I get the value when I use serial command in Arduino compiler.
Have you verified that the Arduino is actually sending anything?
What I mean, is when I use arduino compiler and hit serial monitor, I get the temperature.
But when I ran the code you posted,
But the value from temp didn't change when I put heat on it.
If I understand it right, when I program arduino like "Serial.print"This is what it sends to serial port?
In my code showed above,
Set DTR and RTS.DtrEnable = True.RtsEnable = True
how can I do this?
s = SerialPort1.ReadLine()TextBox1.Text = TextBox1.Text + s + vbCrLf