Parent poster&#x27;s bio link points to <a href="https:&#x2F;&#x2F;www.hellotwist.com&#x2F;" rel="nofollow">https:&#x2F;&#x2F;www.hellotwist.com&#x2F;</a>
which does multi-room speaker systems.<p>What I was going to say before thinking to check the link, is that there must be a wealth of applications available  to the instrumentation engineer, using modern microcontrollers without making the full step to Internet of Things.<p>The smoke alarm with the &quot;I&#x27;m cooking for the next ten minutes&quot; button. The simple alarm clock that knows weekends from weekdays, or even your work shifts. The thermostat with a few dozen more available states than the traditional ones and a sane interface. Electric showers that deliver a pleasant showering experience. Smart dumb devices.