diff --git a/src/controllers/installationController.js b/src/controllers/installationController.js
index deac953e..bd19ea75 100644
--- a/src/controllers/installationController.js
+++ b/src/controllers/installationController.js
@@ -749,6 +749,7 @@ exports.getByHardwareAndTankId = async (req, reply) => {
 
     console.log("📡 Fetching data for:", { hardwareId, tankhardwareId });
 
+    // Get the latest IoT data for the master hardwareId
     const latestData = await IotData.findOne({ hardwareId }).sort({ date: -1 }).lean();
 
     if (!latestData || !Array.isArray(latestData.tanks)) {
@@ -757,18 +758,28 @@ exports.getByHardwareAndTankId = async (req, reply) => {
 
     const now = new Date();
     const dataDate = new Date(latestData.date);
+
+    // Check master GSM connection (threshold 60 sec)
     const isGSMConnected = now - dataDate <= 60000;
 
+    // Find the tank for the slave
     const matchedTank = latestData.tanks.find(tank => tank.tankhardwareId === tankhardwareId);
-
     if (!matchedTank) {
       return reply.code(404).send({ message: "Tank not found in latest record" });
     }
 
     const tankHeight = parseFloat(matchedTank.tankHeight || "0");
-    const isLoraConnected = isGSMConnected && tankHeight > 0;
 
-    // Format date and time
+    // If master is disconnected => slave is disconnected too
+    let isLoraConnected = false;
+    if (!isGSMConnected) {
+      isLoraConnected = false;
+    } else {
+      // Otherwise use tankHeight to determine LoRa connection
+      isLoraConnected = tankHeight > 0;
+    }
+
+    // Format tank date/time to IST
     const matchedTankDateObj = new Date(matchedTank.date);
     const formattedDate = moment(matchedTankDateObj).tz("Asia/Kolkata").format("DD-MM-YYYY");
     const formattedTime = matchedTank.time || moment(matchedTankDateObj).tz("Asia/Kolkata").format("HH:mm:ss");
@@ -776,33 +787,31 @@ exports.getByHardwareAndTankId = async (req, reply) => {
     matchedTank.date = formattedDate;
     matchedTank.time = formattedTime;
 
+    // Prepare update object for Insensors collection
     const updateFields = {
       connected_status: isLoraConnected ? "connected" : "disconnected",
       connected_lora_date: formattedDate,
       connected_lora_time: formattedTime,
       lora_last_check_time: moment().tz("Asia/Kolkata").format("DD-MM-YYYY HH:mm:ss")
     };
-
-    // Find and update Insensors
     const sensorDoc = await Insensors.findOne({
-      hardwareId: tankhardwareId,
+      tankhardwareId: tankhardwareId,
       connected_to: hardwareId
     });
-
+    
     if (!sensorDoc) {
       console.warn("⚠️ No Insensors doc found for LoRa update:", { tankhardwareId, connected_to: hardwareId });
-
-      // Optional fallback update only by hardwareId
-      const fallbackDoc = await Insensors.findOne({ hardwareId: tankhardwareId });
+    
+      const fallbackDoc = await Insensors.findOne({ tankhardwareId: tankhardwareId });
       if (fallbackDoc) {
         await Insensors.updateOne({ _id: fallbackDoc._id }, { $set: updateFields });
-        console.log("⚠️ Fallback Insensors updated by hardwareId:", fallbackDoc._id);
+        console.log("⚠️ Fallback Insensors updated by tankhardwareId:", fallbackDoc._id);
       }
     } else {
       await Insensors.updateOne({ _id: sensorDoc._id }, { $set: updateFields });
       console.log("✅ Insensors LoRa status updated:", sensorDoc._id);
     }
-
+    
     return reply.send({
       status_code: 200,
       message: isLoraConnected ? "LoRa connected" : "LoRa not connected",
@@ -823,6 +832,7 @@ exports.getByHardwareAndTankId = async (req, reply) => {
 
 
 
+
 exports.getByHardwareAndTankIdSupport = async (req, reply) => {
   try {
     const { hardwareId, tankhardwareId } = req.params;