serial中python通信

1、需要导入pyserial 的模块  Python2.7

脚本如下：

# ! /usr/bin/env python
# -*- coding: utf-8 -*-
import sys
import time
reload(sys);
sys.setdefaultencoding("utf-8")
import serial
# 导入串口模块
import threading
import time
import serial
ser = serial.Serial("COM3",115200)
send = ser.write("\n")
send = ser.write("\n")
time.sleep(2)
send = ser.write("root")
send = ser.write("\n")
print ser.portstr
print send
time.sleep(2)
send = ser.write("nE7jA%5m")
send = ser.write("\n")
print send
time.sleep(2)
send = ser.write("export")
send = ser.write("\n")
print send
time.sleep(2)
data = ""
while ser.in_waiting > 0 :
    data+=ser.read(1)
if data != "":
    print data

 2、查看端扣列表 py2.7

#-*- coding: utf-8  -*-
import sys;
reload(sys);
sys.setdefaultencoding("utf-8")
import serial #导入模块
import serial.tools.list_ports
port_list = list(serial.tools.list_ports.comports())
print(port_list)
if len(port_list) == 0:
   print('无可用串口')
else:
    for i in range(0,len(port_list)):
        print(port_list[i])