When you restart your computer, COM port setting revert to the default value?
You can change them in Device Manager or at the a command prompt, but they are not retains after a restart?
If you Open a CMD prompt and type MODE COM1:, you receive a display similar to:
Status for device COM1: ----------------------- Baud: 1200 Parity: None Data Bits: 7 Stop Bits: 1 Timeout: OFF XON/XOFF: OFF CTS handshaking: OFF DSR handshaking: OFF DSR sensitivity: OFF DTR circuit: ON RTS circuit: ONIn Microsoft Windows 2000, COM port settings for command functions are maintained only for the active Windows session. Custom settings are discarded at shutdown.
To workaround this feature, create a Minimized shortcut in your startup folder. If you wanted COM1 to be
Baud rate=9600; Parity=None; Data Bits=8; Stop Bits=1
set the shortcut target to:
C:\winnt\system32\mode.com com1: 9600,n,8,1