diff --git a/simulator.py b/simulator.py
index aa0ea754..d6aec1a6 100644
--- a/simulator.py
+++ b/simulator.py
@@ -509,7 +509,7 @@ class MultiMQTT:
         c.on_connect = lambda _c, _, __, rc: self._on_connect(name, rc)
         c.on_disconnect = lambda _c, _, __: self._on_disconnect(name)
         try:
-            c.connect(host, port, keepalive=60, clean_start=True)
+            c.connect(host, port, keepalive=120)
             c.loop_start()
         except Exception as e:
             print(f"[MQTT]   ❌ {name} @ {host}:{port} → {e}")
@@ -555,9 +555,9 @@ class MultiMQTT:
             brokers.append(("bunkerm",   BUNKERM_HOST,           BUNKERM_PORT, False, "bunker", "bunker", use_v5))
         
         # OpenRemote MQTT broker (pour agents MQTT créés dans OpenRemote)
-        # Le broker Artemis d'OR accepte les connexions anonymes (pas de credentials)
+        # Le broker Artemis d'OR nécessite MQTTv5 pour l'auth anonyme
         if ENABLE_OPENREMOTE:
-            brokers.append(("openremote", "openremote_manager_1", 1883, False, "", "", use_v5))
+            brokers.append(("openremote", "openremote_manager_1", 1883, False, "", "", True))
         
         print(f"[MQTT] 🔌 Connexion aux brokers (EMQX={enable_emqx}, Mosquitto={enable_mosquitto}, BunkerM={enable_bunkerm})...")
         print("[MQTT] 🔌 Connexion aux brokers...")