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22 lines
2.2 KiB
22 lines
2.2 KiB
\section{Environment}
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The home-automation projects developed by \textit{Magrathea Laboratories e.V.}\cite{maglab}, the local hackerspace in Fulda, are used to provide control over the different actors and sensors in the foundations rooms to visitors and members locally and remotely.
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The different components available (like the door status, power sockets, projectors and screens, temperature sensors, etc.) are all managed by the home-automation controller driven by the software \textit{home-assistant}\cite{HASS}.
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It provides direct control over all existing components using a web UI and allows to define rules and automations on how these components interact.
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\begin{sloppypar}
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The hackerspace has developed a common software and hardware platform for its home-automation projects called \textit{ESPer}\cite{ESPer}.
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For the hardware, boards based on the \textit{ESP8266} micro-controllers, mostly \textit{ESP-01s}\cite{ESP-01s} boards, are used in combination with self-developed power supplies and use-case specific hardware components.
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\end{sloppypar}
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These boards provide a Microcontroller Unit (MCU) fast enough for all required scenarios and integrate WiFi without requiring any extra components.
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The software is based on the \textit{Sming}\cite{Sming} library, which in turn is based on the open source SDK for \textit{ESP8266} and integrates a lot of other software components for easy use.
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To build the software, a \textit{Makefile}\cite{make} is used, which provides a simple way for reproducible builds.
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For communication with the controller, the \textit{MQTT}\cite{MQTT} protocol is used.
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It provides a lightweight messaging mechanism implementing the publish-subscribe pattern that allows devices to listen for commands and publish their current state to the controller and other interested parties.
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The controller software has out-of-the-box support for this protocol, which allows easy integration of all different device types using the same patterns.
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The components all share the same configuration in regard to the network access and the controller to communicate with.
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The configuration is provided during build time, which eschews the need for a configuration interface and reduces the management overhead, thus minimizing security leaks.
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