diff --git a/back/src/Controller/IoSocketController.ts b/back/src/Controller/IoSocketController.ts
index 9110702e..57e204f4 100644
--- a/back/src/Controller/IoSocketController.ts
+++ b/back/src/Controller/IoSocketController.ts
@@ -27,7 +27,13 @@ import {
     SetPlayerDetailsMessage,
     SubMessage,
     UserMovedMessage,
-    BatchMessage, GroupUpdateMessage, PointMessage, GroupDeleteMessage, UserJoinedMessage, UserLeftMessage
+    BatchMessage,
+    GroupUpdateMessage,
+    PointMessage,
+    GroupDeleteMessage,
+    UserJoinedMessage,
+    UserLeftMessage,
+    ItemEventMessage
 } from "../Messages/generated/messages_pb";
 import {UserMovesMessage} from "../Messages/generated/messages_pb";
 import Direction = PositionMessage.Direction;
@@ -433,22 +439,42 @@ export class IoSocketController {
                 }
             });
 
-            socket.on(SocketIoEvent.ITEM_EVENT, (itemEvent: unknown) => {
-                if (!isItemEventMessageInterface(itemEvent)) {
+            socket.on(SocketIoEvent.ITEM_EVENT, (message: unknown) => {
+                if (!(message instanceof Buffer)) {
+                    socket.emit(SocketIoEvent.MESSAGE_ERROR, {message: 'Invalid ITEM_EVENT message. Expecting binary buffer.'});
+                    console.warn('Invalid ITEM_EVENT message received (expecting binary buffer): ', message);
+                    return;
+                }
+                const itemEventMessage = ItemEventMessage.deserializeBinary(new Uint8Array(message));
+
+                const itemEvent = ProtobufUtils.toItemEvent(itemEventMessage);
+
+                /*if (!isItemEventMessageInterface(itemEvent)) {
                     socket.emit(SocketIoEvent.MESSAGE_ERROR, {message: 'Invalid ITEM_EVENT message.'});
                     console.warn('Invalid ITEM_EVENT message received: ', itemEvent);
                     return;
-                }
+                }*/
                 try {
                     const Client = (socket as ExSocketInterface);
 
-                    socket.to(Client.roomId).emit(SocketIoEvent.ITEM_EVENT, itemEvent);
+                    //socket.to(Client.roomId).emit(SocketIoEvent.ITEM_EVENT, itemEvent);
 
                     const world = this.Worlds.get(Client.roomId);
                     if (!world) {
                         console.error("Could not find world with id '", Client.roomId, "'");
                         return;
                     }
+
+                    const subMessage = new SubMessage();
+                    subMessage.setItemeventmessage(itemEventMessage);
+
+                    // Let's send the event without using the SocketIO room.
+                    for (let user of world.getUsers().values()) {
+                        const client = this.searchClientByIdOrFail(user.id);
+                        //client.emit(SocketIoEvent.ITEM_EVENT, itemEvent);
+                        emitInBatch(client, SocketIoEvent.ITEM_EVENT, subMessage);
+                    }
+
                     world.setItemState(itemEvent.itemId, itemEvent.state);
                 } catch (e) {
                     console.error('An error occurred on "item_event"');
diff --git a/back/src/Model/Websocket/ProtobufUtils.ts b/back/src/Model/Websocket/ProtobufUtils.ts
index 4e5aec02..aa6810a4 100644
--- a/back/src/Model/Websocket/ProtobufUtils.ts
+++ b/back/src/Model/Websocket/ProtobufUtils.ts
@@ -1,7 +1,8 @@
 import {PointInterface} from "./PointInterface";
-import {PositionMessage} from "../../Messages/generated/messages_pb";
+import {ItemEventMessage, PositionMessage} from "../../Messages/generated/messages_pb";
 import {ExSocketInterface} from "_Model/Websocket/ExSocketInterface";
 import Direction = PositionMessage.Direction;
+import {ItemEventMessageInterface} from "_Model/Websocket/ItemEventMessage";
 
