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Hacking the room

LunaConf

With Raspberry Pi’s

LunaConf

Willem Jan Glerum, Lunatech

17-01-2020

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LunaConf > Hacking the room with Raspberry Pi’s

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  1. Raspberry Pi’s and my experience
  2. Gathering sensor data
  3. Processing sensor data
  4. Visualizing sensor data
  5. Next steps

LunaConf > Hacking the room with Raspberry Pi’s

Table of Contents

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  • Little low cost device
  • ARM based
  • Quite powerful
  • Full OS

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Raspberry Pi’s

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  • Controlling the lights at home
    • With a simple relay switch
    • Copying radio signals for wireless switches
    • Zigbee (Philips Hue integration)
    • Google Assistant integration with IFTTT and custom API’s
  • Gathering sensor data
    • Simple sensors like DHT22 (temperature and humidity)
    • Electricity meter (over a serial connection)
    • External sources (weather, thermostat, etc)

My experience with Raspberry Pi’s

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  • Simple, cheap sensor
  • Read sensor with Python (lot’s of support)
  • Reformat the data
  • Push over a message bus

Getting sensor data

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Pipeline overview

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  • Technologies
    • Scala
    • Play
    • Akka
    • MQTT
  • Push based over MQTT
    • At most once (0)
    • At least once (1)
    • Exactly once (2).

Processing data

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  • Fetch data from external API’s
    • Weather data
    • Thermostat data
    • …
  • Technologies
    • PlayWS
    • PlayJson

External data sources

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Pipeline overview

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  • No need to build a full frontend

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  • Technologies
    • InfluxDB
    • Grafana

Visualizing data

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  • Build everything in containers

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  • Locally
    • docker run
    • docker-compose
  • “Production”
    • docker-compose
    • k8s

Running all the systems

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  • Now that we have all the data, we can
    • Compute trends
    • Do predictions
    • …
  • Technologies
    • Spark
    • TensorFlow
    • ...

Prediction

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Slide

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Slide

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  • Device tracking with Bluetooth and WiFi
  • Machine learning and prediction
  • Control the doors
  • Control the climate
  • ???

Next steps

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  • Alternatives for a Raspberry Pi

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  • For example:
    • Arduino
    • Banana Pi
    • Odroid
    • NodeMcu

Alternatives

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  • ARM (64bit) based software
    • Docker containers
    • Linux distributions
    • Kernel (modules)
  • (cheap) SD cards
  • Time consuming

Challenges

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  • Not expensive
  • Easy to get started
  • Rapid prototyping
  • Learn!
  • Fun!

Conclusions

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LunaConf > Hacking the room with Raspberry Pi’s

Thanks!

Willem Jan Glerum, Lunatech

17-01-2020

github.com/wjglerum

willem-jan.glerum@lunatech.com

twitter.com/wjglerum