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  • OP-ModePre-Launch
  • LocationN48 - E11
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Hot Projects

SEEDStack

SEEDStack - Open 3D printable seed/sprouting systemDIY Food Hacking

UCSSPM

UCSSPM - Unified Clear-Sky Solar Prediction ModelOpen Solar Power

picoReflow

picoReflow - DIY PID Reflow Oven Controller based on RaspberryPiDIY Reflow Soldering

PiGI

PiGI - DIY Geiger Counter based on RaspberryPiRasPi Geiger Counter

DIY ARA-2000

Active Wideband Receiver Antenna for SDR - ARA-2000Wideband Antenna

DSpace

DSPace - Map everythingMap everything!

Mission-Tags

Mission-Log

HTTPS Connection Problems

For the last 24 hours a couple of users may have encountered TLS connection problems to this wiki, especially with latest browsers as a result of an unfortunate combination of problems. The last certificate expired yesterday and a new one was rolled out but the new certificate (from STARTSSL) seems to have been signed against STARTCOMs root CA, which was already kicked out by mozilla and google in latest firefox and chrome/ium. As this wiki is only accessible through HTTPS and ensures this by setting HSTS headers, there was no quick fix to mitigate the problem.

Since the whole TLS/HTTPS/CA business is totally broken by design, we either have to live with it or make a conscious move to https://letsencrypt.org/ with https://certbot.eff.org/, which will provide our certs from now on to be more independent from commercial CAs and their leaks and implementation problems.

Sorry for the inconvenience if you were hit by this problem.

Darkmatter - A new theme for LEDE/OpenWRT

Darkmatter is an alternative HTML5 theme for LuCI that has evolved from luci-theme-bootstrap & luci-theme-material, in an attempt to bring a more concise, clean and visually pleasing UX to LEDE/OpenWRT. Check it out, help testing on different devices with different configurations and submit fixes if you can. All is welcome and needed to improve it further.

Desktop View of Status Page

More Screenshots below. Source: https://github.com/apollo-ng/luci-theme-darkmatter

→ Read more...

Joint Statement against Radio Lockdown

The Radio Lockdown Directive threatens user rights and Free Software, fair competition, innovation, environment, and volunteering – without comparable benefits for security. Many organisations and companies are joining up in proposing measures to EU institutions and EU member states to avoid these negative implications while keeping the Directive's goal intact. Please read the in-depth and constantly updated analysis and support the efforts of the FSFE where you can.

More and more devices connect to the Internet and each other using wireless and mobile networks. These include countless devices such as routers, mobile phones, WiFi-cards and laptops. All of them, as well as all Internet-of-Things devices, today and in the future, fall under the regulation of the Radio Equipment Directive 2014/53/EU (hereinafter ‘the Directive’), adopted in May 2014 by the European Parliament and the European Council. The main purposes of the Directive are harmonization of existing regulations, improving security of radio spectra, and protection of health and safety.

We support the general purpose of the Directive. However, we express our concerns over the far-reaching consequences of Article 3(3)(i) of the Directive, which require device manufacturers to check each device software's compliance in order to comply with the Directive.

→ Read more...

More PiGI Geiger counter modules in the Wild

It's truly awesome to see how the PiGI - Raspberry Pi Geiger-Müller Interface, born under ghetto-style conditions with zero prior knowledge or budget, has not only spread to hackers and other individuals with a sense of independence and prudence worldwide, but was now adopted by a special working group of Computer Professionals for Peace and Social Responsibility (FIfF) called Tihange-Doel Radiation Monitoring Network.

PiGI TDRM Setup - Image by tdrm group

More Details about the implementation: https://tdrm.fiff.de/messtechnik.php

It's also great to see so many people actually looking at the details and following the link over here to get background information about it. Welcome everyone.

HOWTO - GL-Inet 6416 External Antenna Hack

gl-inet-6416-external-antenna-hack-9

Since a lot of people continue to show interest in hacking their ML-3020 with an external antenna it was time to show how to do it for the GL.Inet 6416. The following modifications can be done in 5-10 minutes, give you a stable RP-SMA connector and have been tested and running here on 5 units without any problems.

