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20 lines
2.1 KiB
20 lines
2.1 KiB
\section{Environment}
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The home-automation projects developed by \textit{Magrathea Laboratories e.V.}\autocite{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, etc.) are all managed by the home-automation controller driven by the software home-assistant\autocite{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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The hackerspace has developed a common software and hardware platform for its home-automation projects called \textit{ESPer}\autocite{ESPer}.
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For the hardware, boards based on the ESP8266 micro-controllers, mostly ESP-01s\autocite{ESP-01s} boards, are used in combination with self-developed power supplies and use-case specific hardware components.
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These boards provide a MCU fast enough for all required scenarios integrate WiFi without requiring any extra components.
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The software is based on the Sming\autocite{Sming} library, which in turn is based on the open source SDK for ESP8266 and integrates a lot of other software components for easy use.
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To build the software, a Makefile\autocite{make} is used and provides a simple way for reproducible builds.
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For communication with the controller, the MQTT\autocite{MQTT} protocol is used.
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It provides a lightweight messaging mechanism implementing the publish-subscribe pattern which 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 of 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 thus reducing the manage overhead and increases the security.
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