Ask HN: Best option for networking power outlets?

#1

Post by webappsecperson » Sun, Mar 29, 2015, 5:31 PM UTC

I'm trying to find a way to remotely - either through a wired hook-up or wireless signal - control a power outlet.

Basically, my ideal setup would be an ethernet or bluetooth controlled plug-in that I could attach to a wall outlet and pass other connections through. I don't want it to have its own software or independent remote though, since I'm trying to hack this into a larger app I'm building with the Kinoma Create.

Does anyone have any ideas for a cost-effective version? I'd love to be able to do my entire (small) apartment, with about 5-6 total outlets in use, for under $200 dollars. I also don't want to electrocute myself!

Thanks HN.

Re: Ask HN: Best option for networking power outlets?

#2

Post by lovelearning » Sun, Mar 29, 2015, 7:14 PM UTC

[Disclaimer: I'm only an amateur electronics hobbyist. The idea below may get me LOL'd at by the experts and get you electrocuted!]

If I were doing this, I would build the power outlet myself using an ESP8266 programmable wifi module and a 110V AC to 3.3V DC switching power supply module.

ESP8266 can connect to your wifi network, and run a TCP socket server, or a web server to receive HTTP commands. Your phone/tablet sends commands to it over your wifi network using TCP or HTTP.

Connection would be like :

110V AC -> switching supply -> 3.3V DC -> powers ESP8266 always on -> switches a relay to supply or cut power at the output side

Cost: An ESP8266 is around $3 and switching module is around $6 on aliexpress.

Re: Ask HN: Best option for networking power outlets?

#3

Post by nimajalali » Sun, Mar 29, 2015, 8:27 PM UTC

Ubiquitis mFi line of products. Each wall outlet cost ~$60, little over your budget but it's a great product. https://www.ubnt.com/mfi/inwall/