Pythonでシリアル(RS232C)通信

Pythonでシリアル通信(RS232C)通信をして、Arduinoマイコンのテストコマンドを制御してみました。 【準備】pipでpyserialのインストールが必要です。

pip install pyserial

#!/usr/bin/python3
"""
 Python RS232C
 
 ***need pyserial module***
 pip install pyserial
 
 Python3 OS:Windows or Linux

DATE        VER   NAME     COMMENT
 2020/03/02  0.00  garyo  NEW
"""

import serial
import time
import datetime

class PyRs232c():
    
    VERSION = "0.00"
    logFilename = "SIO.log"

    def __init__(self):
        self.baudrate = 9600
        self.com_name = "COM1"
        #self.com_name = '/dev/ttyUSB0'
        self.timeout = 1.0
    
    def setComName(self,com_name):
        self.com_name = com_name
    
    def setBaudrate(self,baudrate):
        self.baudrate = baudrate

    def sioOpen(self,com_name="",baudrate = 0):
        if com_name != "" :
            self.com_name = com_name
        if baudrate != 0:
            self.baudrate = baudrate
        self.ser = serial.Serial(self.com_name,self.baudrate,timeout = self.timeout)
        self.waitt(2)

    def sioClose(self):
        self.ser.close()

    def waitt(self,s):
        time.sleep(s)

    def send(self,s):
        self.logPrintln(self.disp("[Tx:]" + s))
        s = s.encode("shift-jis")
        self.ser.write(s)

    def recv(self,Tout = 10):
        t = time.time()
        timeout = Tout
        ret = b""
        while 1:
            if time.time() - t > timeout :
               break
            c = self.ser.read()
            ret = ret + c
            if c == b'\r':
                pass
            elif c == b'\n':
                break
            else:
                pass

        self.logPrintln(self.disp("[Rx:]" + str(ret,encoding='utf-8')))
        r = str(ret,encoding='utf-8')
        return (r)

    def Send_Command(self,Cmd,jug_str,Tout = 5):

        r = ""
        jug = False
        self.ret = ""
        
        self.send(Cmd + "\r\n")

        t = time.time()
        while 1:
            if time.time() - t > Tout :
               break
            r = r + self.recv()
            if r.find(jug_str) > -1:
                jug = True
                break

        self.ret = r
        return(jug)

    def getRet(self):
        return (self.ret)

    def disp(self,s):
        s=s.replace("\r","[CR]")
        s=s.replace("\n","[LF]")
        return (s)

#Log
    def setLogFilename(self,filename):
        self.logFilename = filename

    def logPrint(self,s):
        f = open(self.logFilename,'a')
        f.write(s)
        f.close()

    def logPrintln(self,s):
        self.logPrint(s + "\n")


if __name__ == "__main__":

    rs232c = PyRs232c()
    rs232c.sioOpen("COM3",9600)
    rs232c.logPrintln("\n[START]" + datetime.datetime.now().strftime('%Y/%m/%d_%H:%M:%S'))

    jug = True

    if jug == True :
        jug = rs232c.Send_Command("PS130","OK")

    while 1:
        if jug == True :
            jug = rs232c.Send_Command("PW130","OK")
        rs232c.waitt(.5)
        if jug == True :
            jug = rs232c.Send_Command("PW131","OK")
        rs232c.waitt(.5)
        if jug == False:
            break

    rs232c.sioClose()