diff --git a/data.db b/data.db
index 3027c91..7ab0cfc 100644
Binary files a/data.db and b/data.db differ
diff --git a/migrations/001-init.sql b/migrations/001-init.sql
index 0d1c201..da9ecae 100644
--- a/migrations/001-init.sql
+++ b/migrations/001-init.sql
@@ -39,6 +39,21 @@ CREATE TABLE IF NOT EXISTS "display_values" (
 	FOREIGN KEY("slave_id") REFERENCES modbus_slaves("id") ON DELETE CASCADE
 );
 
+-- CREATE TABLE IF NOT EXISTS "modbus_log" (
+-- 	"id" INTEGER,
+-- 	"date" DATE NOT NULL,
+-- 	"slave_id" INTEGER NOT NULL,
+	
+-- 	-- JSON Format: 
+-- 	-- {
+-- 	-- 	graph: [{ reg_addr: 1 value: 4 }],
+-- 	-- 	display_values: [{ reg_addr: 1, name: "CV1" }]
+-- 	-- }
+-- 	"data" TEXT NOT NULL,
+-- 	PRIMARY KEY("id"),
+-- 	FOREIGN KEY("slave_id") REFERENCES modbus_slaves("id") ON DELETE CASCADE
+-- )
+
 INSERT INTO "modbus_slaves" (
 	"id", "name", "g_display_reg_addr", "g_display_reg_format", "g_y_label", "is_logging"
 ) VALUES
diff --git a/public/index.html b/public/index.html
index e1c06ac..3fc467e 100644
--- a/public/index.html
+++ b/public/index.html
@@ -28,30 +28,35 @@
             <div class="border-r min-w-[256px] p-2.5 pt-5">
               <div class="flex flex-col space-y-1">
                 <span class="italic text-sm">Devices:</span>
-                <span x-show="devices.length === 0" class="text-gray-500 text-sm text-center block">No devices added.</span>
+                <span x-show="devices.length === 0" class="text-gray-500 text-sm text-center block"
+                  >No devices added.</span
+                >
                 <div class="flex flex-col max-h-[520px] overflow-y-auto space-y-2">
                   <template x-for="device in devices">
-                    <button @click="selectDevice(device)" :class="{'bg-gray-100': selectedDevice?.id === device.id}" class="w-full select-none border px-2.5 py-3 text-left rounded-sm hover:bg-gray-100 cursor-pointer">
+                    <button
+                      @click="selectDevice(device)"
+                      :class="{'bg-gray-100': selectedDevice?.id === device.id}"
+                      class="w-full select-none border px-2.5 py-3 text-left rounded-sm hover:bg-gray-100 cursor-pointer"
+                    >
                       <span x-text="device.name" class="text-md font-bold"></span>
                     </button>
                   </template>
                 </div>
-                <button class="w-full text-center border-2 border-dashed rounded-sm hover:bg-gray-50 cursor-pointer text-left">
+                <button class="w-full text-center border-2 border-dashed rounded-sm hover:bg-gray-50 cursor-pointer">
                   <span class="text-4xl text-gray-400 select-none">+</span>
                 </button>
               </div>
               <hr class="my-4" />
               <div>
-                  <span class="italic text-sm">Connection:</span>
-                  <div class="flex flex-col mt-1.5">
-                    <span class="text-sm">Status:
-                      <b x-show="$store.app.is_opened" class="text-green-700">Opened</b>
-                      <b x-show="!$store.app.is_opened" class="text-red-700">Closed</b>
-                    </span>
-                    <a class="text-sm" @click="$store.app.setPage('configuration')" href="#">
-                      Reconfigurate
-                    </a>
-                  </div>
+                <span class="italic text-sm">Connection:</span>
+                <div class="flex flex-col mt-1.5">
+                  <span class="text-sm"
+                    >Status:
+                    <b x-show="$store.app.is_opened" class="text-green-700">Opened</b>
+                    <b x-show="!$store.app.is_opened" class="text-red-700">Closed</b>
+                  </span>
+                  <a class="text-sm" @click="$store.app.setPage('configuration')" href="#"> Reconfigurate </a>
+                </div>
               </div>
             </div>
             <div class="flex-auto pl-2">
@@ -60,7 +65,12 @@
                   <h2 x-text="selectedDevice?.name" class="font-bold text-3xl my-2"></h2>
                   <div>
                     <a href="#">Edit</a>
-                    <a @click="$store.confirmDialog.open('Remove device', `Delete ${selectedDevice.name}? All logs will be cleared.`, removeDevice, selectedDevice.id)" class="text-red-500" href="#">Delete</a>
+                    <a
+                      @click="$store.confirmDialog.open('Remove device', `Delete ${selectedDevice.name}? All logs will be cleared.`, removeDevice, selectedDevice.id)"
+                      class="text-red-500"
+                      href="#"
+                      >Delete</a
+                    >
                   </div>
                 </div>
                 <div class="mt-4">
@@ -101,7 +111,7 @@
                     <option value="RTU">RTU</option>
                   </select>
                 </div>
-  
+
                 <div x-show="$store.app.config.mb_connection_type === 'TCP'" class="flex flex-col space-y-3">
                   <div>
                     <label for="tcp_ip">IP</label>
@@ -114,7 +124,7 @@
                       x-bind:required="$store.app.config.mb_connection_type === 'TCP'"
                     />
                   </div>
-  
+
                   <div>
                     <label for="rtu_port">Port</label>
                     <input
@@ -127,7 +137,7 @@
                     />
                   </div>
                 </div>
-  
+
                 <div x-show="$store.app.config.mb_connection_type === 'RTU'" class="flex flex-col space-y-3">
                   <div>
                     <label for="rtu_path">Path</label>
@@ -140,7 +150,7 @@
                       x-bind:required="$store.app.config.mb_connection_type === 'RTU'"
                     />
                   </div>
-  
+
                   <div>
                     <label for="rtu_baud">Baud</label>
                     <select
@@ -157,7 +167,7 @@
                       <option value="1200">1200</option>
                     </select>
                   </div>
-  
+
                   <div>
                     <label for="rtu_parity">Parity</label>
                     <select
@@ -171,7 +181,7 @@
                       <option value="none">none</option>
                     </select>
                   </div>
-  
+
                   <div>
                     <label for="rtu_data_bits">Data bits</label>
                     <select
@@ -186,7 +196,7 @@
                       <option value="5">5</option>
                     </select>
                   </div>
-  
+
                   <div>
                     <label for="rtu_stop_bits">Stop bits</label>
                     <select
@@ -201,7 +211,7 @@
                   </div>
                 </div>
               </div>
-  
+
               <div class="mt-2">
                 <label for="rtu_path">Log Interval (ms)</label>
                 <input
@@ -213,7 +223,7 @@
                   required
                 />
               </div>
-  
+
               <div class="mt-3 flex flex-row justify-between items-center">
                 <div class="mr-1">
                   <button
@@ -285,15 +295,25 @@
         </main>
       </template>
 
