C++ Serial Port Data Reading Guide

2 years ago
William Carter
1 minute

In C++, you can utilize a serial communication library to read serial port data.

Firstly, it is necessary to include the appropriate header and library files.

#include <iostream>
#include <string>
#include <SerialPort.h>

Next, create a SerialPort object.

SerialPort serialPort;

Next, open the serial port.

std::string port = "COM1";  // 指定串口号
int baudRate = 9600;  // 波特率
serialPort.Open(port, baudRate);

Read serial port data.

const int bufferSize = 100;  // 缓冲区大小
char buffer[bufferSize];
int bytesRead = serialPort.Read(buffer, bufferSize - 1);  // 读取串口数据到缓冲区
buffer[bytesRead] = '\0';  // 在读取到的数据后面加上字符串结束符

std::string data(buffer);  // 将缓冲区数据转换为字符串

Finally, close the serial port.

serialPort.Close();

A complete code example:

#include <iostream>
#include <string>
#include <SerialPort.h>

int main() {
    SerialPort serialPort;
    
    std::string port = "COM1";  // 指定串口号
    int baudRate = 9600;  // 波特率
    serialPort.Open(port, baudRate);
    
    const int bufferSize = 100;  // 缓冲区大小
    char buffer[bufferSize];
    int bytesRead = serialPort.Read(buffer, bufferSize - 1);  // 读取串口数据到缓冲区
    buffer[bytesRead] = '\0';  // 在读取到的数据后面加上字符串结束符
    
    std::string data(buffer);  // 将缓冲区数据转换为字符串
    
    std::cout << "Read data: " << data << std::endl;
    
    serialPort.Close();
    
    return 0;
}

Please note that this is just a basic example, the specific implementation may vary depending on the serial communication library you are using. You will need to find the corresponding functions and methods for the library you are using.

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