diff --git a/src/controllers/tanksController.js b/src/controllers/tanksController.js
index 36580270..c498f76b 100644
--- a/src/controllers/tanksController.js
+++ b/src/controllers/tanksController.js
@@ -956,71 +956,44 @@ exports.calculateCapacity = async (req, reply) => {
   }
 };
 
+
 exports.IotDevice = async (req, reply) => {
   try {
     const { hardwareId, mode, tanks } = req.body;
 
-    // Find the existing IOttank document with the provided hardwareId
-    let ottank = await IotData.findOne({ hardwareId });
-
-    // If no existing document is found, create a new one
-    if (!ottank) {
-      ottank = new IotData({ hardwareId, mode, tanks: [], date: '', time: '' });
-    }
-
-    // Update the date and time of the IOttank document
+    // create a new tank document with the current date and time
     const currentDate = new Date();
-    ottank.date = currentDate.toISOString();
-    ottank.time = currentDate.toLocaleTimeString('en-IN', { hour12: false, timeZone: 'Asia/Kolkata' });
-
-    // Remove excess tank records for each tankhardwareId
-    for (const tank of ottank.tanks) {
-      if (tank.tankhardwareId === tank.tankhardwareId) {
-        const tankRecords = ottank.tanks.filter(t => t.tankhardwareId === tank.tankhardwareId);
-        if (tankRecords.length > 3) {
-          tankRecords.sort((a, b) => new Date(b.date) - new Date(a.date));
-          const excessRecords = tankRecords.slice(3);
-          ottank.tanks = ottank.tanks.filter(t => !excessRecords.includes(t));
-        }
-      }
-    }
-
-    // Iterate through the tanks received in the request
-    for (const tank of tanks) {
-      // Find the existing tank document with the provided tankhardwareId
-      const existingTank = ottank.tanks.find(t => t.tankhardwareId === tank.tankhardwareId);
-
-      if (existingTank) {
-        // Update the existing tank document
-        existingTank.tankHeight = tank.tankHeight;
-        existingTank.maxLevel = tank.maxLevel;
-        existingTank.minLevel = tank.minLevel;
-        existingTank.date = ottank.date;
-        existingTank.time = ottank.time;
-      } else {
-        // Create a new tank document and add it to the IOttank document
-        ottank.tanks.push({
-          tankhardwareId: tank.tankhardwareId,
-          tankHeight: tank.tankHeight,
-          maxLevel: tank.maxLevel,
-          minLevel: tank.minLevel,
-          date: ottank.date,
-          time: ottank.time
-        });
-      }
-    }
-
-    // Save the updated or new IOttank document to MongoDB
+    const date = currentDate.toISOString(); // save the date as an ISO string
+    const time = currentDate.toLocaleTimeString('en-IN', { hour12: false, timeZone: 'Asia/Kolkata' });
+
+    // Create an array of tank documents
+    const tankDocuments = tanks.map(tank => ({
+      tankhardwareId: tank.tankhardwareId,
+      tankHeight: tank.tankHeight,
+      maxLevel: tank.maxLevel,
+      minLevel: tank.minLevel,
+      date:date,
+      time:time
+    }));
+
+    // create a new IOttank document with the provided data
+    const ottank = new IotData({ hardwareId, mode, tanks: tankDocuments, date, time });
+
+    // save the document to MongoDB
     await ottank.save();
 
-    // Send the updated or new IOttank document
-    reply.code(200).send({ latestOttank: ottank });
+    // get the latest document sorted in descending order of date and time
+    const latestOttank = await IotData.findOne({ hardwareId }).sort({ date: -1, time: -1 });
+
+    // send the latest document
+    reply.code(200).send({ latestOttank });
   } catch (err) {
-    // Send an error response
+    // send an error response
     reply.code(500).send({ error: err.message });
   }
 };
 
+
 exports.getIotD = async(req, reply) => {
   try {
     await IotData.find({hardwareId: req.query.hardwareId})