Serial Ports Oracle VM VirtualBox supports the use of virtual serial ports in a virtual machine. Ever since the original IBM PC, personal computers have been equipped with one or two serial ports, also called COM ports by DOS and Windows. A virtual serial port can output data to files, named pipes, and physical serial ports. A VMware serial port can be added to a virtual machine in order to create devices such as modems etc. That are made available to the virtual machine itself.
Active2 years, 4 months ago
I am having a difficult time trying to access a serial port on VirtualBox. https://wheelsbrown750.weebly.com/blog/copy-cloner-for-windows-10. My Guest OS is Windows XP and the host environment is Linux Ubuntu 10.04.
The serial modem device works perfectly in Ubuntu. I can communicate with it via cutecom or just sending plain echo messages to it like so:
![Virtualbox Serial Port Mode Virtualbox Serial Port Mode](https://i.stack.imgur.com/iVcEm.png)
Ubuntu Settings and config
I have added my user account to the following group: dialout and have set the serial using the following command: sudo setserial /dev/ttyS2 but still no luck when trying to access it in my Guest OS.
Virtualbox Serial Port Setup
Heres the settings I use to configure the serial port in VirtualBox: https://wheelsbrown750.weebly.com/blog/8-ball-pool-hacked-apk.
I have tried all the different port modes even disconnected but still no luck. I have consulted the manual aswell but nothing works. What could be wrong? Is it virtualbox or are my ubuntu settings configured incorrectly?
Please help
Thanks
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![Port Port](https://miro.medium.com/max/1278/1*lV4gZwNfV5SbxkQyEtjCLw.png)
2 Answers
Setting up a serial port for VirtualBox is not easy, mainly because of many options on how to transfer data from the host to the guest. For transferring data from/to an attached device (here a modem) the following settings should work:
Of course you will have to adopt setting for your device on the host (that would be
/dev/ttyS2
in your case).If using an IRQ greater than 15 for the host you will have to enable I/O APCI as shown here:
After a setup depicted in the example here your Windows guest will see a virtual type 16450 serial port on COM1 using IRQ4 and I/O Port 0x3F8. Data will be transferred from and to host device
TakkatTakkat/dev/ttyS20
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If you are running a Windows host and a Linux Guest - you would use 'COM#:' for the port/file path. Port Mode: Host Device.
If you are running a Linux host and a Windows Guest - you would use '/dev/ttyS#' for the port/file path. Port Mode: Host Device.
Serial Port Cable
Where # is the number of the port.
Virtualbox Serial Port Host Pipe
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