FHEM as IoT platformThilo Röhl 3-2016, www.pkienthusiast.com

Motivation• Everyone has a smartphone, no one knows how to create things or

develop software• First Generation of Apple being garage builders• Smartphone and tablets create a out of the box• No expertise with making things, creating things• Even computer science students tend to have virtual expierience

The Rasberry Pi• Invented for School people to educate programming• Project founded in UK• Roughly sold 5 Millions (2013)• Production in UK – moved back from China• Non Profit Organisation • Open Design• Low Power, about 12 € for a whole year

Operation System • Linux• Open Source• Invented by Linus Torvalds et al

FabLabs• Open laboratories to fix things• People want to understand how things work rather than buying new

things• The makers build their own systems• Connection and building own things• Open space, non profit

AirPi• Created by a group of english pupils • Sensors for air quality, sound, light• Sourcecode freely available is now

maintained by a english chemistryphd student• You get it in single parts to solder

it yourself• Nonprofit

AirPi delivery

Adafuit LCD Display• A simple display to solder for yourself including a plate, an LCD display

and 5 small buttons• Tutorials with pictures on the webpage how to solder it. Source code

to use the display is freely available

Ardafruit LCD Template Delivery

FHEM• Created by Rudolf König / Germany in 2005• Perl script to be used for home automation, GPL open source• Module based system, module maintained by anyone active on the

forum• Very active community• Independent of cloud or networks

Sensors, Events, Actors• FHEM connects Sensors with different modules creating inside events

using triggers to start actors• Any Sensor can be freely connected to any Actor• The perl language allows regular expressions and powerful

combinations• Local scripts can be executed or web services called• FHEM instances can be connected to allow a distributed model• It is possible to connect devices over many different wired or wireless

protocols e.g. KNX, EIB, Homematic, GPIO of the rasberry pi

Z-Wave• Wireless protocol supported by a alliance of vendors• Z-Wave creates a „secure“ mesh network• Examples are smoke detectors, water detectors,

wall plugs with sensors and logic

Enocean• Alliance of couple of vendors, based in Munich• Focus on low-power design• Switch using the energy of the movement of the finger• Temperature or window opener use the light

Bluetooth LE• New devices in the market, mainly

for smart phone connections can beinterconnected with FHEM

ZigBee• Used for Philips Hue Lightning, Osram Lightfy• Tendencies to unfollow open standards• Security issues according heise *

*http://www.heise.de/security/meldung/Deepsec-ZigBee-macht-Smart-Home-zum-offenen-Haus-3010287.html

If you cannot decide…• Chose an open system !• FHEM is able to integrate them all

• Consider Home Automation as a journey. Step by step integration, avoid buying island solutions

Base Setup of Rasberry Pi• Basis setup of pi• sudo apt-get update• sudo apt-get upgrade• sudo raspi-config

• to expand file-system and to setup localisation/keyboard• date –s „03/08/2016 12:30“

• to setup time. The pi has no clock – use ntp if possible• In some cases, a kernel update using „sudo rpi-update“ might be necessary. I

had to turn of the device tree using raspi-config to get some device back working. Do only do this if really necessary

Base setup of FHEM• http://www.fhemwiki.de/wiki/Raspberry_Pi • wget http://fhem.de/fhem-5.7.deb• sudo dpkg -i fhem-X.Y.deb

• Start browser to access local system 127.0.0.1:8083• Access is possible over smartphone, table and with VPN even remote

First update• FHEM does not support a proxy for updating• Put update in the command line• Current perl modules will be download• „update“ in the browser window• „shutdown restart“• „backup“

The power of the community• Users contribute freetime to help others. www.fhem.de• Resulting scripts are shared and further improved and finally

integrated in FHEM• They are all having a lot of fun and are creating a deeper

understanding of IT• Access to basic concepts of IT concepts for the whole community

Dummy• http://www.fhemwiki.de/wiki/Erste_Schritte_in_fhem • A state variable• define mySchalter1 dummy• attr mySchalter1 room Schulungsraum

Readingsgroup Battery Status• define battStatus readingsGroup .*:[Bb]attery• All Readings with Battery or Battery from all Devices• Get connectivity overview

Dummies with with symbols and colors• Dummies for alarms, Symbols, On/Off button

Zwave battery powered outside sensor• Temperature, Humidity, Lux, Movement

Plotting Outside Temperature/Humidity

Readingsgroup Weather Readings

Plotting System load – 900 Mhz Throtteling

Plotting Bluetooth Presence

notify• Notify triggers because of an event. • A notify can trigger an SMS over a USB SIM Stick or a pushover app

message or an email

• define b3lampV1 notify btn3 set lamp $EVENT• define b3lampV2 notify btn3 { fhem "set lamp $EVENT" }• define b3lampV3 notify btn3 "/usr/local/bin/setlamp "$EVENT"“

• define n_mySchalter1_on notify mySchalter1:on set myLampe1 on

at• At triggers something depening on a time

• define a1 at 17:00:00 set lamp on # fhem Befehl• define a2 at 17:00:00 { Log 1, "Teatime" } # Perl Befehl• define a5 at +00:00:10 set lamp on # Start in 10 secs• define a12 at +*{sunset_rel()}

{ fhem("set lamp on-till 23:00") if($we) } # Only Weekends before sunset

Notify for Smoke Alarm

Combine any input with any output• Everything in FHEM can be combined regardless of the proctol

connecting to the outside• If you are not satisified with a current solution, integrated you own

and show the example to the community

Combine Cloud Services• Use the cloud to archive data, visualise data, trigger actions• Useful when you need more power, more storage or a long term data

qualitiy• Examples are ubitdot as general IOT data collector, netatmo as

weather service, Amazon as storage provider or Pushover as mobile messaging service

Create installation short manuals• E.g. Freeradius base config• apt-get install freeradius libfreeradius2 freeradius-common freeradius-utils• Installs packages, depening packages, start scripts (service freeradius start/stop) and start the service

• add new client to :

• /etc/freeradius/clients.conf

• client 192.168.1.0/24 {• secret = radiustest• shortname = Testnetz• }

And no go ahead and play with it • Rasberry Pi Setup

• https://www.raspberrypi.org/documentation/installation/installing-images/

• Zwave• Example devices taken from www.fibaro.com, www.aeotec.com, www.popp.eu

• Enocean• Example devices taken from www.nodon.fr

• Bluetooth• Example devices taken from www.parrot.com/flowerpower, www.playbulb.com