How do I open a Serial Port in PuTTY?

How do I open a Serial Port in PuTTY?

To use PuTTY for your serial COM connections, follow these steps:

  1. Figure out the COM port you’ll be using.
  2. Run PuTTY.
  3. Switch the Connection Type to Serial.
  4. Edit the Serial Line to match the COM port you want to use.
  5. Edit the Speed to match the BAUD Rate you want to use.

How do I fix Unable to open Serial Port?

  1. Make sure that you have the necessary drivers.
  2. Verify that the port isn’t open/disconnect the cable.
  3. Stop the Windows Fax and Scan service.
  4. Disable the serial port in Device Manager.
  5. Try using a different cable.
  6. Restart the device.
  7. Reinstall the serial port driver.
  8. Make sure that the system is up to date.

Can not open COM port?

The error “Could not open serial port”, means that you do not have the correct comm port selected in Projects. Go to “Options” -> “Project Options” -> on the Communications Tab, choose the correct “Serial Port” under “Serial Options”.

How do I open a Serial Port?

To change the COM port number of a serial device in Device Manager, complete the following:

  1. Open the Device Manager by pressing the Windows Key + R.
  2. Expand the Ports (COM & LPT) section.
  3. Right-click the COM port and select Properties.
  4. Click the Port Settings tab and click Advanced.

Which COM port for PuTTY?

If multiple COM ports are in use you can unplug the controller and see which one disappears then plug it back in to confirm which COM port is needed for PuTTY. 115200.

How do I enable ports in Device Manager?

Launch Device Manager and go to Action > Add Legacy Hardware.

  1. Choose “Install the hardware that I manually select from a list”.
  2. Scroll down and select Ports (COM & LPT), then hit Next.
  3. Choose Communications Port.
  4. Hit Next and then Finish.
  5. The COM ports item will now display in Devices and Printers.

How do I check if a serial port is open?

To monitor your serial port activity, use these simple steps:

  1. Download and install Serial Port Tester.
  2. From the main menu select “Session > New session”.
  3. The “New monitoring session” window should now be displayed.
  4. Select “Start monitoring now” if you want to immediately start monitoring the ports.

How do I fix COM ports?


  1. Go to Windows Device manager > Multi-port serial adapters.
  2. Select the adapter and right click to open the menu.
  3. Click on the Properties link.
  4. Open the Ports Configuration tab.
  5. Click on the Port Setting button.
  6. Select the Port Number and click OK.
  7. Click OK to apply the changes.

How do I check if a Serial Port is open?