+      <!-- Confirm dialog -->
       <div x-show="$store.confirmDialog.isOpen" class="backdrop z-50">
-        <div role="dialog" @click.away="$store.confirmDialog.close()" class="px-4 py-3.5 ml-auto mr-auto mt-20 bg-white max-w-md border rounded-sm">
+        <div
+          role="dialog"
+          @click.away="$store.confirmDialog.close()"
+          class="px-4 py-3.5 ml-auto mr-auto mt-20 bg-white max-w-md border rounded-sm"
+        >
           <div class="flex justify-between items-center">
             <h2 x-text="$store.confirmDialog.labels.title" class="font-bold text-lg"></h2>
             <button @click="$store.confirmDialog.close()" aria-label="Close">
-              <svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24"><path fill="currentColor" d="M6.4 19L5 17.6l5.6-5.6L5 6.4L6.4 5l5.6 5.6L17.6 5L19 6.4L13.4 12l5.6 5.6l-1.4 1.4l-5.6-5.6L6.4 19Z"/></svg>
+              <svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24">
+                <path
+                  fill="currentColor"
+                  d="M6.4 19L5 17.6l5.6-5.6L5 6.4L6.4 5l5.6 5.6L17.6 5L19 6.4L13.4 12l5.6 5.6l-1.4 1.4l-5.6-5.6L6.4 19Z"
+                />
+              </svg>
             </button>
           </div>
-          <hr>
+          <hr />
           <p x-text="$store.confirmDialog.labels.body"></p>
           <div class="mt-4 flex justify-end space-x-2">
             <button @click="$store.confirmDialog.confirm()" class="btn">Confirm</button>
diff --git a/public/js/app.js b/public/js/app.js
index 157ff87..b3784d1 100644
--- a/public/js/app.js
+++ b/public/js/app.js
@@ -4,13 +4,7 @@ import api from "./api.js";
 import * as utils from "./utils/index.js";
 
