diff --git a/src/controllers/tanksController.js b/src/controllers/tanksController.js
index 69f80fc9..ac584ff2 100644
--- a/src/controllers/tanksController.js
+++ b/src/controllers/tanksController.js
@@ -6134,7 +6134,9 @@ async function processIotData(hw_Id, data) {
     for (const tank of tanks) {
       const { Id: tankhardwareId, level: tankHeight } = tank;
       const existingTank = await Tank.findOne({ hardwareId: hw_Id, tankhardwareId });
-
+      console.log(hw_Id,"hw_Id")
+      console.log(tankhardwareId,"tankhardwareId")
+      console.log(existingTank,"existingTank")
       if (!existingTank) continue;
 
       const customerId = existingTank.customerId;
@@ -6148,38 +6150,30 @@ async function processIotData(hw_Id, data) {
 
       console.log(`🚰 Tank [${tankhardwareId}] - Level: ${tankHeight}, Calculated Water Level: ${waterLevel}`);
       if (tankHeight <= 0) {
-        const now = moment().tz('Asia/Kolkata');
-        const formattedNow = now.format('DD-MMM-YYYY - HH:mm:ss');
-      
         if (existingTank.slave_status !== "not_working") {
-          if (!existingTank.slave_disconnected_time) {
-            // First time signal is lost
-            existingTank.slave_status = "signal_lost";
-            existingTank.slave_disconnected_time = formattedNow;
-            await existingTank.save();
-            console.log(`⚠️ Slave signal lost for tank [${tankhardwareId}] at ${formattedNow}`);
-          } else if (existingTank.slave_status === "signal_lost") {
-            const disconnectedMoment = moment(existingTank.slave_disconnected_time, 'DD-MMM-YYYY - HH:mm:ss');
-            if (!disconnectedMoment.isValid()) {
-              console.error(`❌ Invalid slave_disconnected_time format for tank [${tankhardwareId}]`);
-            } else {
-              const minutesDiff = now.diff(disconnectedMoment, 'minutes');
-              console.log(`⏳ Minutes since disconnect for tank [${tankhardwareId}]: ${minutesDiff} min`);
-      
-              if (minutesDiff >= 5) {
-                existingTank.slave_status = "not_working";
-                await existingTank.save();
-                console.log(`❌ Slave marked as not_working for tank [${tankhardwareId}] after ${minutesDiff} minutes`);
-              } else {
-                console.log(`ℹ️ Still within 5-minute window for tank [${tankhardwareId}], no update yet`);
+          const disconnectedTime = moment().tz('Asia/Kolkata').format('DD-MMM-YYYY - HH:mm:ss');
+          existingTank.slave_status = "not_working";
+          existingTank.slave_disconnected_time = disconnectedTime;
+          await existingTank.save();
+          
+        for (const outputConnection of existingTank.connections.outputConnections) {
+          const linkedTank = await Tank.findOne({ customerId, tankName: outputConnection.outputConnections, tankLocation: outputConnection.output_type });
+          if (linkedTank) {
+            for (const inputConnection of linkedTank.connections.inputConnections) {
+              if (inputConnection.inputConnections === tank_name) {
+                inputConnection. slave_status = "not_working";
+                await linkedTank.save();
               }
             }
           }
+        }
+          console.log(`⚠️ Slave disconnected for tank [${tankhardwareId}] at ${disconnectedTime}`);
         } else {
-          console.log(`⏩ Slave already marked as not_working for tank [${tankhardwareId}], skipping update`);
+          console.log(`⏩ Slave already marked as not_working for tank [${tankhardwareId}], skipping update.`);
         }
       }
       
+      
 
       if (tankHeight > 0 && waterLevel >= 0) {
         existingTank.waterlevel = waterLevel;
@@ -6193,6 +6187,7 @@ async function processIotData(hw_Id, data) {
             for (const inputConnection of linkedTank.connections.inputConnections) {
               if (inputConnection.inputConnections === tank_name) {
                 inputConnection.water_level = waterLevel;
+                inputConnection. slave_status = "working";
                 await linkedTank.save();
               }
             }
@@ -7753,4 +7748,4 @@ exports.compareMeasuredHeight = async (req, reply) => {
     console.error("Error in compareMeasuredHeight:", err);
     reply.status(500).send({ message: err.message });
   }
-};
+};
\ No newline at end of file
diff --git a/src/models/tanks.js b/src/models/tanks.js
index 5627fa8f..28a56a70 100644
--- a/src/models/tanks.js
+++ b/src/models/tanks.js
@@ -89,7 +89,8 @@ const tanksSchema = new mongoose.Schema({
         startTime: { type: String, default: null },
         start_instance_id: { type: String, default: null },
         stopTime: { type: String, default: null },
-        waterlevelPercentage: { type: String, default: null } 
+        waterlevelPercentage: { type: String, default: null } ,
+        slave_status:{ type: String, default: "working" },
       }
     ],
     outputConnections: [