python读取串口数据并写入txt文件

以下代码实现从串口2获取数据，如果有新的数据就写入test.txt文件。

# !/usr/bin/python
# encoding:utf-8

import serial

if __name__ == '__main__':
        serial = serial.Serial('COM2','9600')
        if serial.isOpen():
                print('串口打开成功！\n')
                f = open('./test.txt','w') 
                #pass
        else :
                print('串口打开失败！\n')

        try:
                getBytes=b''
                while True:
                        count = serial.inWaiting()
                        if count > 0:
                                data = serial.read(count)
                                if data != getBytes:
                                        #print(data);
                                        f.write(data.decode('utf-8'))
                                        f.write('\n')
                                        getBytes=data

        except KeyboardInterrupt:
                if serial != None:
                        f.close()
                        serial.close()

需要使用以下命令安装serial

pip install pyserial