internet of things

149 Articles

An Eight-Day Home Automation Hackathon Is Inspiration For Getting More Projects Done

January 24, 2020 by 11 Comments

There’s nothing quite like a deadline to cut through extras and get right at the heart of the problem. Maybe we should all follow Interpreet’s example and stop thinking about automating our homes and just make it in an eight-day hackathon. His talk at the 2019 Hackaday Superconference covers the zero-to-deployment home automation build he finished in the eight days leading up to his move from one continent to another.

Hackaday’s very own Inderpreet Singh found himself pulling up roots and moving from his home in India to teach at Centennial College in Toronto, Canada. He needed a way to keep an eye on his home from afar and the name of the game is IoT. When the only choice is “whatever works right now”, you can learn a lot about simple solutions.

He chose familiar hardware to work with, with the ESP8266 making up the bulk of the nodes and a Raspberry Pi as as a central hub for the setup. He chose to communicate between all the nodes on his system using WiFi because the hardware is robust and available. With security in mind, he keeps the automation system separate from the daily use WiFi system by grabbing an extra access point to serve as the automation network. The Raspberry Pi serves as a router of sorts; its Ethernet port is connected to the IoT device’s AP, while the onboard WiFi is used to connect to the home’s main AP for a connection to the wider Internet.

Software for the system is built on a REST API served by a Python Flask app. Many would advocate for using MQTT but Inderpreet’s testing with that protocol came up short as the broker he intended to use was no longer available. One of the interesting parts of his system design is that all nodes will check in at regular intervals; this allows them to inquire about actions they need to take, but it also allows the system to detect a malfunctioning node immediately. I’ve seen a similar trick used by Elliot Williams where he assigns a “ping” topic to all MQTT devices that causes them to report in with their IP address. Having a system to query and ensure the health of every node is a big tip to take away from this talk.

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Home Safety Monitoring With IoT

January 17, 2020 by 21 Comments

Home automation is a popular project to undertake but its complexity can quickly become daunting, especially if you go further than controlling a few lights (or if you’re a renter). To test the waters you may want to start with something like this home safety monitor, which is an IoT device based on an Arduino. It allows remote monitoring of a home for things such as temperature, toxic gasses, light, and other variables, which is valuable even if you don’t need or want to control anything.

The device is built around an Arduino Nano 33 IOT which has WiFi and Bluetooth capabilities as well as some integrated security features. This build features a number of sensors including pressure/humidity, a gas/smoke detector, and a light sensor. To report all of the information it gathers around the home, an interface with Ubidots is configured to allow easy (and secure) access to the data gathered by the device.

The PCB and code for the project are all provided on the project page, and there are a number of other options available if Ubidots isn’t your preferred method of interfacing with the Internet of Things. You might even give Mozilla’s WebThings a shot if you’re so inclined.

2019: As The Hardware World Turns

December 27, 2019 by 31 Comments

Well, this is it. The end of the decade. In a few days the 2010s will be behind us, and a lot of very smug people will start making jokes on social media about how we’re back in the “Roaring 20s” again. Only this time around there’s a lot more plastic, and drastically less bathtub gin. It’s still unclear as to how much jazz will be involved.

Around this time we always say the same thing, but once again it bears repeating: it’s been a fantastic year for Hackaday. Of course, we had our usual honor of featuring literally thousands of incredible creations from the hacking and making community. But beyond that, we also bore witness to some fascinating tech trends, moments that could legitimately be called historic, and a fair number of blunders which won’t soon be forgotten. In fact, this year we’ve covered a wider breadth of topics than ever before, and judging by the record setting numbers we’ve seen in response, it seems you’ve been just as excited to read it as we were to write it.

To close out the year, let’s take a look at a few of the most popular and interesting stories of 2019. It’s been a wild ride, and we can’t wait to do it all over again in 2020.

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Found Footage: Elliot Williams Talks Nexus Technologies

November 7, 2019 by 25 Comments

Back at the 2017 Superconference, Hackaday Managing Editor Elliot Williams started his talk about the so-called “Internet of Things” by explaining the only part he doesn’t like about the idea is the Internet… and the things. It’s a statement that most of us would still agree with today. If anything, the situation has gotten worse in the intervening years. Commercial smart gadgets are now cheaper and more plentiful than they’ve ever been, but it seems like precious little has been done to improve their inherent privacy and security issues.

But his talk doesn’t serve to bash the companies producing these devices or even the services that ultimately folded and left their customers with neigh useless gadgets. That’s not his style. The central theme of “Nexus Technologies: Or How I Learned to Love WiFi” is that a smart home can be wonderful thing, assuming it works the way you want it to. Elliot argues that between low-cost modular hardware and open source software, the average hacker has everything they need to build their own self-contained home automation ecosystem. One that’s not only cheaper than what they’re selling at the Big Box electronics store, but also doesn’t invite any of the corporate giants to the party.

Of course, it wasn’t always so. A decade ago it would have been all but impossible, and five years ago it would have been too expensive to be practical. As Elliot details his journey towards a truly personal smart home, he explains the advances in hardware and software that have made it not just possible on the DIY level, but approachable. The real takeaway is that once more people realize how cheap and easy it is to roll your own smart home gadgets, they may end up more than willing to kick Big Brother to the curb and do IoT on their own terms.

