diff --git a/data.db b/data.db
index 7e6c153..c7fe9ac 100644
Binary files a/data.db and b/data.db differ
diff --git a/middlewares/validate-body.middleware.js b/middlewares/validate-body.middleware.js
index 46641ba..8828363 100644
--- a/middlewares/validate-body.middleware.js
+++ b/middlewares/validate-body.middleware.js
@@ -13,9 +13,12 @@ export function validateBodyMiddleware(schema) {
       await schema.validate(req.body);
       next();
     } catch (error) {
-      return res.status(400).json({ error: {
-        message: error.errors[0]
-      }});
+      return res.status(400).json({
+        error: {
+          status: 400,
+          message: error.errors[0],
+        },
+      });
     }
   };
 }
diff --git a/migrations/001-init.sql b/migrations/001-init.sql
index 363eac8..beee752 100644
--- a/migrations/001-init.sql
+++ b/migrations/001-init.sql
@@ -21,8 +21,8 @@ CREATE TABLE IF NOT EXISTS "app_config" (
 CREATE TABLE IF NOT EXISTS "modbus_slaves" (
 	"id" INTEGER CHECK (id >= 1 AND id <= 255),
 	"name" VARCHAR(256) NOT NULL,
-	"display_addr" INTEGER CHECK(display_addr >= 0 AND display_addr <= 65534),
-	-- "display_val_format" INTEGER CHECK IN(16, 32) NOT NULL,
+	"display_reg_addr" INTEGER CHECK(display_reg_addr >= 0 AND display_reg_addr <= 65534),
+	"display_reg_format" INTEGER CHECK(display_reg_format IN(16, 32)),
 	"is_logging" BOOLEAN NOT NULL,
 	PRIMARY KEY("id")
 );
diff --git a/public/css/dist.css b/public/css/dist.css
index 7ce2c2f..9b6b569 100644
--- a/public/css/dist.css
+++ b/public/css/dist.css
@@ -603,15 +603,21 @@ video {
   position: relative;
 }
 
-.m-2 {
-  margin: 0.5rem;
-}
-
 .mx-auto {
   margin-left: auto;
   margin-right: auto;
 }
 
+.my-4 {
+  margin-top: 1rem;
+  margin-bottom: 1rem;
+}
+
+.my-2 {
+  margin-top: 0.5rem;
+  margin-bottom: 0.5rem;
+}
+
 .ml-auto {
   margin-left: auto;
 }
@@ -640,6 +646,10 @@ video {
   margin-top: 1rem;
 }
 
+.mt-10 {
+  margin-top: 2.5rem;
+}
+
 .block {
   display: block;
 }
@@ -664,10 +674,18 @@ video {
   height: 5rem;
 }
 
+.h-full {
+  height: 100%;
+}
+
 .h-screen {
   height: 100vh;
 }
 
+.max-h-\[520px\] {
+  max-height: 520px;
+}
+
 .w-1 {
   width: 0.25rem;
 }
@@ -676,32 +694,12 @@ video {
   width: 5rem;
 }
 
-.w-48 {
-  width: 12rem;
-}
-
-.w-72 {
-  width: 18rem;
-}
-
 .w-full {
   width: 100%;
 }
 
-.w-24 {
-  width: 6rem;
-}
-
-.w-16 {
-  width: 4rem;
-}
-
-.w-12 {
-  width: 3rem;
-}
-
-.w-64 {
-  width: 16rem;
+.min-w-\[256px\] {
+  min-width: 256px;
 }
 
 .max-w-2xl {
@@ -712,6 +710,14 @@ video {
   max-width: 72rem;
 }
 
+.max-w-5xl {
+  max-width: 64rem;
+}
+
+.flex-1 {
+  flex: 1 1 0%;
+}
+
 .flex-auto {
   flex: 1 1 auto;
 }
@@ -730,6 +736,16 @@ video {
   animation: spin 1s linear infinite;
 }
 
