Jul 15, 2005  Solution 2: With the serial port in BIOS set to Auto, open Device Manager, select the Serial Port COM1, Properties, Port Settings tab, Advanced Button, chage the COM port number to COM2, reboot. Open Hotsynch Manager and change its serial port setting to match COM2. Solution 3: Purchase a Serial to USB converter to connect the Palm, Set the.

Jul 08, 2013  When I use Hyperterminal to test COM1, I get the message 'Unable to open COM1. Please check your port settings.' I've checked the BIOS of a working station and compare it to the non-working station. All information matches correctly. When I check COM1 property resources, the problem station looks identical to the good station, and not conflicts. When I try and use plink instead of PuTTY, I get the following errors: $ plink -serial COM9 -sercfg 115200,8,1,N,N Unable to open connection: Unable to open serial port But if I use the saved PuTTY session for COM9, it works!!plink -load COM9 help help connect Create connection help disconnect Close existing connection. However, I cannot use.

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I wanted to create a serial Connection in putty with my raspberry pi 3.I don't know what I have done wrong. But I get Always the same error message that my serial port can not be open.I'm sure that the Settings are Right. My PI has 2 usb ports. I tried both of them but None worked.Thanks!!

kikokiko

closed as off-topic by DavidPostill♦Dec 23 '18 at 17:36

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Putty Serial Port Commands

OK, Details;

I'm trying to communicate to the console ports on several Cisco switches and routers. I my computers do not have a 9pin Dconnector that will connect to a standard Cisco console cable, and the Cisco devices do not have USB.

Therefore, I purchased a Belkin USB to DB9 converter for serial connections. It's nice because I can see LEDs light up on it when it transfers data (link, TX, RX).

This has worked for a while. I'm using a home built computer using an AMD Athlon II comptuer with four USB ports comming off the motherboard. It's running XP OS.

Microsoft Windows XP

Professional

Version 2002

Service Pack 3

Computer:

AMD Athlon II X3 435

Processor

2.91GHz 1.75GB of RAM

This has been working for a year or so, and right in the middle of running it just stopped working and was hung. After that, when I use the Device Manager to list the 'Ports (COM & LPT)' it now only shows COM1 and LPT1.

I get the above error message when ever I use 'Putty' software to do the serial terminal emulation.

Not sure if it was my Belkin device, Computer, or OS.

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1) So I first tried rebooting the computer, with no success.

2) I tried connecting to another router with no change.

3) Next rebooted the orginal router, no change.

4) Rebooted the laptop, no change.

I searched the internet for this, and the best advice was to manually install the com port. I tried this, but it instead installed COM4 and COM5. I tried anyway, but uninstalled when done.

How does the COM3 port get built? Should it always show available, or does it build the interface when a device is plugged in?

Putty Cannot Open Serial Port With Inav

Well, I haven't messed with it over the weekend, tried again today, and now it's working when I plugged in the belkin USB to Serial DB9 connector. It recognized the device and gave a 'bong' and it appeared. Therefore I susspect that it is built when the device is plugged in, and torn down when it is disconnected. Not sure why it's now working..but now i don't trust when it may go down of back up. I'm sure there is a logical explaination, but not any help from the MS OS...as usual.

Maybe the Belkin device is flakey, but unlikely due to the number of times I unplugged and replugged...not sure.

Putty Can T Open Serial Port

I then grabbed a Laptop running Windows 7 and connected to it's USB port, and running putty software, and it started working.

Putty Serial Port Download

Then, in about 5 minutes, it hung up as well, and I could not see the COM3 Port.