diff --git a/src/controllers/tanksController.js b/src/controllers/tanksController.js
index 42534c66..ac584ff2 100644
--- a/src/controllers/tanksController.js
+++ b/src/controllers/tanksController.js
@@ -6150,27 +6150,24 @@ async function processIotData(hw_Id, data) {
 
       console.log(`🚰 Tank [${tankhardwareId}] - Level: ${tankHeight}, Calculated Water Level: ${waterLevel}`);
       if (tankHeight <= 0) {
-        const now = moment().tz('Asia/Kolkata');
-      
-        if (!existingTank.slave_status || existingTank.slave_status !== "not_working") {
-          if (!existingTank.slave_disconnected_time) {
-            // First time signal lost
-            const disconnectedTime = now.format('DD-MMM-YYYY - HH:mm:ss');
-            existingTank.slave_status = "signal_lost";
-            existingTank.slave_disconnected_time = disconnectedTime;
-            await existingTank.save();
-            console.log(`⚠️ Slave signal lost for tank [${tankhardwareId}] at ${disconnectedTime}`);
-          } else if (existingTank.slave_status === "signal_lost") {
-            const disconnectedMoment = moment(existingTank.slave_disconnected_time, 'DD-MMM-YYYY - HH:mm:ss');
-            const minutesDiff = now.diff(disconnectedMoment, 'minutes');
-            if (minutesDiff >= 5) {
-              existingTank.slave_status = "not_working";
-              await existingTank.save();
-              console.log(`❌ Slave marked as not_working for tank [${tankhardwareId}] after ${minutesDiff} minutes`);
-            } else {
-              console.log(`⏳ Slave still within grace period (${minutesDiff} min) for tank [${tankhardwareId}]`);
+        if (existingTank.slave_status !== "not_working") {
+          const disconnectedTime = moment().tz('Asia/Kolkata').format('DD-MMM-YYYY - HH:mm:ss');
+          existingTank.slave_status = "not_working";
+          existingTank.slave_disconnected_time = disconnectedTime;
+          await existingTank.save();
+          
+        for (const outputConnection of existingTank.connections.outputConnections) {
+          const linkedTank = await Tank.findOne({ customerId, tankName: outputConnection.outputConnections, tankLocation: outputConnection.output_type });
+          if (linkedTank) {
+            for (const inputConnection of linkedTank.connections.inputConnections) {
+              if (inputConnection.inputConnections === tank_name) {
+                inputConnection. slave_status = "not_working";
+                await linkedTank.save();
+              }
             }
           }
+        }
+          console.log(`⚠️ Slave disconnected for tank [${tankhardwareId}] at ${disconnectedTime}`);
         } else {
           console.log(`⏩ Slave already marked as not_working for tank [${tankhardwareId}], skipping update.`);
         }
@@ -6190,6 +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();
               }
             }
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: [