diff --git a/data-flow-diagram.md b/data-flow-diagram.md
index 7806ca48..62da8224 100644
--- a/data-flow-diagram.md
+++ b/data-flow-diagram.md
@@ -10,79 +10,48 @@ Ce diagramme illustre le flux complet des données IoT du simulateur vers les di
 
 ```mermaid
 graph TB
-    subgraph S1["COUCHE 1 SOURCES"]
-        SIM[Smart City Simulator]
-        SENS[Capteurs IoT Reels]
-    end
+    SIM[Smart City Simulator]
+    SENS[Capteurs IoT Reels]
+    EMQ[EMQX]
+    MOS[Mosquitto]
+    BUN[BunkerM]
+    ORI[Orion-LD]
+    STE[Stellio]
+    FRO[FROST-Server]
+    ORM[OpenRemote Manager]
+    KC[Keycloak]
+    INF[InfluxDB]
+    PRO[Prometheus]
+    GEO[GeoServer]
+    GRA[Grafana]
+    MAP[MapStore]
+    UI[OpenRemote UI]
 
-    subgraph S2["COUCHE 2 MQTT BROKERS"]
-        EMQ[EMQX]
-        MOS[Mosquitto]
-        BUN[BunkerM]
-    end
-
-    subgraph S3["COUCHE 3 CONTEXT BROKERS"]
-        ORI[Orion-LD]
-        STE[Stellio]
-        FRO[FROST-Server]
-    end
-
-    subgraph S4["COUCHE 4 IoT OpenRemote"]
-        ORM[OpenRemote Manager]
-        KC[Keycloak]
-    end
-
-    subgraph S5["COUCHE 5 STOCKAGE"]
-        INF[InfluxDB]
-        PRO[Prometheus]
-        GEO[GeoServer]
-    end
-
-    subgraph S6["COUCHE 6 VISUALISATION"]
-        GRA[Grafana]
-        MAP[MapStore]
-        UI[OpenRemote UI]
-    end
-
-    SIM -->|MQTT| EMQ
-    SIM -->|MQTT| MOS
-    SIM -->|MQTTS| BUN
-    SENS -->|MQTT| EMQ
-    SENS -.->|MQTT direct| ORM
-    EMQ -->|NGSI-LD| ORI
-    EMQ -->|NGSI-LD| STE
-    EMQ -->|SensorThings| FRO
-    EMQ -->|MQTT Agent| ORM
-    MOS -->|MQTT Agent| ORM
-    BUN -->|MQTT Agent| ORM
+    SIM --> EMQ
+    SIM --> MOS
+    SIM --> BUN
+    SENS --> EMQ
+    SENS -.-> ORM
+    EMQ --> ORI
+    EMQ --> STE
+    EMQ --> FRO
+    EMQ --> ORM
+    MOS --> ORM
+    BUN --> ORM
     ORM -.-> KC
-    SIM -->|HTTP| INF
-    ORI -->|Query| GRA
-    STE -->|Query| GRA
-    FRO -->|Query| GRA
-    ORI -.->|PostGIS| GEO
-    STE -.->|PostGIS| GEO
-    FRO -.->|PostGIS| GEO
-    GEO -->|WMS/WFS| MAP
-    ORM -->|API Query| GRA
-    EMQ -.->|Metrics| PRO
-    ORI -.->|Metrics| PRO
-    STE -.->|Metrics| PRO
-    ORM -.->|Metrics| PRO
-
-    classDef simulator fill:#1e293b,stroke:#fb923c,stroke-width:2px,color:#fff
-    classDef broker fill:#0f172a,stroke:#22d3ee,stroke-width:2px,color:#fff
-    classDef context fill:#0f172a,stroke:#34d399,stroke-width:2px,color:#fff
-    classDef iot fill:#0f172a,stroke:#a78bfa,stroke-width:2px,color:#fff
-    classDef storage fill:#0f172a,stroke:#fbbf24,stroke-width:2px,color:#fff
-    classDef viz fill:#0f172a,stroke:#22d3ee,stroke-width:2px,color:#fff
-
-    class SIM,SENS simulator
-    class EMQ,MOS,BUN broker
-    class ORI,STE,FRO context
-    class ORM,KC iot
-    class INF,PRO,GEO storage
-    class GRA,MAP,UI viz
+    SIM --> INF
+    ORI --> GRA
+    STE --> GRA
+    FRO --> GRA
+    ORI -.-> GEO
+    STE -.-> GEO
+    FRO -.-> GEO
+    GEO --> MAP
+    ORM --> GRA
+    EMQ -.-> PRO
+    ORI -.-> PRO
+    STE -.-> PRO
+    ORM -.-> PRO
 ```
 
 ---