This previously unpublished recording somehow slipped between the cracks of the editing room floor but upon recent discovery, it’s still just as relevant today. Take a look at Elliot’s view on Nexus Technologies, then join us after the break for a deeper dive. Make sure to subscribe to Hackaday’s YouTube channel to get in on the 2019 Hackaday Superconference live stream starting Saturday, November 16th.

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A Low-Power Solution To Streamlining Sensor Data For IoT

October 18, 2019 by 16 Comments

For home use IoT systems, getting sensor data from tons of physical locations centralized to a single Raspberry Pi can be a difficult job, especially when considering the power consumption that’s necessary for doing it all over WiFi. When you’re using an ESP8266, for instance, swapping out batteries and accounting for connectivity issues can be a major hassle for a long-term solution. The NoCAN platform, created by [Alain Pannetrat], solves this problem using a wired approach that improves the use of the CAN bus.

Since SPI and I2C only work for short distances, approaches like RS-485 and CAN bus are a better bet for this type of setup. For systems with one centralized point, RS-485 works best – thus, the CAN bus is the better approach when you’re considering using multiple masters in a single environment.

CAN devices typically need a static address, so messaging involves sending data to the known address of the destination device. With NoCAN, a dynamic address assignment scheme allows nodes to request an address from a node manager on boot-up (similar to DHCP). A command line application also allows users to send and receive message from nodes using a pub/sub implementation – a device sends messages to a channel, and every device subscribed to the channel receives the message.

The hardware for the NoCAN platform consists of a Raspberry Pi with a “PiMaster” HAT and an Arduino-compatible CANZERO board. The PiMaster HAT uses an STM32F042 ARM Cortex M0 MCU, acting as an interface between the Pi and the CAN bus as well as preventing over-current events with a software-controlled smart switch. The CANZERO is based on the the SAMD21G18 ARM Cortex M0+ running at 48MHz, similar to the Arduino MKR Zero, with CAN bus networking using the STM32F042 ARM Cortex M0. The double MCU design allows the secondary MCU to reset the primary if it gets stuck due to a programming error, with the messages sent over the CAN bus.

To join the network together, a four-wire cable daisy-chains the nodes in the bus network, providing connectivity for up to 1000 feet. Either 12V or 24V DC power runs through the network, stepping down to 5V or 3.3V at each node. The approach is similar to PoE (power over Ethernet), although it is slower and lower in cost. Overall, it seems like a good solution for environments where wireless connectivity simply doesn’t cut it.

Teardown: Quirky Egg Minder

October 8, 2019 by 59 Comments

Many of the biggest stars are hesitant to do sequels, believing that the magic captured the first time around is hard to reproduce in subsequent productions. As I’m known (at least around the former closet that now serves as my home office) as the “Meryl Streep of Teardowns”, I try to follow her example when it comes to repeat performances. But if they could get her to come back for another Mamma Mia film, I suppose I can take a look at a second Quirky product.

An elderly egg calls to inquire about euthanasia services.

This time around we’ll be looking at the Quirky Egg Minder, a smart device advertised as being able to tell you when your eggs are getting old. Apparently, this is a problem some people have. A problem that of course is best solved via the Internet of Things, because who wouldn’t pay $80 USD for a battery-powered WiFi device that lives in their refrigerator and communicates vital egg statistics to an online service?

As it turns out, the answer to that question is “most people”. The Egg Minder, like most of its Quirky peers, quickly became a seemingly permanent fixture of retailer’s clearance shelves. This particular unit, which I was able to pick up new from Amazon, only cost me $9.99. This is still more than I would have paid under normal circumstances, but such sacrifices are part and parcel with making sure the readers of Hackaday get their regular dose of unusual gadgetry.

You may recall that our last Quirky device, the “Refuel” propane tank monitor, ended up being a fantastically engineered and built piece of hardware. The actual utility of the product was far from certain, but nobody could deny that the money had been spent in all the right places.

What will the internals of the Egg Minder reveal? Will it have the same level of glorious over-engineering that took us by surprise with the Refuel? Will that zest for form over function ultimately become the legacy of these Quirky devices, or was it just a fluke? Let’s crack this egg and find out.

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The Trials And Tribulations Of Building An IOT Garage Door Opener

July 15, 2019 by 18 Comments

Garage doors can be frustrating things, being a chore to open manually and all. Many people opt to install a motorized opener, but for some, even this isn’t enough. Hooking up a garage door to the Internet of Things has long been a popular project, and [Simon Ludborzs] decided to give it a shot. Naturally, there were some obstacles to be overcome along the way.

[Simon]’s build is relatively straight down the lines, using an ESP-12 as the brains of the operation, which connects to the internet over WiFi. However, robustness was a major goal of the project, and being reliant on shaky cloud-based services wouldn’t do. This opener is set up to work independently of an internet connection, too. There’s a nifty control panel with glowing buttons to operate the opener, in addition to the webpage served up on the network.

During the development, [Simon] ran into several roadblocks. A set of roller door motors were inadvertently killed, and there were issues in getting the web interface working as expected. None of these were showstoppers, though, and with a little work and some new parts, everything came together in the end. The project was then given a proper commercial-grade case, sourced from AliBaba. This is a great step to take for a project expected to hold up to daily use for years on end. He also took the time to document his tips for easier ESP8266 development, which may prove useful to those just getting started with the platform.

Garage door openers remain a common theme around here, but every project has its own story to tell. If you’ve developed a particularly unique solution to your garage access problems, you know who to call.