 const pages = ["loading", "monitoring", "configuration", "404"];
-let graphData = [];
-const t = new Date();
-
-for (var i = 10; i >= 0; i--) {
-  var x = new Date(t.getTime() - i * 1000);
-  graphData.push([x, Math.random()]);
-}
+let graphData = [[0, 0]];
 
 document.addEventListener("alpine:init", async () => {
   Alpine.store("app", {
@@ -31,7 +25,7 @@ document.addEventListener("alpine:init", async () => {
     error: null,
     async init() {
       try {
-        const connStatusEventSource = new EventSource('/api/modbus/status');
+        const connStatusEventSource = new EventSource("/api/modbus/status");
         const { config } = await api.get("/app/config");
         const { is_configured } = await api.get("/app/is_configured");
 
@@ -39,7 +33,7 @@ document.addEventListener("alpine:init", async () => {
 
         if (config) this.config = config;
         if (is_configured) {
-          connStatusEventSource.onmessage = (e) => (this.is_opened = e.data === 'true');
+          connStatusEventSource.onmessage = (e) => (this.is_opened = e.data === "true");
           await utils.wait(500);
           this.currentPage = "monitoring";
           return;
@@ -63,28 +57,28 @@ document.addEventListener("alpine:init", async () => {
     },
   });
 
-  Alpine.data('monitoringPage', () => ({
+  Alpine.data("monitoringPage", () => ({
     selectedDevice: null,
     devices: [],
     async init() {
       try {
-        this.$store.app.currentPage = 'loading'
+        this.$store.app.currentPage = "loading";
         var g = new Dygraph(document.getElementById("div_g"), graphData, {
           drawPoints: false,
           showRoller: false,
-          ylabel: 'Y Label',
+          ylabel: "Y Label",
           valueRange: [0.0, 1.8],
           //labels: ["Time", "Random"],
         });
-        this.devices = await api.get('/modbus/devices');
+        this.devices = await api.get("/modbus/devices");
         window.intervalId = setInterval(() => {
           graphData.push([new Date(), Math.random()]);
-          g.updateOptions({ file: graphData })
-        }, 500)
+          g.updateOptions({ file: graphData });
+        }, 500);
       } catch (error) {
         this.$store.app.error = error;
       } finally {
-        this.$store.app.currentPage = 'monitoring'
+        this.$store.app.currentPage = "monitoring";
       }
     },
     selectDevice(device) {
@@ -95,13 +89,13 @@ document.addEventListener("alpine:init", async () => {
     async removeDevice(id, ctx) {
       try {
         //await api.post('/modbus/remove_device', { id });
-        this.devices = _this.devices.filter(d => d.id != id);
+        this.devices = _this.devices.filter((d) => d.id != id);
         this.selectedDevice = null;
       } catch (error) {
-        console.error('Error while removing device.', error)
+        console.error("Error while removing device.", error);
       }
-    }
-  }))
+    },
+  }));
 
   Alpine.data("configAppPage", () => ({
     selectedConnectionType: "TCP",
@@ -137,12 +131,12 @@ document.addEventListener("alpine:init", async () => {
   Alpine.store("confirmDialog", {
     isOpen: false,
     labels: {
-      title: 'Confirm dialog',
-      body: 'Are you sure you want to perform this action?',
+      title: "Confirm dialog",
+      body: "Are you sure you want to perform this action?",
     },
     cb: {
       fn: null,
-      args: []
+      args: [],
     },
     open(title, body, cb, ...args) {
       this.isOpen = true;
@@ -156,6 +150,6 @@ document.addEventListener("alpine:init", async () => {
     },
     close() {
       this.isOpen = false;
-    }
-  })
+    },
+  });
 });