diff --git a/src/controllers/installationController.js b/src/controllers/installationController.js
index fb10db0f..cc03c824 100644
--- a/src/controllers/installationController.js
+++ b/src/controllers/installationController.js
@@ -1822,64 +1822,48 @@ exports.getMasterSlaveSummary = async (req, reply) => {
 
      
       for (const slave of slaves) {
-        const slaveIot = await IotData.findOne({ hardwareId: slave.connected_to })
-          .sort({ date: -1, time: -1 })
-          .lean();
-      console.log("slaveIot",slaveIot)
+        const now = moment.tz("Asia/Kolkata");
         let connectedLoraDate = null;
         let connectedLoraTime = null;
-      
-        // if (slaveIot?.date && slaveIot?.time) {
-        //   const indiaTime = moment.tz(`${slaveIot.date} ${slaveIot.time}`, "Asia/Kolkata");
-        //   connectedLoraDate = indiaTime.format("DD-MM-YYYY");
-        //   connectedLoraTime = indiaTime.format("HH:mm:ss");
-        // }
-      
-        // const tankHeight = await getTankHeight(slave.tankhardwareId);
-        // let loraStatus = (tankHeight === null || tankHeight === 0) ? "disconnected" : "connected";
-      
-        // const loraLastDisconnect = loraStatus === "disconnected" && connectedLoraDate && connectedLoraTime
-        //   ? `${connectedLoraDate} ${connectedLoraTime}`
-        //   : slave.lora_last_disconnect_time || null;
         let loraStatus = "disconnected";
         let loraLastDisconnect = slave.lora_last_disconnect_time || null;
+        let loraLastCheckTime = now.format("DD-MM-YYYY HH:mm:ss");
         let tankHeight = null;
       
+        // Fetch latest IotData for slave's hardwareId (NOT master's)
+        const slaveIot = await IotData.findOne({ hardwareId: slave.connected_to })
+          .sort({ date: -1, time: -1 })
+          .lean();
+      
         if (slaveIot?.tanks?.length && slave.tankhardwareId) {
           const matchedTank = slaveIot.tanks.find(
             t => t.tankhardwareId === slave.tankhardwareId
           );
       
           if (matchedTank) {
-            tankHeight = parseFloat(matchedTank.tankHeight) || 0;
-          
             const indiaTime = moment.tz(
               `${moment(matchedTank.date).format("YYYY-MM-DD")} ${matchedTank.time}`,
               "YYYY-MM-DD HH:mm:ss",
               "Asia/Kolkata"
             );
-          
+      
             connectedLoraDate = indiaTime.format("DD-MM-YYYY");
             connectedLoraTime = indiaTime.format("HH:mm:ss");
-          
-            loraStatus = tankHeight > 0 ? "connected" : "disconnected";
-          
-            // ⛔ Override if master is disconnected
-            if (gsmStatus === "disconnected") {
-              loraStatus = "disconnected";
-            }
-          
+      
+            tankHeight = parseFloat(matchedTank.tankHeight) || 0;
+      
+            const diffMinutes = now.diff(indiaTime, "minutes");
+      
+            // Connected if tankHeight > 0 and data not older than 5 mins
+            loraStatus = (tankHeight > 0 && diffMinutes <= 1) ? "connected" : "disconnected";
+      
             if (loraStatus === "disconnected") {
-              if (connectedLoraDate && connectedLoraTime) {
-                loraLastDisconnect = `${connectedLoraDate} ${connectedLoraTime}`;
-              } else {
-                loraLastDisconnect = slave.lora_last_disconnect_time || null;
-              }
+              loraLastDisconnect = `${connectedLoraDate} ${connectedLoraTime}`;
             }
           }
-          
         }
-        // Update in DB
+      
+        // Update DB with new status and timestamps
         await Insensors.updateOne(
           { hardwareId: slave.hardwareId },
           {
@@ -1887,8 +1871,9 @@ exports.getMasterSlaveSummary = async (req, reply) => {
               connected_status: loraStatus,
               connected_lora_date: connectedLoraDate,
               connected_lora_time: connectedLoraTime,
-              lora_last_disconnect_time: loraLastDisconnect
-            }
+              lora_last_check_time: loraLastCheckTime,
+              lora_last_disconnect_time: loraLastDisconnect,
+            },
           }
         );
       
@@ -1900,12 +1885,15 @@ exports.getMasterSlaveSummary = async (req, reply) => {
           connected_status: loraStatus,
           connected_lora_date: connectedLoraDate,
           connected_lora_time: connectedLoraTime,
+          lora_last_check_time: loraLastCheckTime,
           lora_last_disconnect_time: loraLastDisconnect,
           type: slave.type || "slave",
-          connected_to: slave.connected_to || null
+          connected_to: slave.connected_to || null,
         });
       }
       
+      
+      
       result.push({
         hardwareId: master.hardwareId,
         masterName,