Bastian Raschke
Nils Tegetmeyer

Sicherheitskritisch

Ein Blog über IT-Sicherheit und Technik

Professional electric cruiserboard (DIY) controlled with modified Wii Nunchuck

Verfasst von Bastian Raschke.
Veröffentlicht am 2017-04-16 in der Kategorie ESP8266.

When i took my pennyboard with me, people often saw the technical upgrade under the board and asked me if the board has a motor. I always had to answer No, it has only light and Wi-Fi - but these comments challenged me... Additionally Nils motivated me that i need an electric board for sure. So i started to build one.

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Build your own smart Wi-Fi button for 9€

Verfasst von Bastian Raschke.
Veröffentlicht am 2017-03-30 in der Kategorie ESP8266.

For my OpenHab smarthome setup in my room i needed some physical switches to avoid to always need to unlock my phone, start the app, wait until its connected and finally turn on the lights. I use OpenHAB because i have a mixed setup with a lot of Philips Hue bulbs and also some DIY lightstrips which are connected via a ESP8266 and receive their commands via MQTT from my broker. Thus i can't simply use Philips Hue switches. Of course it is possible to grab the state of these switches via OpenHab but in my view these switches are to expensive just because it is just a switch. Other commercial Wi-Fi smart buttons cost nearly the same or more (40€+).

Finally i decided to build my own Wi-Fi buttons with ESP8266...

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Pennyboard mini cruiser as glowboard with Wi-Fi and a smartphone app

Verfasst von Bastian Raschke.
Veröffentlicht am 2016-10-26 in der Kategorie ESP8266.

I just started skating in June 2016. I bought a mini cruiser (better known as "Pennyboard") on Amazon and trained a lot just to be able to cruise through out the city without too much trouble - it took a lot of time for me to get the hang of it :-D I wanted to combine my new hobby with my other nerdy electronics/programming hobby - I built a super cool board with an LED underglow light, which looks really impressive in the dark. But see for yourself:

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A5/1 cipher online simulator demo for visualisation of the internal algorithms

Verfasst von Bastian Raschke.
Veröffentlicht am 2016-09-11 in der Kategorie Allgemein.

The A5/1 stream cipher has been used for a long time to encrypt communication data in the GSM system. The cipher was developed in 1987 and is finally broken since 2009. The cipher was initially kept secret but became public after reverse engineering. And the simluator we created, simulates/visualises every step of the algorithm.

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IoT-Stimmungslicht mit ESP8266 steuerbar über Internet via iOS-App

Verfasst von Bastian Raschke.
Veröffentlicht am 2016-08-31 in der Kategorie ESP8266.

This article is available in more than one language.
Available translations: en

In meinem letzten Artikel habe ich bereits ein cooles RGB-Stimmungslicht mit einem Raspberry Pi und einer Web-App realisiert. Allerdings hat es mich im täglichen Gebrauch gestört, dass immer ein komplettes Linux auf dem Pi läuft, dabei unnötig 5 Watt verbraucht und das System auch nicht ohne schlechtes Gewissen schnell mal aus der Steckdose gezogen werden kann, ohne korrektes Herunterfahren. Und natürlich hat das Booten auch ca. 30-40 Sekunden gedauert. Alles in allem nicht so mega praxistauglich. Aber dann habe ich den ESP8266 kennengelernt.

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