Fire Station-Smart-City-Usecase I

Written by Michael Scheuner

Fire Station-Smart-City-Usecase I

Thursday, 01 October 2015 00:00

Integration of different home automation protocols using MQTT.
In recent years, applications for home automation has become the mainstream. This has given rise to a diverse number of platforms and protocols. But what if you want to teach devices from different families to collaborate? Here MQTT lends itself as an intermediary Protocol. In an intuitive use case, we show how this is to be accomplished.

The User-Story

As an owner of a restaurant in a miniaturized smart city I would like to have more security with regard to fire hazard in my shop because my customers are very important to me and my business is my world. As soon as there is any smoke that occurs, I want the Fire Department to be notified immediately and help me as soon as possible.

Everything is still comfortable in the Smart-City!
But then it becomes dangerous - it’s burning!
Success criteria:
  • A Restaurant was built out of Lego blocks.
  • A Fire station was built out of Lego blocks.
  • A wireless – smoke detector was mounted in the Restaurant
  • An alarm light system was installed in the fire-station
  • When there is any smoke in the area, the smoke detector immediately raises an alarm.
  • In addition, a Signal is sent to the fire brigade.
  • This signal triggers the alarm light in the fire station.
The Planning

As IoT project consists of a combination of hardware and software implementation. On the hardware side, we will use:

  • A Homematic radio smoke detector (Homematic/BidCos Protocol) [1].
  • An OSRAM Lightify led strips (ZigBee Protocol) [2]
  • Two raspberry PI
  • A CCD bus-product component with CC101 868 MHz receiver for the receiver-station of the smoke detector [3].
  • A Raspbee module from Dresden electronics to communicate with the ZigBee lighting strips. [4]

On the software side, the following components are used:

  • Node.js to implement the logic [5]
  • The Debian derivative Raspian of Raspberries [6]
  • The Mosquitto MQTT broker [7]
  • The to-be-implemented architecture will have the following completely wireless design: