Linux 主机性能监视器

创意展示、DIY分享、经验交流
回复
头像
shaoziyang
帖子: 2302
注册时间: 2019年 10月 21日 13:48

Linux 主机性能监视器

#1

帖子 shaoziyang » 2021年 8月 28日 19:29

_RrfkQDl7yF.jpg
_RrfkQDl7yF.jpg (57.88 KiB) 查看 86 次
 
来自:https://www.hackster.io/heposheikki/lin ... tor-1e197e

一个方便的小项目,可以在 LCD 显示屏上查看系统统计信息并通过按键执行命令。

设计这个状态监视器是因为我想在没有任何单独的监控软件的情况下实时查看我的家庭服务器的状态。我在网上搜索了几分钟,找到了一些类似的项目,但他们都遗漏了一些东西,那个东西是我真正理解的脚本,并通过按下按钮来执行命令。放学后我花了几个晚上才把这些放在一起。它的工作方式是,在主机上运行一个单独的 Python 脚本,它使用名为PySerial的 Python 库将系统信息从 /proc/uptime 和 psutil (由 Giampaolo Rodola)通过 USB 提供给 arduino(由 Chris Liechti 撰写)。然后 arduino 将处理后的信息打印到 16x2 LCD 上。arduino 还有两个(或者更多)按钮,用于在主机系统上执行命令。这是我发布的第一个项目,我希望有人觉得它有用:)
 
arduino_stat_monitor_hDCd0FmSlb.jpg
arduino_stat_monitor_hDCd0FmSlb.jpg (45.84 KiB) 查看 86 次
python 代码

代码: 全选

import psutil
import serial
import time
import os
ser = serial.Serial('/dev/ttyUSB0') #define serial port.
line = "nothing"; #create the variable where incoming communication is gonna be saved.
while True:
    sep = ',' 
    sep1 = '.'
    t = os.popen('uptime -p').read()[:-1] #open the file /proc/uptime and read it
    cpu = psutil.cpu_percent(interval=1) #reads the cpu åercetange every second
    if cpu <= 10: #if cpu percetange is less than 10, add a zero, eg. 5% -> 05%. This lessens the propability of a bug happening where ram has two "%" icons
        cpu = '0',str(cpu)
        cpu = str(cpu)
    cpu = str(cpu).replace('"', "")# Remove unecessary characters from string
    cpu = str(cpu).replace("'", "")# --||--
    cpu = str(cpu).replace(' ', "")# --||--
    cpu = 'CPU', str(cpu).split(sep1, 1)[0] #split the string at the first dot and remove anything behind it
    amount_of_ram = str(psutil.virtual_memory()[2]).split(sep1, 1)[0] # --||--
    ram = 'RAM', str(amount_of_ram) # Convert the variable to a string. (Why??)
    uptime = t #more spaghetti for the sake of it
    updisk = (str(uptime).split(sep, 1)[0],'/',psutil.disk_usage('/') [3], '%') #generate a string that contains the uptime and how much of the / drive is used. 
    downdisk = str(cpu) + '% ' + str(ram) + '%' #generate a string that contains the info regarding the RAM and the CPU. I know my naming scheme is stupid.
    downdisk = str(downdisk) #convert the variable to a string??
    upstr = str(updisk) #--||--
    upstr = upstr.replace("(", "") #replace all unecessary characters from the strings
    upstr = upstr.replace(",", "")
    upstr = upstr.replace("'", "")
    upstr = upstr.replace(")", "")
    upstr = upstr.replace("minutes", "m")
    upstr = upstr.replace("minute", "m")
    upstr = upstr.replace("hours", "h")
    upstr = upstr.replace("hour", "h")
    upstr = upstr.replace("days", "d")
    upstr = upstr.replace("day", "d")
    downdisk = downdisk.replace("(", "")
    downdisk = downdisk.replace(",", "")
    downdisk = downdisk.replace("'", "")
    downdisk = downdisk.replace(")", "")
    ser.write(b"*") # Let the arduino know we're about to write onto the second row
    ser.write(upstr.encode()) # Write the data 
    ser.write(b"#") # Let the arduino know we're about to write onto the first row
    ser.write(downdisk.encode())
    line = ser.readline() # Read the serial output
    if (not line == b'nothing\r\n'): # if false any buttons were'nt pressed, do nothing.
        if (line == b'reboot\r\n'): # A reboot was ordered by pressing a button
            os.system("reboot") #reboot the host system, replace the command if you wish to do something else when a button is pressed.
        if (line == b'shutdown\r\n'): # A shutdown was ordered
            os.system("shutdown now")    
    time.sleep(2) # Wait two seconds


# I'm sorry for the spaghetti :)
 
 
Arduino代码

代码: 全选

#include <Wire.h> 
#include <LiquidCrystal.h>

LiquidCrystal lcd(12, 11, 5, 4, 3, 2);
String inData;
const int buttonPin = 6;
const int buttonPin2 = 7;
const int ledPin = 8;
int buttonState = 0; 
int buttonState2 = 0;

void setup() {
    pinMode(buttonPin2, INPUT);
    pinMode(buttonPin, INPUT);
    pinMode(ledPin, OUTPUT);
    Serial.begin(9600);
    lcd.begin(16, 2);
}

void loop() {
  ledPin == HIGH;
  buttonState = digitalRead(buttonPin);
  buttonState2 = digitalRead(buttonPin2);
  if (buttonState == HIGH) {
      Serial.println("reboot");
      delay(250);
    
  }
  if (buttonState2 == HIGH) {
      Serial.println("shutdown");
      delay(250);
    
  }

    while (Serial.available() > 0)
    {
        char recieved = Serial.read();
        inData += recieved; 
        
        if (recieved == '*')
        {
            inData.remove(inData.length() -1, 1);
            lcd.setCursor(0,0);
            lcd.print(inData);
            inData = ""; 
            
            if(inData == "DIS")
            {
              delay(0); 
            }
  Serial.println("nothing");
            
        } 
        
        if (recieved == '#')
        {
            inData.remove(inData.length() -1, 1);
            lcd.setCursor(0,1);
            lcd.print(inData);
            inData = ""; 
        }
    }
}
 
 

回复

  • 随机主题
    回复总数
    阅读次数
    最新文章