The chosen presentation is to provide code with a growing level of scalability, and a growing level of complexity. This library provides portable, high performance implementation of sockets and serial ports. Instead of presenting an API specific to a single operating system, the Boost.asio library was used. This article explains how to interface with serial ports from C++. Simply the newer Arduinos have a chip that performs the serial to USB conversion. However, nothing has changed on the microcontroller side, nor on the PC side. While the first models had a serial port connector, newer models has an USB port. The problem of the lack of serial ports on computers was solved with USB to serial converters, often embedded into the device itself. In fact, most microcontrollers, even the newer ones have one or more peripherals capable of communicating using this protocol, and from the PC side, all operating systems provide a way of interfacing with serial devices.

Now that we have ADSL modems, the serial ports have disappeared from newer computers, but the protocol is still widely used. Some time ago, when the Internet connections were done using a 56k modem, the serial port was the most common way of connecting a modem to a computer. This note is necessary because there are many other serial protocols, like SPI, I2C, CAN, and even USB and SATA. First, a note: here we're talking about the RS232 serial protocol. According to wikipedia, it has been standadized in 1969. The serial port protocol is one of the most long lived protocols currently in use. It appears they have copied source code to github and updated it for C++11: Introduction I believe the article was originally written by fede.tft.

Qt serial port read write example