Very simple network checking script which reboots your Huawei 5G modem when internet goes down. It will also print the signal statistics as csv every 30 seconds which might help you figure out why things break. Mostly untested, might or might not work, no returns, all purchases are final :-)

netcheck.py

import os
import time
import sys
import csv
import datetime
import subprocess

from huawei_lte_api.Client import Client
from huawei_lte_api.Connection import Connection



def ping(host):
    """
    Returns True if host responds to a ping request
    """
    process = subprocess.Popen(['ping', '-c', '1', host], stdout=subprocess.PIPE, stderr=subprocess.PIPE)
    stdout, stderr = process.communicate()

    # If the call was successful there will be output in stdout
    return bool(stdout)
    
def write_dict_to_stdout(data_dict, first_time):
    """
    Writes a dictionary to stdout in CSV format
    """
    data_dict['time'] = datetime.datetime.now()
    writer = csv.DictWriter(sys.stdout, fieldnames=data_dict.keys())
    
    if first_time:
        writer.writeheader()  # write a header
    
    writer.writerow(data_dict)
    
def main():
    host = "8.8.8.8"
    failed_pings = 0
    
    connection = Connection('http://admin:PASSWORD@192.168.8.1/')
    client = Client(connection)
    write_dict_to_stdout(client.device.signal(), True)

    while True:
      
        if ping(host):
            failed_pings = 0
        else:
            print(f"Failed to reach {host}.", file=sys.stderr)
            failed_pings += 1
            
            if failed_pings >= 3:
                print("Failed to reach host 3 times. Restarting modem...", file=sys.stderr)
                client.device.set_control(ControlModeEnum.REBOOT)
                print("Modem restart command executed. Waiting 5 minutes before retrying...", file=sys.stderr)
                time.sleep(300) # wait 5 minutes before retrying
                failed_pings = 0

        time.sleep(30) # wait 30 seconds before next ping
        write_dict_to_stdout(client.device.signal(), False)  # Can be accessed without authorization

if __name__ == "__main__":
    main()