diff --git a/controllers/modbus.controller.js b/controllers/modbus.controller.js
index c083bcb..9f34f9b 100644
--- a/controllers/modbus.controller.js
+++ b/controllers/modbus.controller.js
@@ -67,7 +67,7 @@ export const modbusController = {
   async list(req, res, next) {
     try {
       const slaves = await db.all(`
-          SELECT  ms.id AS id, ms.name AS name, g_display_reg_addr, g_display_reg_format, g_y_label, is_logging,
+          SELECT  ms.id AS id, ms.name AS name, g_display_reg_addr, g_display_reg_format, g_display_reg_type, g_y_label, is_logging,
           CASE
             WHEN COUNT(dv.id) = 0 THEN '[]'
             ELSE '[' || GROUP_CONCAT(
@@ -97,17 +97,18 @@ export const modbusController = {
    */
   async createDevice(req, res, next) {
     try {
-      const { id, name, g_display_reg_addr, g_display_reg_format, g_y_label, is_logging } = req.body;
+      const { id, name, g_display_reg_addr, g_display_reg_format, g_display_reg_type, g_y_label, is_logging } = req.body;
       await db.run(
         `INSERT INTO "modbus_slaves" (
                     "id", 
                     "name", 
                     "g_display_reg_addr", 
-                    "g_display_reg_format", 
+                    "g_display_reg_format",
+                    "g_display_reg_type",
                     "g_y_label", 
                     "is_logging") 
-                    VALUES (?, ?, ?, ?, ?, ?)`,
-        [id, name, g_display_reg_addr, g_display_reg_format, g_y_label, is_logging],
+                    VALUES (?, ?, ?, ?, ?, ?, ?)`,
+        [id, name, g_display_reg_addr, g_display_reg_format, g_display_reg_type, g_y_label, is_logging],
       );
       return res.status(200).json({ message: "Device created." });
     } catch (error) {
@@ -216,15 +217,14 @@ export const modbusController = {
       if (!device) 
         return res.status(404).json({ error: { message: "Device not found." } });
 
-      device.display_values = await db.all(`SELECT * FROM "display_values" WHERE slave_id = ?`, [slave_id]) 
-
       res.setHeader("Cache-Control", "no-cache");
       res.setHeader("Content-Type", "text/event-stream");
       res.setHeader("Connection", "keep-alive");
 
       const streamInterval = setInterval(async () => {
         try {
-          const data = await modbusService.readDataFromDevice(device, 'HR');
+          device.display_values = await db.all(`SELECT * FROM "display_values" WHERE slave_id = ?`, [slave_id]) 
+          const data = await modbusService.readDataFromDevice(device, device.g_display_reg_type);
           res.write("event: message\n");
           res.write(`data: ${JSON.stringify(data)}\n\n`);
         } catch (error) {
diff --git a/data.db b/data.db
index 4549151..436c841 100644
Binary files a/data.db and b/data.db differ
diff --git a/index.d.ts b/index.d.ts
index 93322e8..5e81d19 100644
--- a/index.d.ts
+++ b/index.d.ts
@@ -26,6 +26,7 @@ export type ModbusDevice = {
   name: string;
   g_display_reg_addr: number | null;
   g_display_reg_format: NumberType | null;
+  g_display_reg_type: "HR" | "IR";
   g_y_label: string | null;
   is_logging: boolean;
   display_values?: DisplayValue[]
diff --git a/migrations/001-init.sql b/migrations/001-init.sql
index 6c843b6..1cc312b 100644
--- a/migrations/001-init.sql
+++ b/migrations/001-init.sql
@@ -22,7 +22,7 @@ CREATE TABLE IF NOT EXISTS "modbus_slaves" (
 	"id" INTEGER CHECK (id >= 1 AND id <= 255),
 	"name" VARCHAR(256) NOT NULL,
 	"g_display_reg_addr" INTEGER CHECK(g_display_reg_addr >= 0 AND g_display_reg_addr <= 65534) DEFAULT NULL, 
-	"g_display_reg_type" VARCHAR(3) CHECK(g_display_reg_type, IN("HR", "IR")) DEFAULT "HR",
+	"g_display_reg_type" VARCHAR(3) CHECK(g_display_reg_type IN("HR", "IR")) DEFAULT "HR",
 	"g_display_reg_format" VARCHAR(5) CHECK(g_display_reg_format IN("UI16", "I16", "UI32", "I32", "FP32")) DEFAULT "UI16",
 	"g_y_label" VARCHAR(40) DEFAULT "Label",
 	"is_logging" BOOLEAN NOT NULL DEFAULT FALSE,
@@ -55,12 +55,12 @@ CREATE TABLE IF NOT EXISTS "display_values" (
 -- )
 
 INSERT INTO "modbus_slaves" (
-	"id", "name", "g_display_reg_addr", "g_display_reg_format", "g_y_label", "is_logging"
+	"id", "name", "g_display_reg_addr", "g_display_reg_type", "g_display_reg_format", "g_y_label", "is_logging"
 ) VALUES
-	(1, "Device #1", 0, "UI16", "Label 1", 1),
-	(2, "Device #2", 1, "UI32", "Label 2", 1),
-	(3, "Device #3", 3, "UI16", "Label 3", 0),
-	(4, "Device #4", NULL, NULL, "Label 4", 0);
+	(1, "Device #1", 0, "IR", "UI16", "Label 1", 1),
+	(2, "Device #2", 1, "IR", "UI32", "Label 2", 1),
+	(3, "Device #3", 3, "IR", "UI16", "Label 3", 0),
+	(4, "Device #4", NULL, NULL, NULL, "Label 4", 0);
 
