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A comment on Harmony Link will no longer work after March 2018. Parent comment

Re:Harmony Link will no longer work after March 2018 by dmm on Wednesday November 08, 2017 @10:37AM (#15653449)
You can build a system that simply controls commercially sourced, UL listed, mains equipment. That top level comment mentioned using IR but you can also control cheap 433Mhz outlets with simple transmitters and a library like rc-switch for arduino[0].

Home assistant also integrates well with openzwave so you can use most zwave devices including a variety of switches.

[0] https://github.com/sui77/rc-switch

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Re:Harmony Link will no longer work after March 2018 by emilburzo on Wednesday November 08, 2017 @10:52AM (#15653590)
Yep, that's exactly how I automate a room fan to turn on over the winter, when the humidity is too high.

A respectable 433MHz controlled plug, an arduino, 433MHz TX and a humidity sensor.

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