+.cursor-pointer {
+  cursor: pointer;
+}
+
+.select-none {
+  -webkit-user-select: none;
+     -moz-user-select: none;
+          user-select: none;
+}
+
 .resize {
   resize: both;
 }
@@ -756,12 +772,22 @@ video {
   margin-left: calc(0.5rem * calc(1 - var(--tw-space-x-reverse)));
 }
 
+.space-y-2 > :not([hidden]) ~ :not([hidden]) {
+  --tw-space-y-reverse: 0;
+  margin-top: calc(0.5rem * calc(1 - var(--tw-space-y-reverse)));
+  margin-bottom: calc(0.5rem * var(--tw-space-y-reverse));
+}
+
 .space-y-3 > :not([hidden]) ~ :not([hidden]) {
   --tw-space-y-reverse: 0;
   margin-top: calc(0.75rem * calc(1 - var(--tw-space-y-reverse)));
   margin-bottom: calc(0.75rem * var(--tw-space-y-reverse));
 }
 
+.overflow-y-auto {
+  overflow-y: auto;
+}
+
 .rounded-sm {
   border-radius: 0.125rem;
 }
@@ -770,6 +796,14 @@ video {
   border-width: 1px;
 }
 
+.border-2 {
+  border-width: 2px;
+}
+
+.border-b {
+  border-bottom-width: 1px;
+}
+
 .border-l {
   border-left-width: 1px;
 }
@@ -778,6 +812,10 @@ video {
   border-right-width: 1px;
 }
 
+.border-dashed {
+  border-style: dashed;
+}
+
 .fill-blue-600 {
   fill: #2563eb;
 }
@@ -786,6 +824,14 @@ video {
   padding: 2.5rem;
 }
 
+.p-2 {
+  padding: 0.5rem;
+}
+
+.p-2\.5 {
+  padding: 0.625rem;
+}
+
 .p-20 {
   padding: 5rem;
 }
@@ -816,19 +862,13 @@ video {
   padding-right: 0.625rem;
 }
 
-.py-1 {
-  padding-top: 0.25rem;
-  padding-bottom: 0.25rem;
+.py-3 {
+  padding-top: 0.75rem;
+  padding-bottom: 0.75rem;
 }
 
-.py-1\.5 {
-  padding-top: 0.375rem;
-  padding-bottom: 0.375rem;
-}
-
-.py-8 {
-  padding-top: 2rem;
-  padding-bottom: 2rem;
+.pt-5 {
+  padding-top: 1.25rem;
 }
 
 .text-center {
@@ -845,6 +885,11 @@ video {
   line-height: 2.25rem;
 }
 
+.text-5xl {
+  font-size: 3rem;
+  line-height: 1;
+}
+
 .text-sm {
   font-size: 0.875rem;
   line-height: 1.25rem;
@@ -863,6 +908,11 @@ video {
   color: rgb(229 231 235 / var(--tw-text-opacity));
 }
 
+.text-gray-400 {
+  --tw-text-opacity: 1;
+  color: rgb(156 163 175 / var(--tw-text-opacity));
+}
+
 .text-gray-700 {
   --tw-text-opacity: 1;
   color: rgb(55 65 81 / var(--tw-text-opacity));
@@ -921,6 +971,11 @@ button:disabled {
   pointer-events: all !important;
 }
 
