Merge branch 'main' of ssh://gitlab.fdmci.hva.nl/technische-informatica-sm3/ti-projectten/rooziinuubii79

src/C++/MQTT/main.cpp

@@ -1,56 +1,64 @@
 #include <iostream>
 #include <mqtt/async_client.h>
-#include <thread>  // Voor std::this_thread::sleep_for
+#include <thread>  // For std::this_thread::sleep_for
-#include <chrono>  // Voor std::chrono::seconds
+#include <chrono>  // For std::chrono::seconds
 
-const std::string ADDRESS("mqtt://localhost:1883");  // Aanpassen indien nodig
+// Define the address of the MQTT broker, the client ID, and the topic to subscribe to.
+const std::string ADDRESS("mqtt://localhost:1883");  // Broker address (Raspberry Pi)
 const std::string CLIENT_ID("raspberry_pi_client");
 const std::string TOPIC("home/commands");
 
+// Define a callback class that handles incoming messages and connection events.
 class callback : public virtual mqtt::callback {
+  // Called when a message arrives on a subscribed topic.
   void message_arrived(mqtt::const_message_ptr msg) override {
-    std::cout << "Ontvangen bericht: '" << msg->get_topic()
+    std::cout << "Received message: '" << msg->get_topic()<< "' : " << msg->to_string() << std::endl;
-              << "' : " << msg->to_string() << std::endl;
-    // Doe iets met het bericht, bijvoorbeeld een GP.IO-activering
   }
 
+  // Called when the connection to the broker is lost.
   void connection_lost(const std::string& cause) override {
-    std::cerr << "Verbinding verloren. Oorzaak: " << cause << std::endl;
+    std::cerr << "Connection lost. Reason: " << cause << std::endl;
   }
 
+  // Called when a message delivery is complete.
   void delivery_complete(mqtt::delivery_token_ptr token) override {
-    std::cout << "Bericht afgeleverd!" << std::endl;
+    std::cout << "Message delivered!" << std::endl;
   }
 };
 
 int main() {
+  // Create an MQTT async client and set up the callback class.
   mqtt::async_client client(ADDRESS, CLIENT_ID);
   callback cb;
   client.set_callback(cb);
 
+  // Set up the connection options (such as username and password).
   mqtt::connect_options connOpts;
   connOpts.set_clean_session(true);
   connOpts.set_user_name("ishak");
   connOpts.set_password("kobuki");
-  connOpts.set_mqtt_version(MQTTVERSION_3_1_1);  // Voor MQTT 3.1.1
+  connOpts.set_mqtt_version(MQTTVERSION_3_1_1);
 
   try {
-    std::cout << "Verbinden met broker..." << std::endl;
+    // Try to connect to the broker and wait until successful.
-    client.connect(connOpts)->wait();
+    std::cout << "Connecting to broker..." << std::endl;
-    std::cout << "Verbonden!" << std::endl;
+    client.connect(connOpts)->wait();  // Connect with the provided options
+    std::cout << "Connected!" << std::endl;
 
-    std::cout << "Abonneren op topic: " << TOPIC << std::endl;
+    // Subscribe to the specified topic and wait for confirmation.
-    client.subscribe(TOPIC, 1)->wait();
+    std::cout << "Subscribing to topic: " << TOPIC << std::endl;
+    client.subscribe(TOPIC, 1)->wait();  // Subscribe with QoS level 1
 
-    // Houd de client draaiende om berichten te blijven ontvangen
+    // Keep the program running to continue receiving messages from the broker.
     while (true) {
-      std::this_thread::sleep_for(std::chrono::seconds(1));  // Wacht om CPU-gebruik te verminderen
+      std::this_thread::sleep_for(std::chrono::seconds(1));  // Sleep to reduce CPU usage
     }
 
   } catch (const mqtt::exception &exc) {
-    std::cerr << "Fout: " << exc.what() << std::endl;
+    // Catch any MQTT exceptions and display the error message.
+    std::cerr << "Error: " << exc.what() << std::endl;
     return 1;
   }
 
-  return 0;
+  return 0;  // Return 0 to indicate successful execution
 }