Smart classroom

Group Name: Skynet

Group Members:

Name	Student number
Hannes Hietanen	0403053
Severi Ahopelto	0454293
Md Anisul Islam	0528721

Problem

LUT has multiple computer rooms available in 24/7 use. These classrooms have their computers on hibernation all the time they are not in use, which uses power needlessly.

This issue could be solved using smart solutions.

Vision

A classroom with no power usage when not in use

The room should still be immediately usable after someone has entered in

Power usage should fall down to zero when the last person leaves the room

Implemented scenario

Calculating power consumed by all idle electronic devices and Recognizing the motion → Turning ON/OFF power supply

Situational lighting based on Power consumption

Energy savings calculations

There are ~16 computers in a computer room

Approx. 1-5 watts power draw per computer in hibernation mode

Classrooms are not in use most of the day (we could have 12h not in use time)

12h*4W*365 = 17520 Wh = 17.5 kWh (1 computer in a year)

Per computer room 17.5kWh * 16 = 280 kWh in a year

Only from the computers

Benefits and savings

Actual power savings are relatively small

Emphasis on branding

One possible solution as a part of green campus idea

Automatic solution

Extended vision

Smart Windows

Automatic dimming of windows

Generating some power from sunlight

Smart Walls

Accurately detecting people inside the room

Using any wall as an interactive surface with a projector

No need for wall switches, interactions done touching the wall

Smart Heating

Heating times based on classroom use

System is aware of the school schedule

Home Automation Protocol - X10

X10 was developed in 1975 in Scotland

Uses power lines to transmit data

Has been an international standard for home automation for a long time

Communicates between transmitters and receivers

RF bursts over power line

A 1ms burst of 120 kHz is Binary 1 and absence of 120 kHz is Binary 0

Complete code transmission is 11 cycles

Bits are sent in half cycles of the power line (1ms signal on one half cycle)

First 2 cycles are a default Start code 1110, which is always the same

Next 4 cycles indicate the house code

Last 5 cycles represent a Number Code or a Function Code

image: www.x10.com/x10-basics.html

Benefits

Uses existing wiring (no need for ethernet or wireless networks)

Simple to use

Been around for a long time so there are many compatible devices

Cheaper than most alternatives

Drawbacks

Noticeable delay

Possible interference (data byte gaps etc.)

Provides less functionality than alternatives

16 home addresses and 16 unit codes per address so only 256 different addresses

FHEM

Open source Perl server for home automation

Common tasks include switching devices and logging events

Supports many protocols and devices

Our impressions

Flexible and extensible

Built-in regular expressions are useful

Can be controlled with many devices, such as smartphones

Very limited English documentation and support

Poster

Documents

Presentation:smart_classroom_final.pptx

Final report:

Code: code.zip

Poster: homeautomation2018:group6:automation_poster_small.png