UI is laggy when using serial communication - vb.net

Question

Good day!
I want to read data from serial port. The data can be read every 2 secs and save it to a database, and luckily did it. I used a datagridview to display and save it. But it seems very laggy. I must wait for a few seconds to be able to click another button.
Are there other ways on how to do this?
Any help would do. Thanks!
Imports System.Data.OleDb
Public Class PICtoVB[enter image description here][1]
Dim connString As String = "Provider=Microsoft.ACE.OLEDB.12.0; Data Source=C:\Users\Recto D Sanchez Jr\Desktop\Datalogger GUI\test\test\bin\Debug\database1.accdb"
Dim MyConn As OleDbConnection
Dim da As OleDbDataAdapter
Dim ds As DataSet
Dim tables As DataTableCollection
Dim source1 As New BindingSource
Dim timerval As Integer = 0
Private Sub btnconnect_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnconnect.Click
btnconnect.Enabled = False
btnread.Enabled = True
btndisconnect.Enabled = True
SerialPort1.Open()
Timer1.Enabled = True
End Sub
Private Sub btndisconnect_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btndisconnect.Click
btndisconnect.Enabled = False
btnread.Enabled = False
btnconnect.Enabled = True
Timer1.Enabled = False
SerialPort1.Close()
End Sub
Private Sub Timer1_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Timer1.Tick
timerval = timerval + 1
Dim serialdata1 As String
Dim serialdata2 As String
Dim serialdata3 As String
Dim serialdata4 As String
Try
serialdata1 = SerialPort1.ReadLine.ToString
serialdata2 = SerialPort1.ReadLine.ToString
serialdata3 = SerialPort1.ReadLine.ToString
serialdata4 = SerialPort1.ReadLine.ToString
dgvdata.Rows.Add(serialdata1, serialdata2, serialdata3, serialdata4)
DATALOGBindingSource1.AddNew()
DATETextBox.Text = serialdata1
TIMETextBox.Text = serialdata2
TEMP__C_TextBox.Text = serialdata3
RH____TextBox.Text = serialdata4
DATALOGBindingSource1.EndEdit()
DATALOGTableAdapter1.Update(Database1DataSet1.DATALOG)
Catch ex As Exception
End Try
End Sub

Answer 1

You're reading data from the SerialPort on the UI thread, which means that it is too busy to maintain the UI, hence the UI freezing for periods. Generally speaking, you handle the DataReceived event of the SerialPort and read data there. That event handler is executed on a secondary thread, which means that you can read and manipulate data as much as you want without affecting the UI. You can't update the UI from there though, so once you have processed the data and are ready to display it, you need to marshal a method call to the UI thread and do the updating there. That's a topic you can find lots of examples for.