Are You in Bed?

If you’re building an omniscient home-automation system, it’s ability to make decisions is only as good as the input you give it. [Petewill]’s self-made panopticon now knows when someone is in bed. That way, the [petewill]’s automatic blinds won’t open when he’s sleeping late on weekends.

[Petewill] didn’t take the easy way out here. (In our mind, that would be a weight sensor under one of the bed’s feet.) Instead, his system more flexible and built on capacitive sensing. He’d tried force sensors and piezos under the mattress, but none of them were as reliable as capacitance. A network of copper tape under the mattress serves as the antenna.

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ESP8266 Based Irrigation Controller

If you just want to prevent your garden from slowly turning into a desert, have a look at the available off-the-shelf home automation solutions, pick one, lean back and let moisture monitoring and automated irrigation take over. If you want to get into electronics, learn PCB design and experience the personal victory that comes with all that, do what [Patrick] did, and build your own ESP8266 based irrigation controller. It’s also a lot of fun!

[Patrick] already had a strong software background and maintains his own open source home automation system, so building his own physical hardware to extend its functionality was a logical step. In particular, [Patrick] wanted to add four wirelessly controlled valves to the system.

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Roll Your Own Amazon Echo on a Raspberry Pi

Speech recognition coupled with AI is the new hotness. Amazon’s Echo is a pretty compelling device, for a largish chunk of change. But if you’re interested in building something similar yourself, it’s just gotten a lot easier. Amazon has opened up a GitHub with instructions and code that will get you up and running with their Alexa Voice Service in short order.

If you read Hackaday as avidly as we do, you’ve already read that Amazon opened up their SDK (confusingly called a “Skills Kit”) and that folks have started working with it already. This newest development is Amazon’s “official” hello-world demo, for what that’s worth.

There are also open source alternatives, so if you just want to get something up and running without jumping through registration and licensing hoops, you’ve got that option as well.

Whichever way you slice it, there seems to be a real interest in having our machines listen to us. It’s probably time for an in-depth comparison of the various options. If you know of a voice recognition system that runs on something embeddable — a single-board computer or even a microcontroller — and you’d like to see us look into it, post up in the comments. We’ll see what we can do.

Thanks to [vvenesect] for the tip!

Banish Dangerous Shadows Under Kitchen Cabinets

[nebulous] has a lot of problems with his kitchen cabinets. Aside from a noted lack of micro-controllers, he was especially suspicious of the dark spaces under them. Anything could be hiding there.

The core of the project is a $10 Arduino-compatible esp8266 board from digistump. The board is powered by the five volt regulator of an L298N motor driver module hooked to a power-supply. All this controls a set-of LED strips adhered to the underside of the cabinets with the traditionally bad adhesive strips with which they come standard. We can predict an hour spent bent awkwardly cursing at them, a hot-glue gun in one hand, in [nebulous]’s future. The whole set-up is housed in a SparkFun cardboard box above the microwave. You can barely tell it’s not a commercial product.

We’re not certain if we like a future where even our cabinetry has an IP address. However, this is a good weekend project that could make all our cabinetry brighter, safer, and more connected.

Ridiculously Automated Dorm Room

Take three NRF24L0+ radios, two Arduino Nanos, and a Raspberry Pi. Add a bored student and a dorm room at Rice University. What you get is the RRAD: Rice Ridiculously Automated Dorm. [Jordan Poles] built a modular system inspired by BRAD (the Berkeley Ridiculously Automated Dorm).

RRAD has three types of nodes:

  • Actuation nodes – Allows external actuators like relays or solenoids
  • Sensory nodes – Reports data from sensors (light, temperature, motion)
  • Hub nodes – Hosts control panel, records data, provides external data interfaces

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Pimped out 70’s Home Intercom System, Now with More Pi

If you own a house that was built in the 1970’s, you might still have the remnants of a home intercom system on the walls of each room. They were consider the end-all-be-all of “home automation” back in the day. Now, they look dated and out of place (but still kind of retro-cool at the same time).  [Cpostier] decided that he wanted to keep his old intercom system, but give it an update with a Rasperry Pi and a 7 inch touch screen, and the results are totally groovy, man.

The original unit served two functions, as an intercom system, and also as a whole house music player.  [Cpostier] wasn’t interested in the intercom feature, and so he started with the traditional gutting of the 70’s dried up electronics. Each room received a new $7 speaker (from Amazon), and the main control panel was fitted with a Pi, TFT touch screen, and new amplifier. The Pi is running Kodi (formerly know as XBMC) and along with it being a great media player, it can also show weather data, or what ever else you would like.

Something magical happens when you blend new tech with old tech – we totally dig it.

Custom Siri Automation with HomeKit and ESP8266

Knowing where to start when adding a device to your home automation is always a tough thing. Most likely, you are already working on the device end of things (whatever you’re trying to automate) so it would be nice if the user end is already figured out. This is one such case. [Aditya Tannu] is using Siri to control ESP8266 connected devices by leveraging the functionality of Apple’s HomeKit protocols.

HomeKit is a framework from Apple that uses Siri as the voice activation on the user end of the system. Just like Amazon’s voice-control automation, this is ripe for exploration. [Aditya] is building upon the HAP-NodeJS package which implements a HomeKit Accessory Server using anything that will run Node.

Once the server is up and running (in this case, on a raspberry Pi) each connected device simply needs to communicate via MQTT. The Arduino IDE is used to program an ESP8266, and there are plenty of MQTT sketches out there that may be used for this purpose. The most recent example build from [Aditya] is a retrofit for a fiber optic lamp. He added an ESP8266 board and replaced the stock LEDs with WS2812 modules. The current version, demonstrated below, has on/off and color control for the device.

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