Small script to check serial port sucking down system resources.

sem2jy at gmail.com sem2jy at gmail.com
Mon Dec 16 15:31:13 CET 2013


i am new to python and programming all together.

i wrote a program to watch a serial port and look for a command.  
then send a tcp packet.  
all works great but it takes my processor load to about %25.
not sure if there is a way to make this more efficient.

import serial

import socket
HOST = '127.0.0.1'    # The remote host
PORT = 5250             # The same port as used by the server
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.connect((HOST, PORT))

##vvvvvvvvvvvv

ser = serial.Serial(
    port='COM10',\
    baudrate=9600,\
    parity=serial.PARITY_NONE,\
    stopbits=serial.STOPBITS_ONE,\
    bytesize=serial.EIGHTBITS,\
        timeout=0)

print("connected to: " + ser.portstr)

#this will store the line
line = []
c = 0
while True:
    for c in ser.readline():
        line.append(c)

        if c == '1':
            
            s.send('CG 1-21 ADD 1 reserveisoff 1 \r\n')
            data = s.recv(1024)
            print 'Received', repr(data)
           
            print("one")
            line = []
            break
     
        if c == '2':
            
            s.send('PLAY 1-1 AMB.mp4 \r\n')
            data = s.recv(1024)
            print 'Received', repr(data)
            s.send('LOADBG 1-1 EMPTY MIX 30 AUTO \r\n')
            data = s.recv(1024)
            print 'Received', repr(data)
            print("two")
            line = []
            
            break

s.close()
ser.close()






More information about the Python-list mailing list