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Overview

This goal of this setup is to put the Sonos speakers on an untrusted network to keep all but the required traffic away from the trusted network where devices like personal computers, phones, etc. live. This write-up assumes you already have two networks setup and working.

Important Note on Unifi OS 3.x

UI broke cross-VLAN multicast DNS in this version. See below for steps to install the multicast-relay script to re-enable this. Without it, your Sonos controller app will not be able to discover your speakers on the other VLAN.

System

I have a Sonos Playbar, Sub, and 2 Play:3's as rear surrounds as one home theater setup connected to a UDM (non-Pro, but this should work on Pro too). Some of this setup may be easier for people with non-paired speakers, as Sonos does some shenanigans with which speaker is actively sending traffic to your wifi.

Have you ever wanted to do:

SELECT * FROM www.google.com

With BigQuery you kind of can. But have you ever wanted to do:

SELECT * FROM www.wikipedia.com

With Wikidata Query Service you kind of can (semantic web!, RDF!?, https://www.w3.org/wiki/SparqlImplementations).

How to install CUDA & cuDNN on Ubuntu 22.04

Install NVIDIA drivers

Update & upgrade

sudo apt update && sudo apt upgrade

Remove previous NVIDIA installation

ANSI Escape Sequences

Standard escape codes are prefixed with Escape:

Ctrl-Key: ^[
Octal: \033
Unicode: \u001b
Hexadecimal: \x1B
Decimal: 27

	# Adapted from https://gist.github.com/batzner/7c24802dd9c5e15870b4b56e22135c96
	import getopt
	import sys

	import tensorflow as tf

	usage_str = ('python tensorflow_rename_variables.py '
	'--checkpoint_dir=path/to/dir/ --replace_from=substr '
	'--replace_to=substr --add_prefix=abc --dry_run')
	find_usage_str = ('python tensorflow_rename_variables.py '

	import os
	import sys
	import inspect
	import signal
	from contextlib import contextmanager

	def _kill_self(signum, frame):
	os._exit(0)

	@contextmanager

	mkdir -p _output

	for i in *.svg
	do
	inkscape --actions="select-all;selection-ungroup;select-all;selection-ungroup;select-all;object-stroke-to-path;" --export-filename=- $i > _output/$i
	echo "done with "$i
	done

	EXPERIMENT 1.
	Program for encryption and decryption :
	def encrypt(text, shift ):
	result =””
	for char in text:
	if char.isalpha():
	if char.islower():
	result+= chr((ord(char)-ord(“a”)+shift)% 26+ ord (a))
	else:
	result+=chr((ord(char)-ord(“A”)+shift) % 26 + ord(“A”))

	import org.mockito.Mock;
	import static org.mockito.Mockito.when;

	@Mock
	private Context mockApplicationContext;
	@Mock
	private Resources mockContextResources;
	@Mock
	private SharedPreferences mockSharedPreferences;

	cd ~/Library/Android/sdk/platform-tools/

	# Get the hash of the mitmproxy-ca certificate.
	openssl x509 -inform PEM -subject_hash_old -in ~/.mitmproxy/mitmproxy-ca.pem \| head -1

	# We will use this hash value, append '.0' (dot zero) and use this as the filename for the resulting Android certificate
	cat ~/.mitmproxy/mitmproxy-ca.pem > c8750f0d.0
	openssl x509 -inform PEM -text -in ~/.mitmproxy/mitmproxy-ca.pem -out /dev/null >> c8750f0d.0

	# In an other terminal, we will start the emulator with writable /system volume