Small python script to scan for daikin air conditioners

daikin_scan.py

import socket
import ipaddress
import urllib.parse

import psutil
from concurrent.futures import ThreadPoolExecutor, as_completed
import requests

PORT = 80
TIMEOUT = 1  # seconds

def get_local_subnet():
    interfaces = psutil.net_if_addrs()
    for interface_addrs in interfaces.values():
        for addr in interface_addrs:
            if addr.family.name == 'AF_INET' and not addr.address.startswith("127."):
                ip = addr.address
                netmask = addr.netmask
                if ip and netmask:
                    network = ipaddress.IPv4Network(f"{ip}/{netmask}", strict=False)
                    return str(network)
    return None

def is_port_open(ip):
    try:
        with socket.create_connection((str(ip), PORT), timeout=TIMEOUT):
            return str(ip)
    except:
        return None

def scan_network(network):
    open_hosts = []
    with ThreadPoolExecutor(max_workers=100) as executor:
        futures = {executor.submit(is_port_open, ip): ip for ip in ipaddress.IPv4Network(network)}
        for future in as_completed(futures):
            result = future.result()
            if result:
                open_hosts.append(result)
    return open_hosts

if __name__ == '__main__':
    subnet = get_local_subnet()
    if not subnet:
        print("Could not determine local subnet.")
    else:
        print(f"Scanning network {subnet} for devices with port {PORT} open...")
        hosts = scan_network(subnet)
        print("Devices with port 80 open:")
        for host in hosts:
            base = "http://"+host
            try:
                r = requests.get(base + "/common/basic_info")
                if r.status_code == 200:
                    parsed_dict = {
                        key: urllib.parse.unquote(value) for key, value in
                        (item.split('=', 1) for item in r.text.split(','))
                    }
                    print(parsed_dict.get("pow"), parsed_dict.get("name"), base)
            except  requests.RequestException:
                pass