+.hover\:bg-gray-50:hover {
+  --tw-bg-opacity: 1;
+  background-color: rgb(249 250 251 / var(--tw-bg-opacity));
+}
+
 @media (prefers-color-scheme: dark) {
   .dark\:text-gray-600 {
     --tw-text-opacity: 1;
diff --git a/public/index.html b/public/index.html
index 53bad3d..f7909db 100644
--- a/public/index.html
+++ b/public/index.html
@@ -5,34 +5,55 @@
     <meta name="viewport" content="width=device-width, initial-scale=1.0" />
     <title>Modbus Logger App</title>
     <link rel="stylesheet" href="/css/dist.css" />
+    <script defer src="/js/dygraphs.min.js"></script>
     <script defer type="module" src="/js/app.js"></script>
   </head>
-  <body class="m-2">
+  <body>
     <!-- <div class="border p-4" x-data>
       <span>app state:</span>
       <pre x-text="JSON.stringify($store.app, undefined, 2)"></pre>
     </div> -->
-    
+
     <!-- Root element -->
-    <div x-data x-cloak class="mx-auto max-w-6xl m-2 py-8">
+    <div x-data x-cloak class="mx-auto max-w-5xl flex flex-col h-screen">
       <!-- Monitoring content -->
-      <main x-bind:hidden="$store.app.currentPage !== 'monitoring'">
+      <main class="flex-1" x-bind:hidden="$store.app.currentPage !== 'monitoring'">
         <!-- <div>
           <h1 class="text-3xl font-bold">Monitoring page</h1>
           <button @click="$store.app.setPage('configuration')" class="btn">Config</button>
         </div> -->
-        <div class="flex flex-auto flex-row h-screen space-x-2">
-          <div class="border-r w-64 p-4">
-            <div class="w-full border px-2.5 py-1.5 rounded-sm">
-              <h2 class="text-sm">Modbus slave #1</h2>
+        <div class="flex h-full flex-row space-x-2">
+          <div class="border-r min-w-[256px] p-2.5 pt-5">
+            <div class="flex flex-col space-y-2">
+              <span class="italic text-sm">Devices list:</span>
+              <div class="flex flex-col max-h-[520px] overflow-y-auto space-y-2">
+                <div class="w-full select-none border px-2.5 py-3 rounded-sm hover:bg-gray-50 cursor-pointer">
+                  <h2 class="text-md font-bold">Device #1</h2>
+                </div>
+                <div class="w-full select-none border px-2.5 py-3 rounded-sm hover:bg-gray-50 cursor-pointer">
+                  <h2 class="text-md font-bold">Device #2</h2>
+                </div>
+                <div class="w-full select-none border px-2.5 py-3 rounded-sm hover:bg-gray-50 cursor-pointer">
+                  <h2 class="text-md font-bold">Device #3</h2>
+                </div>
+              </div>
+              <div class="w-full text-center border-2 border-dashed rounded-sm hover:bg-gray-50 cursor-pointer">
+                <span class="text-5xl text-gray-400 select-none">+</span>
+              </div>
             </div>
+            <hr class="my-4" />
+            <div><span class="italic text-sm">Connection:</span><br /></div>
           </div>
-          <div class="w-full">
-            graph...
-          </div>
-          <div class="border-l w-48 p-4">
-
+          <div class="flex-auto">
+            <div class="pt-5 border-b">
+              <h2 class="font-bold text-3xl my-2">Device #1</h2>
+            </div>
+            <div class="mt-4">
+              <div id="div_g" style="width: 720px; height: 300px"></div>
+            </div>
+            <hr class="mt-10" />
           </div>
+          <!-- <div class="border-l"></div> -->
         </div>
       </main>
 
@@ -222,8 +243,7 @@
           <p>Refresh page to try again.</p>
           <br />
           <div class="border p-4">
-            <pre x-text="JSON.stringify($store.app.error, undefined, 2)" x-show="$store.app.error">
-            </pre>
+            <pre x-text="JSON.stringify($store.app.error, undefined, 2)" x-show="$store.app.error"></pre>
           </div>
         </div>
       </main>
diff --git a/public/js/app.js b/public/js/app.js
index 474cb10..9ce0a32 100644
--- a/public/js/app.js
+++ b/public/js/app.js
@@ -1,9 +1,33 @@
 // @ts-nocheck
 import "./alpine.js";
 import api from "./api.js";
-import * as utils from './utils/index.js'
+import * as utils from "./utils/index.js";
 
