Fix and refactor MQTT client configuration to align with ESP-IDF v5.5+ standards

Author: paclema

CHANGELOG.md

@@ -1,6 +1,11 @@
 MQTTClient: Changelog
 =====================
 
+HEAD
+----
+
+* Fix and refactor MQTT client configuration to align with ESP-IDF v5.5+ standards
+
 v1.0.1 (2025-08-14)
 ------
 

src/MQTTClient.cpp

@@ -196,15 +196,25 @@ void MQTTClient::setup(void) {
 
     // ESP-IDF v5.5
     esp_mqtt_client_config_t mqtt_cfg = {};
+
+    // Broker configuration
     mqtt_cfg.broker.address.uri = broker_url.c_str();
-    mqtt_cfg.credentials_t.set_null_client_id = false;
-    mqtt_cfg.verification_t.use_global_ca_store = this->enable_certificates;
-    mqtt_cfg.credentials_t.client_id = id_name.c_str();
-    mqtt_cfg.credentials_t.authentication_t.username = this->enable_user_and_pass ? user_name.c_str() : NULL;
-    mqtt_cfg.credentials_t.authentication_t.password = this->enable_user_and_pass ? user_password.c_str() : NULL;
-    mqtt_cfg.credentials_t.authentication_t.certificate = this->enable_certificates ? (const char *)client_cert_pem : NULL;
-    mqtt_cfg.credentials_t.authentication_t.client_key_pem = this->enable_certificates ? (const char *)client_key_pem : NULL;
-    mqtt_cfg.task_t.stack_size = task_stack_size;
+    
+    // Credentials configuration
+    mqtt_cfg.credentials.set_null_client_id = false;
+    mqtt_cfg.credentials.client_id = id_name.c_str();
+    mqtt_cfg.credentials.username = this->enable_user_and_pass ? user_name.c_str() : NULL;
+    mqtt_cfg.credentials.authentication.password = this->enable_user_and_pass ? user_password.c_str() : NULL;
+    
+    // Certificate configuration (updated paths)
+    if (this->enable_certificates) {
+        mqtt_cfg.broker.verification.use_global_ca_store = true;
+        mqtt_cfg.credentials.authentication.certificate = (const char *)client_cert_pem;
+        mqtt_cfg.credentials.authentication.key = (const char *)client_key_pem;
+    }
+    
+    // Task configuration
+    mqtt_cfg.task.stack_size = task_stack_size;
 
     ESP_LOGW(TAG, "[APP] Free memory: %d bytes", esp_get_free_heap_size());
     client = esp_mqtt_client_init(&mqtt_cfg);