|This is a construction to tell the world if the hackerspace is open.|
The space state enables visitors of the hackerspace to know whether the space is open. The state can be checked by various means: an image on the website, spaceAPI, an email alert, or a light outside the space's door.
The space state is set manually using a scissor switch in the space. When engaged the switch closes two circuits (double pole, single throw). One of them is a 12V DC circuit that lights up our logo and doorbell outside. The second pole is connected to a utp pair that runs back to the server cabinet, where an arduino reads out whether the switch is closed. A server polls the arduino every minute and sends out emails, changes the picture on the front page and updates the space api. The source code can be found on github
- Add some relays to the open state, to prevent stand-by power consumtion (arround 40W at the moment).
- Add some more sensors to the arduino to monitor space stats (humidity, temperature, number of times the bel rang, ...)