diff --git a/src/controllers/installationController.js b/src/controllers/installationController.js
index 62c11089..1df1c564 100644
--- a/src/controllers/installationController.js
+++ b/src/controllers/installationController.js
@@ -1574,6 +1574,92 @@ exports.getMasterSlaveSummary = async (req, reply) => {
 // };
 
 
+// exports.getIotDataByCustomer = async (req, reply) => {
+//   try {
+//     const { customerId } = req.params;
+
+//     if (!customerId) {
+//       return reply.code(400).send({ error: "customerId is required" });
+//     }
+
+//     // Step 1: Get all devices for this customer
+//     const sensors = await Insensors.find({ customerId });
+
+//     if (!sensors.length) {
+//       return reply.code(404).send({ message: "No sensors found for this customer." });
+//     }
+
+//     // Step 2: Get all unique master hardwareIds from connected_to
+//     const masterHardwareIds = [
+//       ...new Set(
+//         sensors.map(s => s.connected_to?.trim()).filter(Boolean)
+//       )
+//     ];
+
+//     // Step 3: Loop over each master (connected_to) and build enriched data
+//     const enrichedMasters = await Promise.all(masterHardwareIds.map(async (hardwareId) => {
+//       const latestRecord = await IotData.findOne({ hardwareId }).sort({ date: -1 }).lean();
+
+//       if (!latestRecord) {
+//         return {
+//           hardwareId,
+//           message: "No IoT data found",
+//           tanks: []
+//         };
+//       }
+
+//       // Get all slaves connected to this master
+//       const connectedSlaves = sensors.filter(sensor => sensor.connected_to?.trim() === hardwareId);
+
+//       const message = latestRecord.tanks.some(t => parseFloat(t.tankHeight || 0) > 0)
+//         ? "GSM is connected"
+//         : "GSM is not connected";
+
+//       // Map connected slaves to tank details
+//       let tanks = connectedSlaves.map(slave => {
+//         const slaveId = slave.hardwareId?.trim();
+//         const matchedTank = latestRecord.tanks.find(tank => tank.tankhardwareId === slaveId);
+
+//         const loraMessage = matchedTank && parseFloat(matchedTank.tankHeight || 0) > 0
+//           ? "LORA is connected"
+//           : "LORA is not connected";
+
+//         return {
+//           tankhardwareId: slaveId,
+//           tankName: slave.tankName ?? null,
+//           tankLocation: slave.tankLocation ?? null,
+//           masterName: slave.masterName ?? null,
+//           location: slave.location ?? null,
+//           loraMessage,
+//           latestTankData: matchedTank ?? null
+//         };
+//       });
+
+//       // ❗ Remove the first tank entry
+//       tanks = tanks.slice(1);
+
+//       return {
+//         hardwareId,
+//         message,
+//         masterName: connectedSlaves[0]?.masterName ?? null,
+//         location: connectedSlaves[0]?.location ?? null,
+//         tanks
+//       };
+//     }));
+
+//     return reply.send({
+//       status_code: 200,
+//       message: "Success",
+//       data: enrichedMasters
+//     });
+
+//   } catch (err) {
+//     console.error("Error fetching IoT data by customerId:", err);
+//     return reply.code(500).send({ error: "Internal Server Error" });
+//   }
+// };
+
+
 exports.getIotDataByCustomer = async (req, reply) => {
   try {
     const { customerId } = req.params;
@@ -1582,21 +1668,16 @@ exports.getIotDataByCustomer = async (req, reply) => {
       return reply.code(400).send({ error: "customerId is required" });
     }
 
-    // Step 1: Get all devices for this customer
     const sensors = await Insensors.find({ customerId });
 
     if (!sensors.length) {
       return reply.code(404).send({ message: "No sensors found for this customer." });
     }
 
-    // Step 2: Get all unique master hardwareIds from connected_to
     const masterHardwareIds = [
-      ...new Set(
-        sensors.map(s => s.connected_to?.trim()).filter(Boolean)
-      )
+      ...new Set(sensors.map(s => s.connected_to?.trim()).filter(Boolean))
     ];
 
-    // Step 3: Loop over each master (connected_to) and build enriched data
     const enrichedMasters = await Promise.all(masterHardwareIds.map(async (hardwareId) => {
       const latestRecord = await IotData.findOne({ hardwareId }).sort({ date: -1 }).lean();
 
@@ -1608,21 +1689,28 @@ exports.getIotDataByCustomer = async (req, reply) => {
         };
       }
 
-      // Get all slaves connected to this master
-      const connectedSlaves = sensors.filter(sensor => sensor.connected_to?.trim() === hardwareId);
+      // ✅ Use timestamp to check GSM connection
+      const indiaTime = moment.tz(latestRecord.date, "Asia/Kolkata");
+      const now = moment.tz("Asia/Kolkata");
+      const diffInMinutes = now.diff(indiaTime, "minutes");
+      const gsmConnected = diffInMinutes <= 1;
 
-      const message = latestRecord.tanks.some(t => parseFloat(t.tankHeight || 0) > 0)
-        ? "GSM is connected"
-        : "GSM is not connected";
+      const message = gsmConnected ? "GSM is connected" : "GSM is not connected";
+
+      // Get all connected slaves
+      const connectedSlaves = sensors.filter(sensor => sensor.connected_to?.trim() === hardwareId);
 
-      // Map connected slaves to tank details
-      let tanks = connectedSlaves.map(slave => {
+      // Enrich tanks
+      const tanks = connectedSlaves.map(slave => {
         const slaveId = slave.hardwareId?.trim();
         const matchedTank = latestRecord.tanks.find(tank => tank.tankhardwareId === slaveId);
 
-        const loraMessage = matchedTank && parseFloat(matchedTank.tankHeight || 0) > 0
-          ? "LORA is connected"
-          : "LORA is not connected";
+        let loraConnected = false;
+        if (matchedTank?.date) {
+          const tankTime = moment.tz(matchedTank.date, "Asia/Kolkata");
+          const loraDiff = now.diff(tankTime, "minutes");
+          loraConnected = loraDiff <= 1;
+        }
 
         return {
           tankhardwareId: slaveId,
@@ -1630,14 +1718,11 @@ exports.getIotDataByCustomer = async (req, reply) => {
           tankLocation: slave.tankLocation ?? null,
           masterName: slave.masterName ?? null,
           location: slave.location ?? null,
-          loraMessage,
+          loraMessage: loraConnected ? "LORA is connected" : "LORA is not connected",
           latestTankData: matchedTank ?? null
         };
       });
 
-      // ❗ Remove the first tank entry
-      tanks = tanks.slice(1);
-
       return {
         hardwareId,
         message,
@@ -1658,4 +1743,3 @@ exports.getIotDataByCustomer = async (req, reply) => {
     return reply.code(500).send({ error: "Internal Server Error" });
   }
 };
-