树莓派监控CPU温度以及使用率

树莓派查看CPU温度的命令很简单

#查看温度
cat /sys/class/thermal/thermal_zone0/temp
#树莓派返回的温度
39546

这个返回的温度除以1000就是当前树莓派CPU的温度了。

补充

树莓派除了Zero系列，发热量都很大，为了防止板子或SD卡被烧坏，我在网上找到一段python脚本，专用用来监控树莓派CPU温度、使用率，顺便也观察一下内存以及硬盘的占用情况，我将其命名为monitor.py

#!/usr/bin/env python
import os
 
# Return CPU temperature as a character string                                      
def getCPUtemperature():
    res = os.popen('vcgencmd measure_temp').readline()
    return(res.replace("temp=","").replace("'C\n",""))
 
# Return RAM information (unit=kb) in a list                                       
# Index 0: total RAM                                                               
# Index 1: used RAM                                                                 
# Index 2: free RAM                                                                 
def getRAMinfo():
    p = os.popen('free')
    i = 0
    while 1:
        i = i + 1
        line = p.readline()
        if i==2:
            return(line.split()[1:4])
 
# Return % of CPU used by user as a character string                                
def getCPUuse():
    return(str(os.popen("top -n1 | awk '/Cpu\(s\):/ {print $2}'").readline().strip()))
 
# Return information about disk space as a list (unit included)                     
# Index 0: total disk space                                                         
# Index 1: used disk space                                                         
# Index 2: remaining disk space                                                     
# Index 3: percentage of disk used                                                  
def getDiskSpace():
    p = os.popen("df -h /")
    i = 0
    while 1:
        i = i +1
        line = p.readline()
        if i==2:
            return(line.split()[1:5])
 
 
# CPU informatiom
CPU_temp = getCPUtemperature()
CPU_usage = getCPUuse()
 
# RAM information
# Output is in kb, here I convert it in Mb for readability
RAM_stats = getRAMinfo()
RAM_total = round(int(RAM_stats[0]) / 1000,1)
RAM_used = round(int(RAM_stats[1]) / 1000,1)
RAM_free = round(int(RAM_stats[2]) / 1000,1)
 
# Disk information
DISK_stats = getDiskSpace()
DISK_total = DISK_stats[0]
DISK_used = DISK_stats[1]
DISK_perc = DISK_stats[3]
 
if __name__ == '__main__':
    print('')
    print('CPU Temperature = '+CPU_temp)
    print('CPU Use = '+CPU_usage)
    print('')
    print('RAM Total = '+str(RAM_total)+' MB')
    print('RAM Used = '+str(RAM_used)+' MB')
    print('RAM Free = '+str(RAM_free)+' MB')
    print('')
    print('DISK Total Space = '+str(DISK_total)+'B')
    print('DISK Used Space = '+str(DISK_used)+'B')
    print('DISK Used Percentage = '+str(DISK_perc))

然后修改一下这段脚本的权限

chmod +x monitor.py

将其放到/usr/local/bin目录下，接下来就可以全局使用了

sudo cp monitor.py /usr/local/bin

最后输出结果如下：

CPU Temperature = 53.5
CPU Use = 0.3
RAM Total = 443.0 MB
RAM Used = 30.0 MB
RAM Free = 381.0 MB
DISK Total Space = 3.6GB
DISK Used Space = 1.1GB
DISK Used Percentage = 31%