20140508 quantified self droidcon

www.medando.de

Quantified Self Android Apps for Self Tracking with Wearables and Health-Monitoring Devices Andreas Schreiber <andreas.schreiber@medando.de>

Droidcon Berlin, 08.05.2014

www.medando.de Droidcon Berlin 2014, 08.05.2014

My Humble Self

Scientist, Head of department

Co-Founder, CEO

Co-Founder

My Self Tracking

• With sensors

• With smartphone apps

Source: SAT.1/Weckup, http://bit.ly/10CEfUX

What is The Quantified Self?

Self-knowledge through numbers

• Analyze trends and set goals to improve yourself

Recording of daily activities

• Fitness, sleep, location, …

• Monitoring and display of information from various devices, services, and applications

Other Terms

• Self Tracking

• Life Hacking

• Life Logging

• …

Google Trends: “Quantified Self”

Quantified Self Meetups

http://quantified-self.meetup.com

Objects of Tracking

Wearable Sensors, Devices, and Apps

Technologies for Self-Tracking

Mobile phonesand apps

Web- anddesktop

applications

Self-trackinghardware

Self-madedesktop tools(spreadsheets

Pen and paper Other

Deployed technologies for self-tracking

Source: Marcia Nißen, Quantified Self – An Exploratory Study on the Profiles and Motivations of Self-Tracking, Bachelor Thesis (2013)

Steps (Fitbit)

Weight (Withings)

Stress (W/Me)

Sleep (Sleep as Android)

Blood Pressure (BloodpressureCompanion)

Activity & Location (Moves)

Source: WDR/Servicezeit, http://bit.ly/DigitaleSelbstvermessung

Activity & Location (Moves)

Car (Dash)

Mobile Phone Usage & Well-being (Menthal)

WeightCompanion

Analysis: Blood Pressure vs. Weight

Sharing

Connecting Devices & Apps

The Internet of Things

Internet of Things

Billions of devices, sensors, and chips

• Connected physical objects (devices)

• Embedded controllers, sensors, actuators

• Connected via the internet

• Uniquely identified

• They interact

Growth

Number of devices connected to the internet grow every day

50.000.000.000 “Things” by 2020

Communication

Internet of Things

Communication infrastructure

MQ Telemetry Transport

• Machine-to-machine (M2M) connectivity protocol

• Publish/subscribe messaging

• Expect unreliable networks with low bandwidth and high latency

• Expect clients with limited processing resources

• Provides Quality of Service, if network allows

• Easy to implement

MQTT Broker

MQTT broker

Client

publish

subscribe topic/subtopic

(optional) bridge

Client

MQTT Protocol

• One-to-many message distribution over TCP/IP

• Notifies if clients disconnect abnormally

• Message format

• Fixed 2-byte header

• Variable header for some message type

• Payload (e.g., the topic or small pieces of data)

MQTT Topics

• Messages in MQTT are published on topics

• No need to configure, just publish on it

• Topics are hierarchical, with “/” as separator

my/home/temperature/kitchen my/home/temperature/livingroom my/server/temperature

MQTT Implementations

Server/Broker • Mosquitto • Eclipse Paho • IBM Websphere MQ • RSMB • MQTT.js • Apache ActiveMQ • RabittMQ • HiveMQ

Client Libraries for • C/C++ • Java • Python • Perl • PHP • Ruby • …

http://mqtt.org/wiki/software

Open Source Broker Mosquitto

Implemented in C. Fast. Small.