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HOWTO - Update Zebra Printer Firmware on Linux

In case you're in the field and confronted with the task to update a Zebra Printer's Firmware but don't want (or can't) use Zebra's windows-only ZDownloader or Zebra Setup Utilities (both don't seem to work from within Wine) - don't worry: It's actually way easier than it is on Windows and requires only two tools you should have installed on any GNU/Linux or UNIX system anyways: unzip and netcat.

Just follow the next 3 simple steps which worked perfectly for a ZM400 (ZPL) but will probably work for many other Zebra printers as well:

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Active Wideband Receiver Antenna for your SDR

Dressler ARA-2000

Software Defined Radio (SDR) has finally reached a much broader mass of people, who wanted to play with RF technology, but didn't find the time or resources to learn all necessary skills, to build a hardware based radio. Thanks to the work of the GNU-Radio and OsmoCom developer crowd, this barrier is finally gone and everyone can, more or less, directly access, what the antenna receives.

The last Mission-Log about a GNU-Radio based NFM SDR receiver pulled in a lot of people, looking for examples, to better understand GRC and to improve their own SDR projects. The real beauty about it is this: Unlike hardware receivers, which can't simply be replicated and shared, we only have to come up with good software receivers/transceivers once and then may just share them amongst each other, without any limitation.

However, the antenna itself, is still hardware and will most likely never be replaceable by software. On ##rtlsdr people often ask about antennas, because they are clearly not satisfied (and who could blame them) with the performance of the original L/4 DVB-T stub. Unfortunately, there just is no can-do-it-all-perfectly antenna, even if some despicable corporations try to market their products as such.

Other people often recommend Discone-Antennas for wideband reception, but there also are other, less known alternatives, which still are a very good compromise as a general purpose wideband receiver antenna. Not everyone has the space or possibility to put up a Discone-Antenna, so why not use an antenna, that performs even better than a Discone (at least it did here in direct comparison), is a lot smaller and looks way less “conspicuous”:

One of them was the Dressler ARA-2000, covering 50-2000MHz, designed and built in the 90's. The company died the usual death by capitalism (bought by another company and then stripped down and moved production to China). Today there are only a few of these left in the wild and are traded for unrealistic prices on $bay. This particular one was used for the Argus-Prototype but sacrificed and disassembled with the hope, that replicating the antenna will be easy, so that this knowledge would get openly reseeded into the wild, instead of being lost in some archives of a dead corporation. It would be great, if the following documentation about the ARA-2000 would inspire more people, to build their own Active Wideband Receiving Antenna (AWRA) and try to improve and evolve the concept even further or come up with completely new ideas.

→ Read more...

VESC - An open-source/hacker-friendly BLDC ESC

Next generation robots, drones and motorized scooter/skateboard/e-bike projects need efficient and resilient BLDC controllers, so if you're also looking for a solid open-source brushless motor speed controller (BLDC ESC) for your project or knowledge/inspiration to bootstrap your own, then you most definitely want to have a look at VESC.

VESC PCB Top VESC PCB Back

It's a full open-source breed where hardware, firmware and support-software are available on github and no Windows or other crappy, proprietary systems are required for development or tuning/configuration.

BLDC Tool

The DARC Knight rises

It seems like it's time to pre-warm our oscillators and prepare our SDRs for more DARC action in the near future. For more than the last 4 month, the traffic to The DARC side of Munich revealed an interesting pattern: There was a steady increase of traffic coming first from the big European & Asian automobile manufacturers, then from automotive subcontractors globally and now from Asian electronics manufacturers.

DARC entry pages from unique visitors over the last 4 months

These metrics, their sudden occurrence, the event order and the isolation to mostly automotive context simply suggest that there must be something in the works which will get deployed soon (maybe even already is), to broadcast data to cars via DARC. It will get interesting…

EZVD - Easy Voltage-Divider Calc-/Simulator

EZVD Output on the console (python/ncurses)

If you want to learn more about voltage-dividers or need a tool to design/verify voltage-divider resistor selection for your next electronic engineering project, try EZVD - Easy Voltage-Divider Calc-/Simulator