Bluetooth Serial Connection With Windows 10 Recently I have been using a HC 05 Bluetooth module connected to an Arduino and have found it incredibly useful. You can easily connect it to an Arduino serial port and use Bluetooth to communicate with the Arduino as if it were connected through serial USB to a computer.

• Connect your serial devices to the newer computer equipment needing a serial connection that supports USB. 12 inch RS232 Serial Adapter for Desktop or Laptop. Handles full modem control signals and hardware/software flow. Installed as Windows COM port – Port assignment can be changed. 10kV Surge Protection on serial port connection.
• I am trying to console in my Windows 10 laptop to a Cisco 2651 Router in my home lab. I am using Putty to connect. My port settings under device manager signifies COM4. I have changed the port settings from COM1 to COM4 in putty (serial) and I.

I'm using an embedded device (bare metal program running on it) which is connected via USB and appears as serial interface on an connected host PC. This works perfectly with all tested Linux variants and all Windows up to Win 7 (Win 8.x never was used and tested). Unfortunately with Windows 10 there are larger problems: COM port can't be opened easily (means several retries are necessary) and sometimes an existing connection stops working.

The funny thing is: opening of the COM port includes calls to SetCommState() and GetCommState() where SetCommState() fails - also when it is used with exactly the same parameters like they are returned from GetCommState(). Repeating this procedure several times then is successful, latest after 10 retries SetCommState() works. So to clarify this: I call SetCommState() with exactly these parameters GetCommState() returned - and SetCommState() complains about invalid parameters!

On host PC an INF file is used which does nothing more than declaring own VID/PID (which fits to the embedded device) but then points to Windows-internal driver usbser.sys:

So: are there any important changes in Windows 10 related to serial drivers/serial interface/INF driver definition files? Anything that needs to be changed in INF file/USB implementation of the device?

Thanks!

The latest PuTTY version can be downloaded here:
http://www.chiark.greenend.org.uk/~sgtatham/putty/download.html

Windows Vista and Windows 7 only support the private edition of HyperTerminal. Windows 7 does not even ship with HyperTerminal. The private edition is NOT FREE for commercial use. Its license requires you purchase the application if used commercially, with the cost of the application being US$59.99, as listed on Hilgraeve’s website.

Windows 10 Serial Connection Solaris

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.
6. Select the Serial category from the menu on the left.
7. Make sure all of the settings are correct (the settings in the screenshot are what I used for my session, yours could look different depending on what you’re connecting to).
8. Select the Open button to start the session.

Your connection should now be fully functional.

If you find yourself using PuTTY quite extensively, you could save settings to different profiles for fast future usage. To create a profile for your settings:

1. Make sure you have the settings you require.
2. Enter a profile name under Saved Sessions.
3. Click the Save button.

Putty Serial Connection Windows 10

On your next PuTTY session, you can load your profile by selecting it from the list and clicking the Load button.

Logging is also a great feature that PuTTY provides. It lets you output your entire session to a log file. To enable logging, follow these steps before you open your connection:

1. Select Logging from the category list on the left.
2. Choose your desired logging method (All session output, printable output, etc…)
3. Enter a file name.
4. Select the file handling settings.
5. Open your connection.

13 Comments on Using PuTTY for serial COM connections (HyperTerminal replacement)

1. Hello,
   Your info is very helpful.
   Thanks.

   Bam

2. my serial putty configuration to an ubuntu system has wrong output: e.g. ýûþþüÌþüis as keyboardoutput. Is there anything to change to get readable output ?

   • Try differents baud rates.

3. SimpleTerm Gold – Stater Lite
   is a free alternative and is much easier for COM port or RS232, TTL based development work.

4. thanks for the info
   I am trying to program a bluetooth adaptar using Putty, having done the configuration as above, i couldn’t get any response(after writing the command(using Attention (AT) command)

5. This is great stuff. Not quite putty in my hands tho’. I went to full screen but had no idea how to get out of it. I tried right click – nothing, esc – also nothing

6. Thanks for such a useful information. I have putty software long back but i don’t know how to use thanks for information.

7. Thx, it’s useful and you made it easy :)

8. Doesn’t allow me to type anything.
   The black window opens, green cursor flashes and that’s it.
   Doesn’t accept any keyboard input. (Yes, the keyboard works)

   • How do I edit text from serial SLABS CP2104 of Option Globesurfer 3.
     I need to reset to factory and I know how to but I cannot get the text editor to work

9. Thanks for the info! Wasn’t working at first but I was testing the wrong COM ports.

10. thank you for the info , I am using Putty serial with a sipex SP3232ECP ,after connecting my cart via vpga , i open my putty connexion but i receive error messages .

11. my serial monitor does not response to the keyboard , the cursor standstill with no any response to the key board