For testing: Publicly available Mosquitto MQTT broker

Subscribe

import import paho.mqtt.client as paho def on_message(mosq, obj, msg): print(msg.topic + ' ' + str(msg.payload)) mqtt_client = paho.Mosquitto() mqtt_client.on_message = on_message mqtt_client.connect('test.mosquitto.org') mqtt_client.subscribe('#', 0) # all topics return_code = 0 while return_code == 0: return_code = mqtt_client.loop()

Publish

import paho.mqtt.client as paho mqtt_client = paho.Mosquitto() mqtt_client.connect('test.mosquitto.org') mqtt_client.publish(‘droidcon/demo', 'hello world', 1)

MQTT on Android

Eclipse Paho (http://www.eclipse.org/paho)

import org.eclipse.paho.client.mqttv3.MqttClient; import org.eclipse.paho.client.mqttv3.MqttException; import org.eclipse.paho.client.mqttv3.MqttMessage; . . . client = new MqttClient("tcp://localhost:1883", "myJavaClient"); client.connect(); MqttMessage message = new MqttMessage(); message.setPayload("Hello World".getBytes()); client.publish("droidcon/demo", message); client.disconnect();

Android Push Notifications

Getting data from Quantified Self gadgets to Android

• The Gadget sends data to “somewhere” in the Cloud

• Withings, Fitbit, etc. provide APIs to access the data

• Register for callbacks to get notifications

• We use a Django app that registers as callback listener and send MQTT messages on updates

• MQTT Java client on Android receives notifications

MQTT Push Notification Architecture

Django App

MQTT broker

Gadget Vendor

Gadget

Android phone

publish notification

measure- ments

register phone

register callback receives callbacks

send messages

Implementation & Deployment

• Implementation includes OAuth stuff

• Most complex part was the Java code on Android (error handling etc.)

• Deployment on Amazon Web Services

Django/Mosquitto

EC2 instance

User/Device registry

Withings

Elastic IP Amazon

CloudWatch Alarm

SNS developer@medando.de

Callback Implementation (Withings)

def callback(request): """ Callback function for Withings notifications. """ . . . # request parameter handling devices = RegisteredWithingsUser.objects.filter(user_id=user_id) mqtt_client = MosquittoHandler(len(devices)) for device in devices: device_id = device.device_id mqtt_topic = 'medando/weightcompanion/weights/%s/%s' % (user_id, device_id) payload = simplejson.dumps({'startdate': startdate, 'enddate': enddate}) mqtt_client.publish(mqtt_topic, payload, 2, True) mqtt_client.wait()

MQTT Messages

medando/weightcompanion/weights/1883073/34bae8cbe8dd92f3 0 {"startdate": "1371856646", "enddate": "1371856647"} medando/weightcompanion/weights/1791607/898efc38ac5d4211 0 {"startdate": "1372742400", "enddate": "1372742401"} medando/weightcompanion/weights/1527601/2ebcf034b8585668 0 {"startdate": "1368851117", "enddate": "1368851118"} medando/weightcompanion/weights/16121/f2a8ca66fd067954 0 {"startdate": "1372750563", "enddate": "1372750564"} medando/weightcompanion/weights/449599/4d701e076912648f 0 {"startdate": "1372751111", "enddate": "1372751112"} medando/weightcompanion/weights/642578/b33356881163a389 0 {"startdate": "1370585275", "enddate": "1370585276"} medando/weightcompanion/weights/2019258/33b1d416aeaec9ef 0 {"startdate": "1371377131", "enddate": "1371377132"} medando/weightcompanion/weights/2019258/61bdf242b37d8a29 0 {"startdate": "1371377131", "enddate": "1371377132"}

medando/weightcompanion/weights/2019258/61bdf242b37d8a29 0 {"startdate": "1371377131", "enddate": "1371377132"}

Notification on Android

Status Page

Sending MQTT from Android

WeightCompanion

• Experimental feature

• User defines MQTT topic

• Weight as Payload (JSON)

{ "unit":"kg", "weight":80.1 }

Conclusions

• Quantified Self community is growing

• Many devices and apps

• Mobile! Wearable!

• Communication in the IoT

• Messaging with MQTT

• Platform independent push notification services

Source: Kölner Stadt-Anzeiger, http://bit.ly/JsnQ3s

Questions?

Andreas.Schreiber@medando.de

@MedandoDE | @onyame

20140508 quantified self droidcon

2014 google trends

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