arduino i2c lcd pc stats https://arduino-info.wikispaces.com/LCD-Blue-I2C

arduino.ino

#include <Wire.h>  
#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x27, 2, 1, 0, 4, 5, 6, 7, 3, POSITIVE);

void setup()
{
  Serial.begin(9600);

  lcd.begin(20, 4);
  lcd.backlight();
  lcd.setCursor(0, 0);
}

void loop()
{
  if (Serial.available()) {
    
    delay(100);  

    lcd.clear();
    int rowCounter = 0;
    int charactersRead = 0;
    while (Serial.available() > 0) {
      

      if (charactersRead && charactersRead % 20 == 0)
      {
        rowCounter = (rowCounter + 1) % 4; 
        lcd.setCursor(0, rowCounter);
      }
      
      charactersRead ++;
      
      lcd.write(Serial.read());
    }
  }
}

sender.py

import serial
import time
from serial.tools import list_ports
import random
import psutil



ports = list(list_ports.comports())
arduino_port = None
for port_id, port_name, port_address in ports:
	if 'arduino' in port_name.lower():
		arduino_port = port_id

	

if not arduino_port:
	raise Exception('arduino not detected')

arduino_port = arduino_port[3:]
arduino_port = int(arduino_port) - 1
ser = serial.Serial(arduino_port)  

counter = 0
while True:
	
	usage = psutil.cpu_percent(interval=1)
	usage = int(usage)
	
	lines = []
	
	lines.append('CPU: {0}%'.format(usage))
	lines.append('RAM: {0}GB'.format(random.randint(2,4)))
	lines.append('STORAGE: {0}GB'.format(random.randint(100,200)))
	lines.append('PROCESSES: {0}'.format(random.randint(50,60)))
	
	message = ''
	
	for line in lines:
	
		if len(line) >= 10:
			
			message += line + ' ' * (20-len(line))
				
		elif len(line) >= 5:
			
			message += line + ' ' * (10-len(line))

		elif len(line) > 0:
			
			message += line + ' ' * (5-len(line))
	
	ser.write(message)
	counter += 1