树莓派monitor

monitor.py

#!/usr/bin/env python
import os
import time

#show raspberry temperature,CPU,memory

def getCPUtemp():
    temp = os.popen('vcgencmd measure_temp').readline()
    tempfloat = float(temp.replace('temp=','').replace('\'C\n',''))
    print 'CPU Temperature is now %.1f Centigrade' % tempfloat
    if tempfloat > 60:
        print 'CPU Temperature is too high, pls cool it down'

def getCPUusage():
    #calculate CPU with two short time, time2 - time1
    time1 = os.popen('cat /proc/stat').readline().split()[1:5]
    time.sleep(0.2)
    time2 = os.popen('cat /proc/stat').readline().split()[1:5]
    deltaUsed = int(time2[0])-int(time1[0])+int(time2[2])-int(time1[2])
    deltaTotal = deltaUsed + int(time2[3])-int(time1[3])
    cpuUsage = float(deltaUsed)/float(deltaTotal)*100
    print 'CPU Usage is now %.1f' % cpuUsage + '%'

def getRAM():
    #get RAM as list,list[7],[8],[9]:total,used,free
    RAM = os.popen('free').read().split()[7:10]
    #convert kb in Mb for readablility
    RAM0 = float(RAM[0])/1024
    print 'RAM Total is %.1f MB' %RAM0
    RAM1 = float(RAM[1])/1024
    percent = RAM1/RAM0*100
    print 'RAM Used  is %.1f MB, %.2f' % (RAM1,percent) +'%'
    RAM2 = float(RAM[2])/1024
    print 'RAM Free  is %.1f MB' %RAM2

def getDisk():
    #get Disk information,DISK[8],[9],[10],[11]:Size, Used. free, Used %
    DISK = os.popen('df -h /').read().split()[8:12]
    print 'Disk total space is %s ' % DISK[0]
    print 'Disk Used  space is %s ' % DISK[1] +'and is %s' % DISK[3]
    print 'Disk Free  space is %s ' % DISK[2]

while True:
    print '\n-------------SysInfo-----------------\n'
    getCPUtemp()
    getCPUusage()
    getRAM()
    getDisk()
    print '\n-------------------------------------\n'
    time.sleep(5)