diff --git a/src/controllers/installationController.js b/src/controllers/installationController.js
index 7ca2e1af..62c11089 100644
--- a/src/controllers/installationController.js
+++ b/src/controllers/installationController.js
@@ -1054,19 +1054,13 @@ exports.getMasterSlaveSummary = async (req, reply) => {
       const hardwareId = device.hardwareId?.trim();
       if (!hardwareId) return device.toObject();
 
-      // Fetch latest IoT data
-      const latestData = await IotData.findOne({ hardwareId })
-        .sort({ date: -1 })
-        .lean();
-
+      const latestData = await IotData.findOne({ hardwareId }).sort({ date: -1 }).lean();
       const enriched = device.toObject();
 
-      // Add GSM Connection info (date/time/status) for master
       if (latestData?.date) {
         const indiaTime = moment.tz(latestData.date, "Asia/Kolkata");
         const date = indiaTime.format("DD-MM-YYYY");
         const time = indiaTime.format("HH:mm:ss");
-
         const now = moment.tz("Asia/Kolkata");
         const diffInMinutes = now.diff(indiaTime, "minutes");
         const isGSMConnected = diffInMinutes <= 1;
@@ -1076,16 +1070,15 @@ exports.getMasterSlaveSummary = async (req, reply) => {
           enriched.connected_gsm_date = date;
           enriched.connected_gsm_time = time;
           enriched.gsm_connected_status = gsmStatus;
+          enriched.gsm_last_check_time = indiaTime.format("YYYY-MM-DD HH:mm:ss");
         }
       }
 
-      // Add LoRa Connection info for slaves (per-tank)
       if (latestData?.tanks && Array.isArray(latestData.tanks)) {
         const enrichedTanks = latestData.tanks.map(tank => {
           const tankMoment = moment.tz(tank.date, "Asia/Kolkata");
           const tankDiff = moment.tz("Asia/Kolkata").diff(tankMoment, "minutes");
           const loraStatus = tankDiff <= 1 ? "connected" : "disconnected";
-
           return {
             ...tank,
             connected_status: loraStatus
@@ -1094,36 +1087,36 @@ exports.getMasterSlaveSummary = async (req, reply) => {
 
         enriched.tanks = enrichedTanks;
 
-        // Update LoRa status for the device itself (if slave)
         if (device.type === 'slave') {
           const connectedTank = enrichedTanks.find(tank => tank.tankhardwareId === device.hardwareId);
           enriched.lora_connected_status = connectedTank ? connectedTank.connected_status : "disconnected";
-          enriched.connected_lora_date = connectedTank ? connectedTank.date : null;
+          enriched.connected_lora_date = connectedTank ? moment(connectedTank.date).tz("Asia/Kolkata").format("DD-MM-YYYY") : null;
           enriched.connected_lora_time = connectedTank ? connectedTank.time : null;
+          enriched.lora_last_check_time = connectedTank ? moment(connectedTank.date).tz("Asia/Kolkata").format("YYYY-MM-DD HH:mm:ss") : null;
         }
       }
 
-      // Remove GSM fields for slave devices and LoRa fields for master devices
       if (device.type === 'slave') {
         delete enriched.connected_gsm_date;
         delete enriched.connected_gsm_time;
         delete enriched.gsm_connected_status;
+        delete enriched.gsm_last_check_time;
       }
 
       if (device.type === 'master') {
         delete enriched.connected_lora_date;
         delete enriched.connected_lora_time;
         delete enriched.lora_connected_status;
+        delete enriched.lora_last_check_time;
+        delete enriched.tanks; // ✅ Remove tanks for master
       }
 
       return enriched;
     };
 
-    // Enrich masters and slaves with timestamps and connection statuses
     const enrichedMasters = await Promise.all(masters.map(enrichDeviceWithTimestamp));
     const enrichedSlaves = await Promise.all(slaves.map(enrichDeviceWithTimestamp));
 
-    // Match slaves to their masters
     const masterSummary = enrichedMasters.map(master => {
       const connectedSlaves = enrichedSlaves.filter(slave => slave.connected_to === master.connected_to);
       return {