Hackaday Prize Entry: MyComm Handheld Satellite Messenger

June 27, 2016 by 54 Comments

We live in a connected world, but that world ends not far beyond the outermost cell phone tower. [John Grant] wants to be connected everywhere, even in regions where no mobile network is available, so he is building a solar powered, handheld satellite messenger: The MyComm – his entry for the Hackaday Prize.

The MyComm is a handheld touch-screen device, much like a smartphone, that connects to the Iridium satellite network to send and receive text messages. At the heart of his build, [John] uses a RockBLOCK Mk2 Iridium SatComm Module hooked up to a Teensy 3.1. The firmware is built upon a FreeRTOS port for proper task management. Project contributor [Jack] crafted an intuitive GUI that includes an on-screen keyboard to write, send and receive messages. A micro SD card stores all messages and contact list entries. Eventually, the system will be equipped with a solar cell, charging regulator and LiPo battery for worldwide, unconditional connectivity.

2016 will be an interesting year for the Iridium network since the first satellites for the improved (and backward-compatible) “Iridium NEXT” network are expected to launch soon. At times the 66 Iridium satellites currently covering the entire globe were considered a $5B heap of space junk due to deficiencies in reliability and security. Yet, it’s still there, with maker-friendly modems being available at $250 and pay-per-use rates of about 7 ct/kB (free downstream for SDR-Hackers). Enjoy the video of [Jack] explaining the MyComm user interface:

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Hackaday Prize Entry: A Local Positioning System

June 26, 2016 by 34 Comments

Use of the global positioning system is all around us. From the satnav in your car to quadcopters hovering above a point, there are hundreds of ways we use the Global Positioning System every day. There are a few drawbacks to GPS: it takes a while to acquire a signal, GPS doesn’t work well indoors, and because nodes on the Internet of Things will be cheap, they probably won’t have a GPS receiver.

These facts open up the door for a new kind of positioning system. A local positioning system that uses hardware devices already have, but is still able to determine a location within a few feet. For his Hackaday Prize entry, [Blecky] is building the SubPos Ranger, a local positioning system based on 802.15.4 radios that still allows a device to determine its own location.

The SubPos Ranger is based on [Blecky]’s entry for the 2015 Hackaday Prize, SubPos that used WiFi, RSSI, and trilateration to determine a receiver’s position in reference to three or more base stations. It works remarkably well, even in places where GPS doesn’t, like parking garages and basements.

The SubPos Ranger is an extension of the WiFi-only SubPos, based on 802.15.4, and offers longer range and lower power than the WiFi-only SubPos system. It’s still capable of determining where a receiver is to within a few feet, making this the ideal solution for devices that need to know where are without relying on GPS.

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Hackaday Prize Entry: SunLeaf

June 25, 2016 by 13 Comments

If there’s one place where the Internet of Things makes sense, it’s agriculture. From vast fields of soybeans, corn, and a different variety of corn, to the backyard garden, knowing how much sun, and rain crops get can vastly increase yields. For their Hackaday Prize project, [Adam] and [Shane] are building  a board designed explicitly for plants. It’s called the SunLeaf, and it has all the sensors and radios a good remote sensing board needs.

The SunLeaf is built around an ARM Cortex M4 microcontroller with an ESP8266 module for WiFi connectivity. Sensors are important for any remote sensing board, and for this the guys are going with SeeedStudio Grove connectors, providing four UARTs, four I2C, and four analog ports.For remote sensing applications, you generally can’t rely on mains power, so SunLeaf includes a port for a solar panel and a battery charger.

Although this project was originally a redesign of [Adam] and [Shane]’s Hackaday Prize entry from last year, what they’ve come up with is a great device for data logging, autonomous control, and environmental sensing for anything, from farms to weather stations.

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Hackaday Prize Entry: A 400MHz Modem

June 24, 2016 by 12 Comments

The Internet of Things has been presented as the future of consumer electronics for the better part of a decade now. Billions have been invested, despite no one actually knowing what the Internet of Things will do. Those billions need to go somewhere, and in the case of Texas Instruments, it’s gone straight into the next generation of microcontrollers with integrated sub-GHz radios. [M.daSilva]’s entry to the 2016 Hackaday Prize turns these small, cheap, radios into a portable communicator.

This ‘modem for the 400 MHz band’ consists simply of an ATmega microcontroller, TI’s CC1101 sub-GHz transceiver, an OLED display, and a UHF power amplifier. As far as radios radios go, this is as bare bones as it gets, but with the addition of a USB to serial chip and a small program this radio can send messages to anyone or anything in range. It’s a DIY pager with a couple chips and some firmware, and already the system works.

[M.daSilva] has two use cases in mind for this device. The first is an amateur radio paging system, where a base station with a big power amp transmits messages to many small modules. The second use is a flexible mdoule that links PCs together, using Ham radio’s data modes. With so many possibilities, this is one of the best radio builds we’ve seen in this year’s Hackaday Prize.

