The document discusses a home automation system built with a Raspberry Pi and various technologies including FHEM, Redis, Logstash, Elasticsearch, and Kibana. It outlines the hardware and software stack, detailing each component's functionality and features. Additionally, it addresses cost considerations and raises concerns about security and social implications.

1. monitoring
Home automation with Perl
Raspberry Pi, 868MHz, FHEM, Redis, Logstash , Kibana and
Elasticsearch

2. The hardware
▪ Raspberry Pi
▪ COC (868MHz)
▪ JeeLink
▪ FS20
▪ Homematic

4. The software stack
▪ FHEM (perl!)
▪ Redis
▪ Logstash
▪ Elasticsearch
▪ Kibana

5. What is FHEM
▪ Home automation system
▪ Written in Perl
▪ Badly documented (mostly German)
▪ Great auto-configure functionality
▪ Has web interface and Android app

6. What is Redis
▪ An advanced in-memory key-value data store.
▪ FAST!!
▪ Durable (configurable disk-write)
▪ Single-threaded
▪ Lots of fancy features (lists, hashes, sets)
▪ Very well documented
▪ Great perl module
▪ Not very scalable… master-slave possible

7. What is Logstash
▪ A tool for managing events and logs
▪ Primarily an interface - between sources (redis, files, pipes, …) and
storage (elasticsearch, mongodb, email, …)
▪ Lots of very helpful filters (date, grok, geoip, …)
▪ Horizontally scalable
▪ Fantastic community “If a newbie has a bad time, it’s a bug”

8. What is Elasticsearch
▪ Elasticsearch is a search server based on Lucene
▪ Very easy to set up
▪ Very horizontally scalable
▪ Written in Java…
▪ Great RESTful API
▪ Great perl module written by the developers themselves
▪ Needs BIG hardware (500 million events/day: 132GB RAM, 16 cores)
▪ Stability….. :-/

9. The costs (so far…)
Device
Unit cost
Total
RPi + Power + SD card
50
50
COC 868MHz
75
75
JeeLink v3 868MHz
32
32
EM1000 power monitor
34
68
PCA301 remote socket with power monitor
34
34
HMS100TF remote thermometer/hydrometer
25
50
Total
309

10. Concerns
▪ Security for actuators
▪ Social implications – Big Brother
▪ Catastrophic Corner Cases

11. Questions…?

12. Links
▪ FHEM
http://fhem.de/fhem.html
▪ Redis
http://redis.io/ (The little Redis book)
▪ Logstash
http://logstash.net/
▪ Elasticsearch
http://www.elasticsearch.org/
▪ ELV Elektronik
http://www.elv.de/
▪ Busware
http://busware.de/
▪ Raspberry Pi
http://www.raspberrypi.org/