Error while insert data Into table

[POKHRAJ Das]

Hi,
I am facing error while inserting data into table...
The below is my table structure..

==================
create table arduino (arvalue double(10,2));
======

Now when I am trying to insert data from vb.net it is throwing error..

"Excption: Thrown You have an error in sql syntax.
===========
But when manually I am trying to insert from mySQL workbench, it is working fine.

=============
Below is my sql syntax from vb.net.....

Dim readserialdata As String
Dim sqlquery As String
Dim cmd As New MySqlCommand
readserialdata = myport.ReadLine()
Label1.Text = readserialdata
sqlquery = "insert into tab1 values(" & Trim(readserialdata) & ")"
cmd = New MySqlCommand(sqlquery, cn)
cmd.ExecuteNonQuery()