diff --git a/src/controllers/tanksController.js b/src/controllers/tanksController.js
index 478555ad..f85b4aa1 100644
--- a/src/controllers/tanksController.js
+++ b/src/controllers/tanksController.js
@@ -6218,20 +6218,25 @@ async function processIotData(hw_Id, data) {
       if (tankHeight <= 0) {
         const now = moment().tz('Asia/Kolkata');
       
-        if (existingTank.slave_status === "working") {
+        if (
+          existingTank.slave_status !== "signal_lost1" &&
+          existingTank.slave_status !== "not_working"
+        ) {
           // First time signal is lost
           existingTank.slave_status = "signal_lost1";
-          existingTank.slave_signal_lost_time = now.format('DD-MMM-YYYY - HH:mm:ss');
-          await existingTank.save();
-          console.log(now.format('DD-MMM-YYYY - HH:mm:ss'),"in signal lost")
-          console.log(`⚠️ Signal lost for tank [${tankhardwareId}] at ${existingTank.slave_signal_lost_time}`);
       
+          if (!existingTank.slave_signal_lost_time) {
+            existingTank.slave_signal_lost_time = now.format('DD-MMM-YYYY - HH:mm:ss');
+            console.log(`⚠️ Signal lost for tank [${tankhardwareId}] at ${existingTank.slave_signal_lost_time}`);
+          }
+      
+          await existingTank.save();
         } else if (existingTank.slave_status === "signal_lost1") {
           const lostTime = moment(existingTank.slave_signal_lost_time, 'DD-MMM-YYYY - HH:mm:ss');
           const minutesElapsed = now.diff(lostTime, 'minutes');
-          console.log(now.format('DD-MMM-YYYY - HH:mm:ss'),"in  comparing signal lost")
+          console.log(`⏳ ${minutesElapsed} min since signal lost for tank [${tankhardwareId}]`);
+      
           if (minutesElapsed >= 15) {
-            console.log(now.format('DD-MMM-YYYY - HH:mm:ss'),"in not_working")
             existingTank.slave_status = "not_working";
             existingTank.slave_disconnected_time = now.format('DD-MMM-YYYY - HH:mm:ss');
             await existingTank.save();
@@ -6255,10 +6260,7 @@ async function processIotData(hw_Id, data) {
             }
       
             console.log(`❌ Slave marked as not_working for tank [${tankhardwareId}] at ${existingTank.slave_disconnected_time}`);
-          } else {
-            console.log(`⏳ Slave still in signal_lost for tank [${tankhardwareId}], waiting for 15 mins.`);
           }
-      
         } else {
           console.log(`⏩ Slave already marked as ${existingTank.slave_status} for tank [${tankhardwareId}], skipping update.`);
         }