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Hackaday Prize Entry: A Raspberry Pi Project

June 23, 2016 by 40 Comments

There’s no piece of technology that has been more useful, more influential on the next generation of sysadmins and engineers, and more polarizing than the Raspberry Pi. For $35 (or just $5), you get a complete single board computer, capable of running Linux, and powerful enough to do useful work. For the 2016 Hackaday Prize, [Arsenijs] has created the perfect Raspberry Pi project. It’s everything you expect a Pi-powered project to be, and more.

While the Raspberry Pi, and the community surrounding the Raspberry Pi, get a lot of flak for the relatively simple approach to most projects which are effectively just casemods, critics of these projects forget the historical context of tiny personal computers. Back in the early ‘aughts, when Mini ITX motherboards were just being released, websites popped up that would feature Mini ITX casemods and nothing else. While computers stuffed into an NES, an old radio, or the AMD logo are rather banal projects today, I assure you they were just as pedestrian 15 years ago as well. Still, the creators of these Mini ITX case mods became the hardware hackers of today. It all started with simple builds, a Dremel, and some Bondo.

[Arsenijs] takes his Raspberry Pi project a bit further than a simple casemod, drawing influence from a Raspberry Pi smartphone, a Raspberry Pi security system, a Portable Raspberry Pi, and a Raspberry Pi wrist computer. These are all excellent projects in their own right, but [Arsenijs] is putting his own special twist on the project: he’s using a Raspberry Pi, and a few Raspberry Pi accessories.

While this project is first and foremost a Raspberry Pi project, [Arsenijs] isn’t limiting himself to the platform with the Broadcom chip. The team behind this Raspberry Pi project was busy porting the project to Odroid when the Banana Pi came out. This changed everything, a refactor was required, and then the Orange Pi was announced. Keeping up with technology is hard, and is a big factor in why this Raspberry Pi project hasn’t delivered yet. You can say a lot of things about the Raspberry Pi foundation, but at least their boards make a good attempt at forward compatibility.

Already [Arsenijs]’ Raspberry Pi project is one of the more popular projects on Hackaday.io, and is in the running for being one of the most popular projects in this year’s Hackaday Prize. Whether that popularity will translate into a minor win for this year’s Hackaday Prize remains to be seen, but it seems for [Arsenijs] that doesn’t matter; he’s already on the bleeding edge of Raspberry Pi projects.

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Hackaday Prize Entry: Reverse GPS

June 22, 2016 by 19 Comments

Every time you watch a SpaceX livestream to see a roaring success or fireball on a barge (pick your poison), you probably see a few cubesats go up. Everytime you watch a Soyuz launch that is inexplicably on liveleak.com before anywhere else, you’re seeing a few cubesats go up. There are now hundreds of these 10 cm satellites in orbit, and SatNogs, the winner of the Hackaday Prize a two years ago, gives all these cubesats a global network of ground stations.

There is one significant problem with a global network of satellite tracking ground stations: you need to know the orbit of all these cubesats. This, as with all Low Earth Orbit deployments that do not have thrusters and rarely have attitude control, is a problem. These cubesats are tumbling through the rarefied atmosphere, leading to orbits that are unpredictable over several months.

[hornig] is working on a solution to the problem of tracking hundreds of cubesats that is, simply, reverse GPS. Instead of using multiple satellites to determine a position on Earth, this system is using multiple receiving stations on Earth’s surface to determine the orbit of a satellite.

The hardware for [hornig]’s Distributed Ground Station Network is as simple as you would expect. It’s just an RTL-SDR TV tuner USB dongle, a few antennas, a GPS receiver, and a Raspberry Pi connected to the Internet. This device needs to be simple; unlike SatNogs, where single base station in the middle of nowhere can still receive data from cubesats, this system needs multiple receivers all within the view of a satellite.

The modern system of GPS satellites is one of the greatest technological achievements of all time. Not only did the US need to put highly accurate clocks in orbit, the designers of the system needed to take into account relativistic effects. Doing GPS in reverse – determining the orbit of satellites on the ground – is likewise a very impressive project, and something that is certainly a contender for this year’s Hackaday Prize.

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Hackaday Prize Entry: BLE Beacon Library

June 21, 2016 by 26 Comments

While faking BLE advertising beacons using an nRF24L01+ module is nothing new, it’s become a heck of a lot easier now that [Pranav Gulati] has written some library code and a few examples for it.

[Pranav]’s work is based on [Dmitry Grinberg]’s epic bit-banging BLE research that we featured way back in 2013. And while the advertisement channel in BLE is limited in the amount of data it can send, a $1 nRF24 module and a power-thrifty microcontroller would be great for a battery-powered device that needs to send small amount of data infrequently for a really long time.

We’re not 100% sure where [Pranav] is going to take this project. Honestly, the library looks like it’s ready to use right now. If you’ve been holding off on making your own BLE-enabled flock of birds, or even if you just want to mess around with the protocol, your life has gotten a lot easier.

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