I want to connect with my serial Port using PuTTY program, but it's not possible, when I ckick 'open' nothing happens. I only hear a 'Beep, Beep'. under a Windows 7 on MAC OS X with VirtualBox
Active3 months ago
Since I couldn't connect using the console cable directly, I installed a dhcp server temporarily, then I accesses the leased ip address to my HP Procurve switch, changed the IP into a static one and accessed the switch terminal through a telnet connection. Afterward I stopped the dhcp server since I don't really need it any more. Mar 26, 2017 COM port is visible only when the device is connected. When you unplug the USB connection, it is natural for the COM port to disappear. Coming to the Putty problem, you are right about it not being a TI issue. Nor is it an issue with PuTTY or windows. Have you selected the serial radio button from session menu before trying to open the COM port? I'm trying to establish a serial connection to a peripheral from my PC's RS-232 port. Pretty simple stuff, and I've had not trouble doing it with countless peripherals before. And yet when I configure PuTTY to the right baud rate, stop bits, etc. I'll type in '.IDN?' , press enter, and the unit won't reply.
darkZonedarkZone
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2 Answers
The first thing I'd do is make sure you can connect to your external device using the Host OS directly. Since you're on a Mac you can use screen from the command line (since you're using 9600 baud):
If that doesn't work then you're dead in the water.
Then make sure your host's serial port is exposed to your Virtual client. From your host Virtualbox settings you'll need to pass through your serial port (like here https://superuser.com/questions/436049/how-to-use-host-serial-port-from-guest-in-virtualbox).
In Putty then you should be able to connect to the COM port you passed through.
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ludwigmaceludwigmace
Had this problem and found the solution.Putty wont open a connection from the 'Serial' tab in the left column.Choose 'Session' instead and select the checkbox for Serial.
ExeonExeon
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Putty Will Not Open Serial Connection
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
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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.
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.
Putty Won't Open Serial Connection Video
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?
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 Won't Open Serial Connection
I then grabbed a Laptop running Windows 7 and connected to it's USB port, and running putty software, and it started working.
Serial Connection Putty
Then, in about 5 minutes, it hung up as well, and I could not see the COM3 Port.
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