Windows 7 Serial Port Communication

Find Out Which Process is Using a Serial COM Port in Windows

Modified7 years, 6 months ago.

This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Server Fault. Closed 7 years ago. I'm looking for the Wireshark of Serial Port monitoring.I'd prefer free/open-source software, but am willing to lookat commercial solutions if the price is reasonable. It needs to be compatible with Windows Vista/7and will be used to monitor all data traffic between two com ports on the same computer. 5454 bronze badges. 29911 gold badge55 silver badges1515 bronze badges. 55 silver badges1515 bronze badges.

I have used the Free Serial Port Monitor, by HHD Software, to monitor communications with an old magnetic card reader. They also have a paid version if you prefer. You could check if Portmon still works. I'm legacy-free here, so I can't test it myself ;). Michael RennerMichael Renner. It appears that the everpresent Mark Russinovich has crafted such a tool, called Portmon. 1919 gold badges7272 silver badges126126 bronze badges. 126126 bronze badges.

Some times you need to access serial port of your PC/LAPTOP to perform some actions like if you want to connect a GSM modem or if you are an Embedded systems programmer then to access program or interface your micro-controllers to your system. If you are performing these tasks on either Windows or Linux then you will requires some program that can communicate with your hardware and system.

In the old days, Windows used to be provided Hyper terminal but now from Windows Vista they don’t provide such a tool, could not understand the reason though . How ever you can still use Hyper terminal in Windows 7 as well as you can use other freely available serial communication utilities like Putty. Putty is a great and free tool and available for both Windows and Linux platforms. If your system does not have any serial port , you can still use a USB-to-Serial adapter When you buy a USB-to-Serial port adapter you will get a driver for it as well.

This driver makes a virtual serial port in your system. In Windows, serial port named as COM port. If you want to use Hyper terminal than you have to download this file. If you want to use Putty than download this file from here. Now you have to follow below steps to communicate with your device:. Step – 1: Connect your device with your system through RS-232 cable or USB-to-Serial adapter and check whether it’s connected successfully or not.

Step – 2: Open device manager and check for COM ports , it get assigned a COM port or not. See below screen shot. If you are not aware about accessing device manager then follow this post. Step – 3: Note down the “COM port number” as we will require it.

Step – 4: Check user manuals or other reference documents related to your hardware for the following information:. Above properties are critical to make the communication correctly, if you don’t configure these properties properly then you will get either junk data or no data.

If you are going to use Hyper terminal than follow Step-5 to Step-9 otherwise follow Step-10 to Step-12. Serial Communication using Hyper Terminal. Step – 5 a Extract the downloaded “hypertermina.rar” file in your system, open the “Hyper terminal” folder and double click on hyper terminal application. You should see the window like the screen shot given below. Step – 5 b Insert a name for the connection, for ex. Step – 5 c Select your “COM” i.e Serial port.

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Step – 5 d You will see the window like below screen shot. Set the values, you noted before remember i.e. According to your device requirements. Step – 5 e Now you are ready to communicate with your device. I am inserting a screen shot which shows a messages received by the device.


Resetting COM Port Numbers in Windows Registry

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