Communication between C++ and COM port

[RTX 3090]

Hi, just wanted to ask a question

What is the easiest library to use to communicate with a COM port in C++. I am making a UI for a multimeter, which gives the following COM input

Quote

id_1:0.56

id_x: is the id of the probe, so you can measure multiple voltages at once. The number after that is the volts in this case 0.56

What I need to do is read the COM line, display the voltage in a GUI which I will make in qt designer, and then read the next line, and keep repeating and updating the voltage. I will also have other ID's e.g. for resistance, so I need to read the serial output from the COM port, but all the libraries I have found online look complicated and I want to know which one will be the easiest to implement. Thanks (btw I'm making the application for Windows)

[igormp]

34 minutes ago, RTX 3090 said:

btw I'm making the application for Windows

Eh, that makes things a bit more complicated, but this should work: https://github.com/wjwwood/serial

 

Haven't tested it though, with linux it's as easy as just reading the serial file as a regular text file, or using pyserial with python instead of cpp.

[RTX 3090]

4 hours ago, James Evens said:

Likley you don't need a additional library and can use the default one.

Which library is that though. If you could send me a link to the docs for it, I would greatly appreciate it, thanks

[RTX 3090]

4 hours ago, igormp said:

with linux it's as easy as just reading the serial file as a regular text file, or using pyserial with python instead of cpp.

unfortunately most people use windows, I want to use QT designer so python is not really an option

[igormp]

12 minutes ago, RTX 3090 said:

I want to use QT designer so python is not really an option

It is tho: https://www.qt.io/qt-for-python

qt has bindings for many languages.

 

Anyway, the lib I mentioned in my first post should hopefully work.

[Unimportant]

On 3/5/2021 at 6:09 PM, RTX 3090 said:

Hi, just wanted to ask a question

What is the easiest library to use to communicate with a COM port in C++. I am making a UI for a multimeter, which gives the following COM input

id_x: is the id of the probe, so you can measure multiple voltages at once. The number after that is the volts in this case 0.56

What I need to do is read the COM line, display the voltage in a GUI which I will make in qt designer, and then read the next line, and keep repeating and updating the voltage. I will also have other ID's e.g. for resistance, so I need to read the serial output from the COM port, but all the libraries I have found online look complicated and I want to know which one will be the easiest to implement. Thanks (btw I'm making the application for Windows)

For windows, the WIN32 api has supported COM ports since nearly forever:

https://www.xanthium.in/Serial-Port-Programming-using-Win32-API