© 2014 Samsung Developer Conference. All rights reserved. www.samsungdevcon.com Developing for Simband Insight into Building Breakthrough Sensors Jim Schuessler Andrea Trasatti

© 2014 Samsung Developer Conference. All rights reserved. www.samsungdevcon.com 2 • Simband hardware overview  Mechanical  Electrical • Simband software overview  Sensor data  Visualize data  Live demo  SAMI integration • Working with Simband, working with us • Q&A

© 2014 Samsung Developer Conference. All rights reserved. www.samsungdevcon.com Developing for Simband Hardware overview Jim Schuessler

© 2014 Samsung Developer Conference. All rights reserved. www.samsungdevcon.com 4 Inside Simband • Base unit provides the “infrastructure” to support a wide variety of sensor modules  Communications to SAMI  User interfaces  Internal power and data interfaces • The “Bucket” is the mechanical and electrical interface to sensor modules Simband is a modular PLATFORM Base Clasp The Bucket Active Band

© 2014 Samsung Developer Conference. All rights reserved. www.samsungdevcon.com 5 Simsense Reference sensor module at the anterior side of the wrist Samsung’s Reference Sensor Module: Simsense Photo Plethsmography (PPG) Bio-impedance (BioZ) Galvanic Skin Response (GSR) Accelerometer Skin Temperature Electro-cardiogram (ECG) All time synchronized

© 2014 Samsung Developer Conference. All rights reserved. www.samsungdevcon.com 6 Simsense • Sensor position designed with anatomy in mind  Optical sensors over ulnar artery • Multiple channels of photo- plethysmography (PPG) • Colors tend to reflect at different depths  Bio-Impedance (Bio-Z) targets the radial artery  Active clasp closes ECG loop • Finger touch from opposite hand Reference sensor module at the anterior side of the wrist Radial artery Ulnar artery

© 2014 Samsung Developer Conference. All rights reserved. www.samsungdevcon.com 7 Mechanical Construction • Athena = active sensor layer  Flexible PCB with electrodes, optical elements and other sensors • Apollo = front-end processing electronics  Over 600mm2 surface area available Materials and Assembly Stack-up

© 2014 Samsung Developer Conference. All rights reserved. www.samsungdevcon.com 8 Powerful processing resources 1. Dual processor architecture  Bio-processor front end (M0)  Floating point, secure backend (M4F) 2. Serial Peripheral Interconnect (SPI) Data Interface + Interrupt line from Sensor Module to Base Unit + Reset line from Base Unit to Sensor Module 3. Battery power from Base Unit Versatile architecture offers power optimization Full System Diagram

© 2014 Samsung Developer Conference. All rights reserved. www.samsungdevcon.com 9 Simple, Standard Electrical Interfaces • SPI is available on every MCU in the world  Easy to develop for • Bandwidth  We use 2Mb/s • ECG lead 2 from clasp SPI and direct battery power The Bucket Simband S_MOSI S_MISO S_CLK S_RST S_INT S_CS ECG2 Res.(3) V+ GND Sensor Module Connector Host System Band Flex Cable

© 2014 Samsung Developer Conference. All rights reserved. www.samsungdevcon.com 10 Power Interface • Essentially? How direct?  Coulomb counter monitors SM power usage  Switch allows Base Unit to control SM power • Limits are a balance between SM freedom and safety to Base Unit  100mA peak  50mWhr (averaged over 24hrs.) Essentially a direct connection to the battery Base Unit Sensor Module

© 2014 Samsung Developer Conference. All rights reserved. www.samsungdevcon.com 11 Q & A Jim Schuessler [email protected] @Jim_Schuessler

© 2014 Samsung Developer Conference. All rights reserved. www.samsungdevcon.com Developing for Simband Software overview Andrea Trasatti

© 2014 Samsung Developer Conference. All rights reserved. www.samsungdevcon.com 13 Designed to support different data from different sensors

© 2014 Samsung Developer Conference. All rights reserved. www.samsungdevcon.com 14

© 2014 Samsung Developer Conference. All rights reserved. www.samsungdevcon.com 15 Sensor data • We define the data coming from each sensor as a stream • Each stream has a set of characteristics that depend on the sensor and the data it generates • Everything is time-coded and synchronized

© 2014 Samsung Developer Conference. All rights reserved. www.samsungdevcon.com 16 Blood pressure Algorithm gettimestamps send Writing an algorithm

© 2014 Samsung Developer Conference. All rights reserved. www.samsungdevcon.com 17 Data streams • Heart rate • Heart rate variability • Blood pressure • Confidence Indicator • Steps (increments) • Steps (daily) • Activity (walking, running, etc.) Simband streams from algorithms

© 2014 Samsung Developer Conference. All rights reserved. www.samsungdevcon.com 18 Confidence Indicator • Rate the curve of the signal from 1 to 4 • Analyze the stream and compare with our model All streams from Simsense are graded Grade Definition 4 All features visible, very low noise 3 Key features visible, low noise 2 Marginal, noisy 1 Anomalies and a lot of noise

© 2014 Samsung Developer Conference. All rights reserved. www.samsungdevcon.com 19 Confidence Indicator Confidence Indicator 1 Confidence Indicator 4

© 2014 Samsung Developer Conference. All rights reserved. www.samsungdevcon.com 20 Who wants to see a live demo?

© 2014 Samsung Developer Conference. All rights reserved. www.samsungdevcon.com 21 Simband <3 SAMIIO

© 2014 Samsung Developer Conference. All rights reserved. www.samsungdevcon.com 22 Working with Simband, Working with us • Yesterday we officially opening our ecosystem to the world • Our agenda is very simple: work together to build a better digital health platform • Simband source code will be available to everyone

© 2014 Samsung Developer Conference. All rights reserved. www.samsungdevcon.com 23 Let’s keep talking Read about Simband at http://www.voiceofthebody.io Andrea Trasatti – @AndreaTrasatti Jim Schuessler – @Jim_Schuessler Follow us on Twitter @voiceofthebody