diff --git a/backend/.env.example b/backend/.env.example
index 5f7926d..e87f290 100644
--- a/backend/.env.example
+++ b/backend/.env.example
@@ -32,3 +32,12 @@ STRIPE_PRODUCT_PREMIUM=prod_xxx
 
 # Admin
 ADMIN_API_KEY=your-admin-api-key
+
+# Legacy API (eluxnetworks.net)
+LEGACY_API_USERNAME=robster
+LEGACY_API_PASSWORD=rob2
+
+# MQTT Configuration (uses Legacy API credentials if not set)
+MQTT_BROKER=mqtt://mqtt.eluxnetworks.net:1883
+MQTT_USER=robster
+MQTT_PASSWORD=rob2
diff --git a/backend/src/services/mqtt.js b/backend/src/services/mqtt.js
index eb1229f..e95928b 100644
--- a/backend/src/services/mqtt.js
+++ b/backend/src/services/mqtt.js
@@ -17,8 +17,8 @@ const { sendPushNotifications: sendNotificationsWithSettings, NotificationType }
 
 // MQTT Configuration
 const MQTT_BROKER = process.env.MQTT_BROKER || 'mqtt://mqtt.eluxnetworks.net:1883';
-const MQTT_USER = process.env.MQTT_USER || 'anandk';
-const MQTT_PASSWORD = process.env.MQTT_PASSWORD || 'anandk_8';
+const MQTT_USER = process.env.MQTT_USER || process.env.LEGACY_API_USERNAME || 'robster';
+const MQTT_PASSWORD = process.env.MQTT_PASSWORD || process.env.LEGACY_API_PASSWORD || 'rob2';
 
 // Store for received alerts (in-memory, last 100)
 const alertsCache = [];
diff --git a/services/api.ts b/services/api.ts
index ad5237c..71e82bb 100644
--- a/services/api.ts
+++ b/services/api.ts
@@ -1505,8 +1505,8 @@ class ApiService {
   // ==========================================
 
   // Demo credentials for legacy dashboard
-  private readonly DEMO_LEGACY_USER = 'anandk';
-  private readonly DEMO_LEGACY_PASSWORD = 'anandk_8';
+  private readonly DEMO_LEGACY_USER = 'robster';
+  private readonly DEMO_LEGACY_PASSWORD = 'rob2';
   private readonly DEMO_DEPLOYMENT_ID = 21; // Ferdinand's deployment
 
   // Login to legacy dashboard API