Added a few MDs, update README

INTEGRATION.md

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+# HTML FRONTEND + C++ HOOKS
+
+You can definitely run your HTML dashboard in **Chromium kiosk mode** and still have it talk to your existing **C++/Qt backend**. The trick is to bridge the browser UI with your native code. Here are the main approaches:
+
+[Example Code](EXAMPLE_CODE.md)
+
+***
+
+### 🔗 Integration Options
+
+#### 1. **Local WebSocket / TCP server**
+
+* Run a lightweight server inside your C++ app (e.g. using `QtWebSockets` or `QTcpServer`).
+* Your HTML buttons call JavaScript functions that send JSON messages over WebSocket.
+* Example: 
+  ```javascript
+  function sendCommand(cmd, payload={}) {
+    socket.send(JSON.stringify({command: cmd, data: payload}));
+  }
+
+  ```
+  ```cpp
+  // Qt side
+  connect(webSocketServer, &QWebSocketServer::newConnection, this, [=](){
+      auto client = webSocketServer->nextPendingConnection();
+      connect(client, &QWebSocket::textMessageReceived, this, [=](const QString &msg){
+          QJsonDocument doc = QJsonDocument::fromJson(msg.toUtf8());
+          QString cmd = doc["command"].toString();
+          // handle command
+      });
+  });
+
+  ```
+
+#### 2. **REST API (HTTP server)**
+
+* Expose endpoints in your C++ app (`/setRainfall`, `/getStatus`, etc.).
+* HTML buttons use `fetch()` to call these endpoints.
+* Example: 
+  ```javascript
+  fetch("http://localhost:8080/setRainfall", {
+    method: "POST",
+    body: JSON.stringify({value: 12.4}),
+    headers: {"Content-Type":"application/json"}
+  });
+
+  ```
+
+#### 3. **Native Messaging (Chromium extension)**
+
+* If you need tighter integration, you can build a Chromium extension that talks to your C++ app via **Native Messaging**.
+* More complex, but allows secure communication without opening a server port.
+
+***
+
+### 🖥️ Kiosk Mode Setup
+
+* Launch Chromium with flags: 
+  ```shellscript
+  chromium --kiosk --app=file:///home/user/dashboard.html
+
+  ```
+* This runs fullscreen, hides controls, and loads your HTML UI.
+
+***
+
+### ⚙️ Recommended Path
+
+For your case (Qt backend + kiosk UI), the **WebSocket approach** is usually the cleanest:
+
+* Qt has built-in WebSocket support.
+* Easy to send structured JSON messages both ways.
+* Works offline, no need for external servers.
+
+***
+
+### 🚀 Next Step
+
+Would you like me to sketch out a **minimal working example** where:
+
+* A button in the HTML dashboard sends a command (`"toggleSiren"`)
+* Your Qt app receives it and prints/logs the action?
+
+That way you’ll see the full round-trip between Chromium kiosk and your C++ backend.
+
+[Example Code/Flow/Design](https://notes.tck.com.my/workspace/06083e3a-3e03-4e37-8857-6bd2c292ef33/U2XWNlmCHW-UKuJpwMkwK)