AT command for ezDisplay

daemon.py

#!/usr/bin/env python

# https://qiita.com/croquisdukke/items/9c5d8933496ba6729c78

import time
import os
import sys
import serial
import datetime

def main_unit():
    ser = serial.Serial('/dev/ttyUSB0', baudrate=115200, timeout=3)
    str_now = ""
    while True:
        time.sleep(1)
        if str_now != datetime.datetime.now().strftime('%H%M'):
            str_now = datetime.datetime.now().strftime('%H%M')
            ser.write("ATd0=())")
            time.sleep(0.1)

            ser.write("AT88=(0,0," + str_now[0] + ")")
            time.sleep(0.1)

            ser.write("AT88=(16,32," + str_now[1] + ")")
            time.sleep(0.1)

            ser.write("AT88=(32,48," + str_now[2] + ")")
            time.sleep(0.1)

            ser.write("AT88=(48,64," + str_now[3] + ")")
            time.sleep(0.1)

    ser.close()

def daemonize():
    pid = os.fork()#ここでプロセスをforkする
    if pid > 0:#親プロセスの場合(pidは子プロセスのプロセスID)
        pid_file = open('/var/run/python_daemon.pid','w')
        pid_file.write(str(pid)+"\n")
        pid_file.close()
        sys.exit()
    if pid == 0:#子プロセスの場合
        main_unit()

if __name__ == '__main__':
    while True:
        daemonize()

test.py

import serial
import time

ser = serial.Serial('/dev/ttyUSB0', baudrate=115200, timeout=3)

ser.write("AT83=(0,0,ABCD1234)")
time.sleep(0.5)

ser.close()

time.py

import serial
import time
import datetime

ser = serial.Serial('/dev/ttyUSB0', baudrate=115200, timeout=3)

str_now = ""

while True:
  time.sleep(1)
  
  if str_now != datetime.datetime.now().strftime('%H%M'):

    str_now = datetime.datetime.now().strftime('%H%M')

    ser.write("ATd0=())")
    time.sleep(0.1)

    ser.write("AT88=(0,0," + str_now[0] + ")")
    time.sleep(0.1)

    ser.write("AT88=(16,32," + str_now[1] + ")")
    time.sleep(0.1)

    ser.write("AT88=(32,48," + str_now[2] + ")")
    time.sleep(0.1)

    ser.write("AT88=(48,64," + str_now[3] + ")")
    time.sleep(0.1)


ser.close()