jesus christ the serial port in sharp is so clunky

Datasheet.cs

@@ -3,7 +3,9 @@ using System.Collections.Generic;
 using System.ComponentModel;
 using System.Data;
 using System.Drawing;
+using System.IO.Ports;
 using System.Linq;
+using System.Runtime.Remoting.Messaging;
 using System.Text;
 using System.Threading.Tasks;
 using System.Windows.Forms;
@@ -12,31 +14,86 @@ namespace Gidrolock_Modbus_Scanner
 {
     public partial class Datasheet : Form
     {
+        int timeout = 3000;
         int pollDelay = 250; // delay between each entry poll, ms
+        byte slaveID;
         Device device = App.device;
-        public Datasheet()
+        List<Entry> entries;
+        SerialPort port = App.port;
+        public Datasheet(byte slaveID)
         {
+            this.slaveID = slaveID;
+            entries = device.entries;
+
             InitializeComponent();
-            listView1.AllowColumnReorder = true;
-            listView1.CheckBoxes = true;
-            listView1.FullRowSelect = true;
-            listView1.GridLines = true;
 
-            listView1.Columns.Add("#", -2, HorizontalAlignment.Left);
-            listView1.Columns.Add("Name", -2, HorizontalAlignment.Left);
-            listView1.Columns.Add("Value", -2, HorizontalAlignment.Left);
-            listView1.Columns.Add("Address", -2, HorizontalAlignment.Left);
+            DGV_Device.SelectionMode = DataGridViewSelectionMode.FullRowSelect;
+            DGV_Device.MultiSelect = false;
+            DGV_Device.AutoSizeRowsMode = DataGridViewAutoSizeRowsMode.DisplayedCellsExceptHeaders;
+            DGV_Device.AutoSizeColumnsMode = DataGridViewAutoSizeColumnsMode.Fill;
 
+            DGV_Device.Columns.Add("#", "#");
+            DGV_Device.Columns[0].FillWeight = 20;
+            DGV_Device.Columns.Add("Name", "Имя");
+            DGV_Device.Columns[1].FillWeight = 40;
+            DGV_Device.Columns.Add("Value", "Значение");
+            DGV_Device.Columns[2].FillWeight = 60;
+            DGV_Device.Columns.Add("Address", "Адрес");
+            DGV_Device.Columns[3].FillWeight = 30;
+            DGV_Device.Columns.Add(new DataGridViewCheckBoxColumn());
+            DGV_Device.Columns[4].Name = "Опрос";
+            DGV_Device.Columns[4].FillWeight = 20;
 
-            for (int i = 0; i < device.entries.Count; i++)
+            for (int i = 0; i < entries.Count; i++)
             {
-                ListViewItem item = new ListViewItem(i.ToString());
-                item.SubItems.Add(device.entries[i].name);
-                item.SubItems.Add(" ");
-                item.SubItems.Add(device.entries[i].address.ToString());
+                DGV_Device.Rows.Add(i.ToString(), entries[i].name, "", entries[i].address);
+            }
+            Task.Delay(1000).ContinueWith(_ => AutoPollAsync());
+        }
 
-                listView1.Items.Add(item);
+        public async Task<bool> AutoPollAsync()
+        {
+            port.Open();
+            while (true)
+            {
+                for (int i = 0; i < entries.Count; i++)
+                {
+                    if ((bool)DGV_Device.Rows[i].Cells[4].Value)
+                    {
+                        DGV_Device.Rows[i].Cells[2].Value = await PollForEntry(entries[i]);
+                        await Task.Delay(pollDelay);
+                    }
+                }
+            }
+        }
+
+        public async Task<string> PollForEntry(Entry entry)
+        {
+            byte[] result = new byte[] { 0xFF };
+            try
+            {
+                await Modbus.ReadRegAsync(port, slaveID, (FunctionCode)entry.registerType, entry.address, entry.length);
+                var task = Task.Delay(10).ContinueWith(_ =>
+                {
+                    result = new byte[port.BytesToRead];
+                    port.Read(result, 0, port.BytesToRead);
+                });
+
+                if (await Task.WhenAny(Task.Delay(timeout + 10), task) == task)
+                {
+                    if (result.Length > 5)
+                    {
+                        return Modbus.ByteArrayToString(result);
+                    }
+                    else return "N/A";
+                }
+                else return "N/A";
+            }
+            catch (Exception err)
+            {
+                MessageBox.Show(err.Message);
+                return "N/A";
             }
         }
     }
-}
+}