 INSERT INTO "display_values" (
 	"id", "name", "slave_id", "reg_addr", "reg_format"
diff --git a/public/css/dist.css b/public/css/dist.css
index ac86915..d8092ab 100644
--- a/public/css/dist.css
+++ b/public/css/dist.css
@@ -698,10 +698,6 @@ video {
   margin-top: 1.5rem;
 }
 
-.mt-auto {
-  margin-top: auto;
-}
-
 .block {
   display: block;
 }
@@ -730,8 +726,8 @@ video {
   height: 5rem;
 }
 
-.h-\[720px\] {
-  height: 720px;
+.h-\[300px\] {
+  height: 300px;
 }
 
 .h-full {
@@ -742,10 +738,6 @@ video {
   height: 100vh;
 }
 
-.h-\[300px\] {
-  height: 300px;
-}
-
 .max-h-\[400px\] {
   max-height: 400px;
 }
diff --git a/public/index.html b/public/index.html
index de8fab7..20e279d 100644
--- a/public/index.html
+++ b/public/index.html
@@ -85,9 +85,16 @@
                               <label :for="$id('g_display_reg_addr')"><span class="text-red-500">*</span>Register address:</label>
                               <input x-model="data.g_display_reg_addr" :id="$id('g_display_reg_addr')" name="g_display_reg_addr" placeholder="1" type="number" min="0" max="65534" :required="graphView === 'new-value'" />
                             </div>
+                            <div>
+                              <label :for="$id('g_display_reg_type')"><span class="text-red-500">*</span>Registers type:</label>
+                              <select x-model="data.g_display_reg_type" :id="$id('g_display_reg_type')" name="g_display_reg_type" :required="graphView === 'new-value'">
+                                <option value="IR">Input Registers</option>
+                                <option value="HR">Holding Registers</option>
+                              </select>
+                            </div>
                             <div>
                               <label :for="$id('g_display_reg_format')"><span class="text-red-500">*</span>Format (type):</label>
-                              <select x-model="data.g_display_reg_format" :id="$id('g_display_reg_format')" name="g_display_reg_format">
+                              <select x-model="data.g_display_reg_format" :id="$id('g_display_reg_format')" name="g_display_reg_format" :required="graphView === 'new-value'">
                                 <option value="UI16">Unsigned Int 16</option>
                                 <option value="I16">Signed Int 16</option>
                                 <option value="UI32">Unsigned Int 32</option>
@@ -138,6 +145,7 @@
                 <div class="pt-5 border-b flex flex-wrap justify-between items-center pr-6">
                   <div class="mb-2">
                     <h2 x-text="selectedDevice?.name" class="font-bold text-3xl my-2 mr-2"></h2>
+                    <span>ID: <span x-text="selectedDevice?.id"></span></span>
                   </div>
                   <!-- Device create, delete buttons -->
                   <div>
@@ -162,8 +170,9 @@
                 <div x-show="!isLoading && selectedDevice?.g_display_reg_addr !== null" class="mt-4">
                   <div id="div_g" style="width: 720px; height: 300px"></div>
                   <div class="flex space-x-2 mt-2">
-                    <span>Register: <span x-text="selectedDevice?.g_display_reg_addr"></span></span>
-                    <span>Format: <span x-text="selectedDevice?.g_display_reg_format"></span></span>
+                    <span class="italic text-sm">Register: <span x-text="selectedDevice?.g_display_reg_addr"></span>&comma;</span>
+                    <span class="italic text-sm">Format: <span x-text="selectedDevice?.g_display_reg_format"></span>&comma;</span>
+                    <span class="italic text-sm">Register type: <span x-text="selectedDevice?.g_display_reg_type"></span></span>
                   </div>
                   <hr class="my-3" />
                 </div>
diff --git a/public/js/app.js b/public/js/app.js
index 65b76de..e0f7a46 100644
--- a/public/js/app.js
+++ b/public/js/app.js
@@ -68,6 +68,7 @@ document.addEventListener("alpine:init", async () => {
       name: "",
       g_display_reg_addr: null,
       g_display_reg_format: "UI16",
+      g_display_reg_type: 'IR',
       g_y_label: "",
       is_logging: false,
     },
@@ -76,6 +77,7 @@ document.addEventListener("alpine:init", async () => {
       this.data.name = "";
       this.data.g_display_reg_addr = null;
       this.data.g_display_reg_format = "UI16";
+      this.g_display_reg_type = 'IR';
       this.data.g_y_label = "";
       this.data.is_logging = false;
     },
diff --git a/validators/modbus-device.schema.js b/validators/modbus-device.schema.js
index bd40d83..f5f9507 100644
--- a/validators/modbus-device.schema.js
+++ b/validators/modbus-device.schema.js
@@ -5,6 +5,7 @@ export const modbusDeviceSchema = object({
   name: string().required(),
   g_display_reg_addr: number().min(0).max(65534).nullable(),
   g_display_reg_format: string().oneOf(["UI16", "I16", "UI32", "I32", "FP32"]).nullable(),
+  g_display_reg_type: string().oneOf(["HR", "IR"]).nullable(),
   g_y_label: string().max(40).nullable(),
   is_logging: boolean().required()
 });