main.py

#!/usr/bin/env python3.10
# -*- coding: utf-8 -*-

import sys
from time import sleep
import psutil
import serial.tools.list_ports


def conn_arduino():
    arduino_port = None

    try:
        ports = serial.tools.list_ports.comports()

        for port in sorted(ports):
            active_port = serial.Serial(port.device, timeout=1)

            print('Connecting to ' + active_port.name + '...')
            sleep(2)

            active_port.write(b'HLEO\n')
            msg = active_port.readline().decode().rstrip()

            if msg == 'HBLN':
                print('\"Arduino\" found!')
                arduino_port = active_port
                break

        return arduino_port
    except Exception as e:
        print('Connection to \"Arduino\" failed:')
        print(e)
        sys.exit(1)


def send_data(active_port):
    try:
        sleep(3)

        msg = active_port.readline().decode().rstrip()

        if msg == 'REDY':
            print('\"Arduino\" ready! Start sending data')

            while True:
                cpu = psutil.cpu_percent()
                ram = psutil.virtual_memory().percent

                active_port.write(('DATA|' + str(cpu) + '|' + str(ram) + '\n').encode())

                sleep(1)
        else:
            print('\"Arduino\" is not ready.')
    except Exception as e:
        print('Sending data to \"Arduino\" failed:')
        print(e)
        sys.exit(1)


if __name__ == '__main__':
    print('Comp Info\n')

    print('Searching port \"Arduino\"...')
    while True:
        arduino = conn_arduino()

        if arduino is not None:
            break
        else:
            print('\"Arduino\" not found!')
            print('Continuing to search \"Arduino\"\n')

    if arduino is not None:
        send_data(arduino)