python读取串口 数据

注：和esp32配合时波特率设高点，比如115200，不然会得不到数据.

读取10s数据，然后关闭串口

#读取10s串口数据后关闭这个串口
import time

def read_serial(port, baudrate, duration):
    try:
        # 初始化串口
        ser = serial.Serial(port, baudrate)
        print(f"Opened serial port {port} at {baudrate} baud.")
        
        # 记录开始时间
        start_time = time.time()
        
        # 持续读取数据直到指定的时间（10秒）到达
        while time.time() - start_time < duration:
            # 从串口读取一行数据
            #line = ser.readline().decode('utf-8')
            line = ser.readline().decode('utf-8').strip()
            if line:
                print(f"Received data: {line}")
        
        print(f"Reading data for {duration} seconds completed.")

    except serial.SerialException as e:
        print(f"Error opening or using serial port: {e}")
    finally:
        # 关闭串口
        if ser.is_open:
            ser.close()
            print(f"Closed serial port {port}.")

# 设置串口参数
port = 'COM3'     # 根据实际情况更改为您的串口端口，例如'/dev/ttyUSB0'或'/dev/ttyS0'等
baudrate = 115200   # 设置波特率
duration = 10     # 持续时间为10秒

# 调用函数读取串口数据
read_serial(port, baudrate, duration)