python 读取串口数据的示例

# TODO 串口读取数据
# Auther wjw

import serial # 导入串口包
import time # 导入时间包


ser = serial.Serial("COM3",115200,timeout = 5) # 开启com3口，波特率115200，超时5
ser.flushInput() # 清空缓冲区

def main():
  while True:
    count = ser.inWaiting() # 获取串口缓冲区数据
    if count !=0 :
      recv = ser.read(ser.in_waiting).decode("gbk") # 读出串口数据，数据采用gbk编码
      print(time.time()," --- recv --> ", recv) # 打印一下子
    time.sleep(0.1) # 延时0.1秒，免得CPU出问题



if __name__ == '__main__':
  main()

import serial
import time
import _thread  # 导入线程包

data_ser = serial.Serial("COM3",115200,timeout = 5)
data_ser.flushInput()



def get_data():
  while True:
    data_count = data_ser.inWaiting()
    if data_count !=0 :
      recv = data_ser.read(data_ser.in_waiting).decode("gbk")
      print(time.time()," --- data_recv --> ", recv)
    time.sleep(0.1)



if __name__ == '__main__':
  
  _thread.start_new_thread(get_data,()) # 开启线程，执行get_data方法
  while 1:
    time.sleep(20) 
    data_ser.write(b'1') # 发送二进制1
    time.sleep(20)
    data_ser.write(b'0') # 发送二进制0

sudo rm /usr/bin/python

sudo ln -s /usr/bin/python3.4 /usr/bin/python