diff --git a/src/controllers/installationController.js b/src/controllers/installationController.js
index 2966daac..f916211a 100644
--- a/src/controllers/installationController.js
+++ b/src/controllers/installationController.js
@@ -920,6 +920,8 @@ exports.mastrerList = async (req, reply) => {
 //   }
 // }
 
+const moment = require('moment'); // For time calculations
+
 exports.getMasterSlaveSummary = async (req, reply) => {
   try {
     const { customerId } = req.params;
@@ -929,12 +931,43 @@ exports.getMasterSlaveSummary = async (req, reply) => {
     }
 
     // Get all devices for customer
-    const allDevices = await Insensors.find({ customerId }).lean();
+    const allDevices = await Insensors.find({ customerId });
 
     // Separate masters and slaves
     const masters = allDevices.filter(device => device.type === 'master');
     const slaves = allDevices.filter(device => device.type === 'slave');
 
+    // Update connected_status for each sensor
+    const updateStatusPromises = allDevices.map(async device => {
+      const hwId = device.connected_to;
+      if (!hwId) return;
+
+      const latestData = await IotData.findOne({ hardwareId: hwId })
+        .sort({ date: -1 })
+        .lean();
+
+      let status = "disconnected";
+
+      if (latestData?.date) {
+        const now = moment();
+        const lastSeen = moment(latestData.date);
+        const diff = now.diff(lastSeen, 'minutes');
+        if (diff <= 10) {
+          status = "connected";
+        }
+      }
+
+      await Insensors.updateOne(
+        { _id: device._id },
+        { $set: { connected_status: status } }
+      );
+
+      device.connected_status = status; // Also update in-memory object
+      console.log(" device.connected_status", device.connected_status)
+    });
+
+    await Promise.all(updateStatusPromises);
+
     // Map masters to their connected slaves based on `connected_to` match
     const enrichedMasters = masters.map(master => {
       const masterConnectionId = master.connected_to;
@@ -944,7 +977,7 @@ exports.getMasterSlaveSummary = async (req, reply) => {
       );
 
       return {
-        ...master,
+        ...master.toObject(),
         connected_slave_count: connectedSlaves.length,
         connected_slaves: connectedSlaves
       };
@@ -965,7 +998,7 @@ exports.getMasterSlaveSummary = async (req, reply) => {
       message: "Internal Server Error"
     });
   }
-}
+};
 
 
 // exports.getIotDataByCustomer = async (req, reply) => {
diff --git a/src/models/store.js b/src/models/store.js
index 26e664a7..6d7be765 100644
--- a/src/models/store.js
+++ b/src/models/store.js
@@ -361,7 +361,8 @@ const insensorsSchema = new mongoose.Schema({
   tankName: { type: String, default: "0" },
   tankLocation: { type: String, default: "0" },
   connected_slave: { type: String, default: null },
-  
+  connected_status: { type: String, enum: ["connected", "Not connected", "unknown"], default: "unknown" },
+
   quality_check_details: [{
     damage_check: { result: String },
     stickering_check: { result: String },