.length() > 0) {
+        client.subscribe(topicDeviceSub.c_str());
+        fmtSerial.println("[MQTT] Subscrito em: " + topicDeviceSub);
+      }
       long sala_id = preferences.getLong("salaId", 0);
       if (sala_id > 0) {
-        client.subscribe((String("campus/sala/") + sala_id + "/admin/#").c_str());
+        String roomSub = String("campus/sala/") + sala_id + "/admin/#";
+        client.subscribe(roomSub.c_str());
+        fmtSerial.println("[MQTT] Subscrito em: " + roomSub);
       }
       client.subscribe("campus/all/admin/#");
+      fmtSerial.println("[MQTT] Subscrito em: campus/all/admin/#");
       client.subscribe("campus/config/all/#");
+      fmtSerial.println("[MQTT] Subscrito em: campus/config/all/#");
       tft.fillRect(10, 140, 220, 30, ST77XX_BLACK); tft.setCursor(10, 140); tft.setTextColor(ST77XX_GREEN, ST77XX_BLACK); tft.print("MQTT: Ligado!");
     } else {
       tft.fillRect(10, 140, 220, 30, ST77XX_BLACK); tft.setCursor(10, 140); tft.setTextColor(ST77XX_RED, ST77XX_BLACK); tft.print("MQTT: Falhou");