-const pages = ['loading', 'monitoring', 'configuration', '404']
+const pages = ["loading", "monitoring", "configuration", "404"];
+
+var data = [];
+var t = new Date();
+
+for (var i = 10; i >= 0; i--) {
+  var x = new Date(t.getTime() - i * 1000);
+  data.push([x, Math.random()]);
+}
+
+document.addEventListener("DOMContentLoaded", () => {
+  var g = new Dygraph(document.getElementById("div_g"), data, {
+    drawPoints: false,
+    showRoller: false,
+    // valueRange: [0.0, 6.8],
+    labels: ["Time", "Random"],
+  });
+
+  window.intervalId = setInterval(function () {
+    var x = new Date(); // current time
+    var y = Math.random();
+    data.push([x, y]);
+    g.updateOptions({ file: data });
+  }, 1000);
+});
 
 document.addEventListener("alpine:init", async () => {
   Alpine.store("app", {
@@ -31,7 +55,7 @@ document.addEventListener("alpine:init", async () => {
 
         if (config) this.config = config;
         if (is_configured) {
-          const devices = await api.get('/modbus/devices');
+          const devices = await api.get("/modbus/devices");
           this.devices = devices;
           this.currentPage = "monitoring";
           return;
@@ -39,19 +63,19 @@ document.addEventListener("alpine:init", async () => {
 
         this.currentPage = "configuration";
       } catch (error) {
-        this.currentPage = 'error'
+        this.currentPage = "error";
         this.error = error;
       }
     },
 
     setPage(page) {
       if (!pages.includes(page)) {
-        this.currentPage = '404'
+        this.currentPage = "404";
         return;
       }
 
       this.currentPage = page;
-    }
+    },
   });
 
   Alpine.data("configAppPage", () => ({
@@ -64,11 +88,17 @@ document.addEventListener("alpine:init", async () => {
         this.errorMessage = "";
         const data = { ...this.$store.app.config };
         const body = {
-          RTU: utils.objKeysExclude(data, ['mb_tcp_ip', 'mb_tcp_port']),
-          TCP: utils.objKeysExclude(data, ['mb_rtu_path', 'mb_rtu_baud', 'mb_rtu_parity', 'mb_rtu_data_bits', 'mb_rtu_stop_bits'])
-        }
+          RTU: utils.objKeysExclude(data, ["mb_tcp_ip", "mb_tcp_port"]),
+          TCP: utils.objKeysExclude(data, [
+            "mb_rtu_path",
+            "mb_rtu_baud",
+            "mb_rtu_parity",
+            "mb_rtu_data_bits",
+            "mb_rtu_stop_bits",
+          ]),
+        };
         await api.patch("/app/config", body[data.mb_connection_type]);
-        await api.post("/modbus/connect");  
+        await api.post("/modbus/connect");
         this.$store.app.currentPage = "monitoring";
       } catch (error) {
         this.errorMessage = `${error.message}`;
diff --git a/routes/api.router.js b/routes/api.router.js
index 36222bf..de6e288 100644
--- a/routes/api.router.js
+++ b/routes/api.router.js
@@ -1,5 +1,4 @@
 import express from "express";
-import modbusClient from "#root/config/modbus-client.config.js";
 
 /**
  * Validators
@@ -9,7 +8,7 @@ import { appConfigSchema } from "#root/validators/index.js";
 /**
  * Controllers
  */
-import { appController, modbusController } from '#root/controllers/index.js'
+import { appController, modbusController } from "#root/controllers/index.js";
 
 /**
  * Middlewares
@@ -22,7 +21,7 @@ apiRouter.get("/app/config", appController.getConfig);
 apiRouter.patch("/app/config", validateBodyMiddleware(appConfigSchema), appController.updateConfig);
 apiRouter.get("/app/is_configured", appController.isConfigured);
 
-apiRouter.get('/modbus/devices', modbusController.list);
+apiRouter.get("/modbus/devices", modbusController.list);
 apiRouter.post("/modbus/connect", modbusController.connect);
 apiRouter.post("/modbus/close", modbusController.close);
 apiRouter.get("/modbus/data_stream", modbusController.streamData);
diff --git a/scripts/db-init.script.js b/scripts/db-init.script.js
index 9335721..0e47190 100644
--- a/scripts/db-init.script.js
+++ b/scripts/db-init.script.js
@@ -1,11 +1,11 @@
-import db from '#root/config/database.config.js'
+import db from "#root/config/database.config.js";
 
 async function run() {
   try {
-    await db.migrate({ force: false })
-    console.log('Database initialized.');
+    await db.migrate({ force: false });
+    console.log("Database initialized.");
   } catch (error) {
-    throw error;
+    console.error(error);
   }
 }