If you think about smart-home gadgets at all, you probably think about energy-saving thermostats or lights you control with an app. Most people don’t worry about how they work, let alone how they might work together.
Some of tech’s biggest players— Apple Inc., Alphabet Inc . ’s Google, Amazon . com Inc. and Samsung Electronics Co . —have established smart-home platforms, so your iPhone can turn off the lights or Alexa can change the thermostat without too…
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