NetDisco is a Python (2 and 3) library to discover local devices and services. It allows to scan on demand or offer a service that will scan the network in the background in a set interval.

Current methods of scanning:

• mDNS
• uPnP
• Plex Media Server using Good Day Mate protocol
• Logitech Media Server discovery protocol

It is the library that powers the device discovery within Home Assistant.

Netdisco is available on PyPi. Install using pip3 install netdisco (use pip if you're still on Python 2).

From command-line:

python3 -m netdisco
# To see all raw data:
python3 -m netdisco dump

In your script:

import time
from netdisco.discovery import NetworkDiscovery

netdis = NetworkDiscovery()

netdis.scan()

for dev in netdis.discover():
    print(dev, netdis.get_info(dev))

netdis.stop()

Will result in a list of discovered devices and their most important information:

DLNA ['http://192.168.1.1:8200/rootDesc.xml', 'http://192.168.1.150:32469/DeviceDescription.xml']
google_cast [('Living Room.local.', 8009)]
philips_hue ['http://192.168.1.2:80/description.xml']
belkin_wemo ['http://192.168.1.10:49153/setup.xml']