ESP8266 Home Monitor Is Stylishly Simplistic

It’s often said that “Less is More”, and we think that the chic ESP8266 environmental monitor posted by Thingiverse user [bkpsu] definitely fits the bill. Dubbed “Kube”, the device is a 3D printed white cube with an OLED display in the center, which [bkpsu] says was designed specifically for the approval of his wife. Weirdly, she didn’t like the look of bare PCBs on the wall.

Multiple Kubes allow for whole-house monitoring.

Inside, things are a little more complex. The Kube uses the NodeMCU development board, and a custom breakout that [bkpsu] designed to interface with the display and sensors. For temperature and humidity monitoring, the Kube is using the ever-popular DHT22, and [bkpsu] mentions that he has future plans for things like motion sensors and direct control of RGB LED strips. All the data collected by the Kube is piped into openHAB via MQTT.

On the very detailed Thingiverse page, [bkpsu] gives background information on his design goals for the project, tips for printing out a high-quality case, a parts list with Amazon links, and pinout information for getting it all wired up. The PCB is even available on OSH Park for those who want a Kube of their own.

Even with all the stick home monitoring and automation products on the market today, many hackers simply can’t bring themselves to buying a turn-key commercial product. But we think with the results hackers have been getting rolling their own solutions, they just might be on to something.

Me Casa es Techno Casa

“Jarvis, make me a sandwich” is not a reality yet. Though there exist a lot of home automation products out there today, commercial solutions just don’t make the cut for the self-respecting geek. So [Matias] took the DIY route with his La CasaC Home Automation project and achieved the functionality he was after.

[Matias’] project is one of the most elaborate and large-scale DIY home automation projects we have seen in recent years. With over 200 nodes, this project took a number of years of planning and execution. The core of the design is the ever popular Raspberry Pi running OpenHAB to ease the pain of customization and integration with various protocols. To further simplify the ginormous task, the design uses RS485 to communicate between master and slave devices.

Each wall node is managed by a nearby Arduino which in turn talks to a central Arduino Mega. OpenHab takes care of the higher functions such as UI, integration with existing hardware such as the solar heater, media center control,  and RFID and keypad control. Sensor data aggregation and building management is done centrally with data funneled to a separate NAS system as long-term storage.

What makes this project awesome is that [Matias] did not integrate a Raspberry Pi into his house, no! He actually integrated his entire house around the system because this build includes the construction of the house as well. Take a look at this Google Photos Gallery to see the photographic progress of the build. That is amazing!

The code and snippets are available on GitHub for your viewing pleasure though that seems the easy part. If this inspired you, then also take a look at the Raspberry Pi Home Automation of a Gingerbread House if you’d like to try it out before fully committing.

Custom Parts Put IKEA Window Shades On IoT

No matter what the project is about, we’re always suckers for nicely integrated builds with good fit and finish. There’s a certain appeal to rat’s nest wiring on a breadboard, and such projects are valuable because they push the limits. But eventually you need to go from prototype to product, and that’s where this IKEA window shade automation project shines.

Integration is more than just putting everything in a nice box, especially for home automation gear – it really needs to blend. [ehsmaes] roller blind motorization project accomplishes that nicely with a 3D-printed case for the electronics, as well as a custom case for the geared stepper motor to drive the shade. The drive replaces the standard spring-loaded cap on the end of the IKEA Tupplur shade, and the neutral color of both cases blends nicely with the shade and surroundings. The control electronics include a NodeMCU and a motor shield; [eshmaes] warns that narrow shades work just fine off of USB power, but that wider windows will need a power boost. The IoT end of things is taken care of by MQTT and OpenHab, allowing the shades to be raised and lowered to any position. The short video below shows the calibration procedure for the shade.

Need a primer on MQTT? We’ve got you covered. Or perhaps you need to control the windows rather than the treatments.

Continue reading “Custom Parts Put IKEA Window Shades On IoT”

Using SDR to Take Control of Your Home Security System

[Dan Englender] was working on implementing a home automation and security system, and while his house was teeming with sensors, they used a proprietary protocol which was not supported by the open source system he was trying to implement. The problem with home automation and security systems is the lack of standardization – or rather, the large number of (often incompatible) standards used to ensure consumers get tied in to one specific system. He has shared the result of his efforts at getting the two to talk to each other via his project decode345.

