A small python script to reboot a TP-Link PLC (tested on WPA4220)

reboot_plc.py

#!/usr/bin/env python3
"""
reboot_plc.py:

This automation script automatically reboots a TP-Link Extender when
internet connectivity drops.

Tested using:
 - TL-WPA4220 (v4.0, Firmware: 4.0.3)
"""
__author__    = "Ellis Dickinson"
__copyright__ = "Copyright 2022, ByteFloater"
__version__   = "0.2"
__status__    = "Development"

import time
import requests

from selenium import webdriver
from selenium.common.exceptions import NoSuchElementException
from selenium.webdriver.chrome.options import Options
from selenium.webdriver.chrome.service import Service
from selenium.webdriver.common.keys import Keys
from selenium.webdriver.common.by import By
from webdriver_manager.chrome import ChromeDriverManager


def internet_connected() -> bool:
    """
    Performs an internet connectivity check

        Returns:
            (bool): Boolean flag indicating the connectivity state
    """
    url = "http://www.google.com"
    timeout = 5

    try:
        # Internal -> External Connectivity
        requests.get(url, timeout=timeout)
        # External -> Internal Connectivity
        requests.get(f"http://{get_current_ipv4()}", timeout=timeout)
        return True
    except (requests.ConnectionError, requests.Timeout):
        return False

def get_current_ipv4() -> str:
    """
    Returns the current external IPv4 address using a
    service from SpDYN

        Parameters:
            None

        Returns:
            (str): IPv4 Address
    """
    ip_address = requests.request("GET", "http://checkip4.spdyn.de/").text.strip()
    return ip_address

def perform_restart(plc_addr: str) -> None:
    """
    Attempts a restart of the TP-PLC

        Parameters:
            plc_addr (str): URL of target device

        Returns:
            None
    """
    chrome_options = Options()
    chrome_options.add_argument("--headless")
    chrome_options.add_argument('--no-sandbox')
    chrome_options.add_argument('--disable-dev-shm-usage')

    driver = webdriver.Chrome(
        service = Service(ChromeDriverManager().install()),
        options = chrome_options
    )
    driver.implicitly_wait(10)
    driver.delete_all_cookies()
    driver.get(plc_addr)

    login_box = driver.find_element(
        By.ID,
        "pcPassword"
    )
    login_box.clear()
    login_box.send_keys('admin')

    login_btn = driver.find_element(
        By.ID,
        "loginBtn"
    )
    login_btn.send_keys(Keys.ENTER)

    reboot_btn = driver.find_element(
        By.ID,
        "top-control-reboot"
    )
    reboot_btn.click()
    confirm_btn = driver.find_element(
        By.CSS_SELECTOR,
        "button.button-button.btn-msg.btn-msg-ok.btn-confirm"
    )
    confirm_btn.click()

    time.sleep(100)
    driver.quit()


if not internet_connected():
    try:
        perform_restart("http://[IP_ADDRESS]")
        print("Restart attempt successful")
    except NoSuchElementException:
        print("Encountered a workflow error during the restart process.")
else:
    print("Internet connected - no action required at this time.")

If you want you can also use the native api of the device.

See https://github.com/3v1n0/TL-WPA4220-python