Bastian Raschke
Nils Tegetmeyer

Sicherheitskritisch

Ein Blog über IT-Sicherheit und Technik

CAN bus (AsysBus) component for smart home system "Home Assistant"

Verfasst von Bastian Raschke.
Veröffentlicht am 2018-05-20 in der Kategorie Smart Home.

The AsysBus software was developed by Florian Knodt and was originally derived from a software called iSysBus. Basically the AsysBus is a firmware for AVR devices (e.g. the Arduino platform) to create a cheap and robust classic bus network for embedded devices. The communication is realized via CAN bus that is mostly popular in automotive industry. So you can easily create cheap nodes to control lights, RGB(W) light strips, wall buttons or any other possible device to interact with your smart home.

But without integration of my other smart home components (e.g. my Philips Hues) that system would not make a lot sense for me. So i created a component to use AsysBus in the popular smart home software Home Assistant.

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Improved glowboard (DIY) based on original Pennyboard 27" Blackout

Verfasst von Bastian Raschke.
Veröffentlicht am 2018-05-15 in der Kategorie Skateboard.

My previous Pennyboard project worked quiet well. But it was not perfect, so i finally build a complete new board:

I liked my previous Ridge mini cruiser pretty well. It was lightweight, small and looked amazing with the underglow LED light. But the quality of the board itself was not perfect (especially the trucks, wheels and the bearings). Okay for a price of around 50€ it was pretty amazing but i wanted a bit better...

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LED design mirror (DIY) using ZigBee controller from cheap Ikea Trådfri

Verfasst von Bastian Raschke.
Veröffentlicht am 2018-04-15 in der Kategorie Smart Home.

When i moved to my new apartment, i bought a lot of new things to feel comfortable in my new home. But for my bathroom i got an old mirror from my parents for free. The raw mirror looked a bit unimpressive. So i pimped it to a nice looking design LED mirror which is also compatible with the Ikea Tradfri smart light system.

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Professional electric cruiserboard (DIY) controlled with modified Wii Nunchuck

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

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 Smart Home.

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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