The result enabled him to receive signals from Honeywell’s 5800 series of wireless products and interface them with OpenHAB — a vendor and technology agnostic open source automation software. OpenHAB offers “bindings” that allow a wide variety of systems and hardware to be integrated. Unfortunately for [Dan], this exhaustive list does not yet include support for the (not very popular) 345MHz protocol used by the Honeywell 5800 system, hence his project. Continue reading “Using SDR to Take Control of Your Home Security System”

Cheap WiFi Outlets Reflashed; Found to Use ESP8266

There’s a bunch of simple WiFi-enabled outlets on the market today, and all of these blister-pack goodies seem to have something in common – crappy software. At least from the hacker’s point of view; there always seems to be something that you want to do that the app just doesn’t support. Stuck in this position, [scootermcgoober] did the smart thing and reflashed his cheap IoT outlets.

Although [scooter]’s video is very recent, and he says he got his plugs at Home Depot, we were unable to find them listed for sale at any store near us. Walmart lists the same device for a paltry $15, though, so the price is right for repeating his experiment. The video after the break shows his teardown, which locates all the major components, including a mystery module that was revealed to be an ESP8266 upon decapping. Pins were traced, leads were tacked to his serial-to-USB adapter, and soon new firmware was flashing. [scooter]’s new app is simple, but there’s plenty of room for improvement once you’ve got the keys. All the code is up on GitHub.

WiFi outlets like this and the WeMo have proved to be fertile ground for hacking. Of course, if you’re not into the whole blister-pack thing, you could always roll your own WiFi outlet.

Continue reading “Cheap WiFi Outlets Reflashed; Found to Use ESP8266”

Hackaday Prize Entry: Smart Low Voltage Lighting

A common theme around Internet of Things things is connecting a relay to the web. It’s useful for everything from turning on a lamp from across the country to making sure your refrigerator is still running without the twice-hourly calls from the International Refrigeration Commission. For his Hackaday Prize project, [Matt] is turning lights on and off with an ESP8266 WiFi module, but not just any lights: he’s focusing on low-voltage lighting with the ESPLux.

Most downlights and landscape lights run off a 12 or 24 V transformer, and because [Matt] wanted to add dimming to his lighting box, he’s rectifying the low voltage AC to DC; PWMing an output to light an LED is a much better idea than chopping AC with a triac.

With a rectifier, MOSFET, and an ESP8266, the ESPLux is a simple build, but the project doesn’t end with electronics. for automation and control of these lights, [Matt] is turning to OpenHAB, automation software that works with everything you would ever use to make your home smart.

The 2015 Hackaday Prize is sponsored by:

Ridiculously Complicated Home Automation Made Simple

[Eric T] wrote up his insanely-comprehensive home automation setup. What started out as a method to notify him when his dog barked grew into a whole-house, Arduino-powered sensor extravaganza. We’ve previously looked at two different steps from this mammoth article. One automated his dog, the other focused on the Wink hub to bridge with commercial hardware like smart lightbulbs. Now let’s look at the project as a whole.

The basic backbone of the project is actually quite straightforward. He made a radio gateway base station out of an Arduino, a RFM69 radio unit, and an Ethernet shield that connects to a Raspberry Pi to serve up a GUI interface. The open-source home automation project OpenHAB makes it all available through browser or smartphone.

Next, he made additional sensor nodes from Arduino and RMF69 radios. These sensor nodes can all be separate from each other, which has enabled [Eric] to expand his system incrementally over time.

Modules of particular interest are the Uber Sensor and the Washer-Dryer module. For the Uber Sensor, [Eric] basically threw every sensor he could at an Arduino; it sends noise levels, light levels, motion, temperature, humidity, and presence of smoke, flame, or flammable gas. Some of these conditions trigger e-mail alerts, while others are simply stored for future perusal.

On the simpler end of the spectrum, he uses a noise-level detector to detect the end of a laundry cycle and then trigger a notification. The clever bit is that the message is automatically cleared when an attached motion detector triggers, presumably because someone’s gone to the basement to empty the dryer. Very neat.

16All of this is basically made practical and affordable by the presence of simple Arduino libraries and cheap hardware modules purchasable over Ebay. If you’re at all interested in a DIY home automation project, this offering is worth a look for inspiration and a great overview.