 export class ProtobufUtils {
 
@@ -32,4 +33,23 @@ export class ProtobufUtils {
 
         return position;
     }
+
+    public static toItemEvent(itemEventMessage: ItemEventMessage): ItemEventMessageInterface {
+        return {
+            itemId: itemEventMessage.getItemid(),
+            event: itemEventMessage.getEvent(),
+            parameters: JSON.parse(itemEventMessage.getParametersjson()),
+            state: JSON.parse(itemEventMessage.getStatejson()),
+        }
+    }
+
+    public static toItemEventProtobuf(itemEvent: ItemEventMessageInterface): ItemEventMessage {
+        const itemEventMessage = new ItemEventMessage();
+        itemEventMessage.setItemid(itemEvent.itemId);
+        itemEventMessage.setEvent(itemEvent.event);
+        itemEventMessage.setParametersjson(JSON.stringify(itemEvent.parameters));
+        itemEventMessage.setStatejson(JSON.stringify(itemEvent.state));
+
+        return itemEventMessage;
+    }
 }
diff --git a/front/src/Connection.ts b/front/src/Connection.ts
index faf080f0..8201b5af 100644
--- a/front/src/Connection.ts
+++ b/front/src/Connection.ts
@@ -2,7 +2,7 @@ import Axios from "axios";
 import {API_URL} from "./Enum/EnvironmentVariable";
 import {MessageUI} from "./Logger/MessageUI";
 import {
-    BatchMessage, GroupDeleteMessage, GroupUpdateMessage,
+    BatchMessage, GroupDeleteMessage, GroupUpdateMessage, ItemEventMessage,
     PositionMessage,
     SetPlayerDetailsMessage, UserJoinedMessage, UserLeftMessage, UserMovedMessage,
     UserMovesMessage,
@@ -173,6 +173,9 @@ export class Connection implements Connection {
                 } else if (message.hasUserleftmessage()) {
                     event = EventMessage.USER_LEFT;
                     payload = message.getUserleftmessage();
+                } else if (message.hasItemeventmessage()) {
+                    event = EventMessage.ITEM_EVENT;
+                    payload = message.getItemeventmessage();
                 } else {
                     throw new Error('Unexpected batch message type');
                 }
@@ -400,16 +403,24 @@ export class Connection implements Connection {
         this.socket.on(EventMessage.WEBRTC_DISCONNECT, callback);
     }
 
-    emitActionableEvent(itemId: number, event: string, state: unknown, parameters: unknown) {
-        return this.socket.emit(EventMessage.ITEM_EVENT, {
-            itemId,
-            event,
-            state,
-            parameters
-        });
+    emitActionableEvent(itemId: number, event: string, state: unknown, parameters: unknown): void {
+        const itemEventMessage = new ItemEventMessage();
+        itemEventMessage.setItemid(itemId);
+        itemEventMessage.setEvent(event);
+        itemEventMessage.setStatejson(JSON.stringify(state));
+        itemEventMessage.setParametersjson(JSON.stringify(parameters));
+
+        this.socket.emit(EventMessage.ITEM_EVENT, itemEventMessage.serializeBinary().buffer);
     }
 
     onActionableEvent(callback: (message: ItemEventMessageInterface) => void): void {
-        this.socket.on(EventMessage.ITEM_EVENT, callback);
+        this.onBatchMessage(EventMessage.ITEM_EVENT, (message: ItemEventMessage) => {
+            callback({
+                itemId: message.getItemid(),
+                event: message.getEvent(),
+                parameters: JSON.parse(message.getParametersjson()),
+                state: JSON.parse(message.getStatejson())
+            });
+        });
     }
 }
diff --git a/messages/messages.proto b/messages/messages.proto
index 01782e57..57b1f2ea 100644
--- a/messages/messages.proto
+++ b/messages/messages.proto
@@ -39,6 +39,14 @@ message UserMovesMessage {
   ViewportMessage viewport = 2;
 }
 
+/************ BI-DIRECTIONAL MESSAGES **************/
+
+message ItemEventMessage {
+  int32 itemId = 1;
+  string event = 2;
+  string stateJson = 3;
+  string parametersJson = 4;
+}
 
 /*********** SERVER TO CLIENT MESSAGES *************/
 
@@ -54,6 +62,7 @@ message SubMessage {
     GroupDeleteMessage groupDeleteMessage = 3;
     UserJoinedMessage userJoinedMessage = 4;
     UserLeftMessage userLeftMessage = 5;
+    ItemEventMessage itemEventMessage = 6;
   }
 }