Use mode to display or set the serial communication ports on Windows.
Display available ports with their settings,
PS C:\> mode
Status for device COM3:
-----------------------
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: ON
Status for device COM4:
-----------------------
Baud: 19200
Parity: None
Data Bits: 8
Stop Bits: 1
Timeout: OFF
XON/XOFF: OFF
CTS handshaking: OFF
DSR handshaking: OFF
DSR sensitivity: OFF
DTR circuit: ON
RTS circuit: ON
Status for device CON:
----------------------
Lines: 53
Columns: 168
Keyboard rate: 31
Keyboard delay: 1
Code page: 437
Show help on mode
PS C:\> mode /?
Configures system devices.
Serial port: MODE COMm[:] [BAUD=b] [PARITY=p] [DATA=d] [STOP=s]
[to=on|off] [xon=on|off] [odsr=on|off]
[octs=on|off] [dtr=on|off|hs]
[rts=on|off|hs|tg] [idsr=on|off]
Device Status: MODE [device] [/STATUS]
Redirect printing: MODE LPTn[:]=COMm[:]
Select code page: MODE CON[:] CP SELECT=yyy
Code page status: MODE CON[:] CP [/STATUS]
Display mode: MODE CON[:] [COLS=c] [LINES=n]
Typematic rate: MODE CON[:] [RATE=r DELAY=d]Example for DMX on COM4
PS C:\> mode com4 baud=250000 data=8 stop=2 parity=n
Status for device COM4:
-----------------------
Baud: 250000
Parity: None
Data Bits: 8
Stop Bits: 2
Timeout: OFF
XON/XOFF: OFF
CTS handshaking: OFF
DSR handshaking: OFF
DSR sensitivity: OFF
DTR circuit: ON
RTS circuit: ON