Track 1 session 6 - st dev con 2016 - smart badge

October 4, 2016

Santa Clara Convention Center

Mission City Ballroom

Implementing a Smart

Badge/Tag with MEMS sensors

Gianmarco Ferrari

Outline

• Presenting the SmarTAG

• SmarTAG Demo Objectives

• Leveraging ST Technology / Board Description

• Running the app.

• Why NFC vs other Wireless Technologies

• Low Cost

• Low Power

• Easy Implementation

• Enhance added value

• Possible applications – Few ideas…

2

ST SmarTAG Objectives

• ST SmartTAG is a sensor node that can sense temperature, humidity,

pressure, vibration, motion and transmit the data when triggered by an NFC

reader. It can be scaled down based on requirement of several applications.

• An alternative way of connectivity for applications that:

• Are extremely low power (also full passive) and low cost;

• Require reduced BOM and fast implementation;

• Do not require real-time remote monitoring.

3

Leveraging ST Technology

What’s on the Board 5

M24LR64E

NFC Dynamic Tag

LSM303AGR

3ax Acc + Mag

LPS22HB

Barometer

HTS221

Rel. Humidity

STM32L051 MCU

EFL700

ThinFilm

battery

Pressure 260-1260 hPa

water res/ dust immune

Press acc. 6 cm

Humidity +Temperature

Hum accuracy ± 3.5% rH

Temp accuracy ± 0.5 °C

3ax Acc + 3ax Mag

Mag Full Scale 4.9mT

Offset Cancel <0.3mG/°C

ISO15693 (Type

V)

Energy Harvesting

Low power I2C

bus

Up to 64Kb NVM

Cortex®-M0

Ultra-low-power

RTC w/ calibration

Rechargeable 700µAh,

3.9V micro-battery / 150 µm

thick

Long life time (4k cycle)

SmartTag Block Diagram

M24SR64

NFC/I2C EEPROM

NFC harvester

STM32L051

MCU

HTS221

Rel.Humidity

LPS22HB

Barometer

LSM303AGR

Acc + Mag

M24LR64E

NFC/I2C EEPROM

NFC harvester

NFC

antenna

STLQ050

LDO V reg

4.2V

BAT60J

Diode

EFL700

ThinFilm

batterySTLQ015

LDO V reg

2.5V

STM32L051

MCU

HTS221

Humidity

LPS22HB

Barometer

LSM303AG

Acc + Mag

I2C

SPI 3-wire

Harvester output

Power gating through GPIO

6

SmarTAG Android App

Open the app

Device turns on the Tag, uC and

Sensors. Datalog will start

Remove Device from

SmarTAG

Data are recorder till

stopped

7

Tap Device to Tag and set the ODR

SmarTAG Android App

Select the data to

display

Device acquires data

from TagData will display

8

Tap Device / Click

Read and than View

Why NFC vs Other Wireless Tech.?

• Low Cost compared to other Wireless Technologies

• Low Power: through Energy Harvesting it enables

• Easy to implement: not design intensive

• Enhanced added values features

9

Low Cost

• Low cost ICs.

• Price varies depending on Memory size.

• Easy & Inexpensive certifications Tags are passive RF device (Unintentional Radiator

validation)

• Reduced BOM

• No external components required for tuning Only an external Antenna;

• Antenna could be a simple coil or PCB edge;

10

Operation in Full Passive Mode

• NFC Tag gets the required energy from the field generated by the reader.

• The energy harvested by the NFC Tag power the sensors and MCU.

• The lifetime of the tag is unlimited, and it requires no wired connections.

• Battery-less sensor measurements can be implemented in applications where

instantaneous measurements are required and a battery is not feasible or desired.

11

Operation in Semi-Passive Mode

• It includes an on-board power source to support tag and sensor operation.

• ST SmarTAG utilizes an ST EnFilm battery. Battery can be recharged via NFC Tag EH.

• User-controlled semi-passive sensory tags spend most of their time in a quiescent state,

in which the current drawn from the battery is negligible. Sensor Data transmission

operates in the same way as in a normal passive tag, using backscattered power emitted

by a reader.

12

Low Power Computing and Sensors

• STM32L051K6 Microcontroller ~2uA

• LSM303AGR Acc and Magnetometer ~3uA

• LPS22HB Pressure & Temperature ~3uA

• HTS221 Humidity & Temperature ~2uA

When all sensor are active, pwr budget is ~10uA

About 3X more battery life vs same architecture using BLE.

Note: ODR @ 1Hz

13

Easy Implementation

Not design intensive

• Only complexity is the antenna design

• Wired communication is established through an I2C bus

• Easy & Inexpensive certifications Tags are passive RF device

(Unintentional Radiator validation)

14

Dynamic

TagMCU

NFC/RFID I²C link

EEPROM

Memory

Vout (EH)

Enhanced Added Values

SmarTAG can also address additional functions:

• Smart Factory: PCB tracking, Process flow control, in-line customization.

• Access Control, Door Lock/Unlock, Check-in/out

• Simplified Network login

• Clone Detection

• Maintenance

• ….

15

Possible Applications

SmarTAG Applications 17

Smart Buildings/Cities:

• Environmental and Motion Data Monitoring (Smart Badge / Weather Stations…)

• Building/Constructions Structure Monitoring (Vibration alert, Pipe Leaks…)

SmarTAG ApplicationsLogistics

• Supply Chain Quality Control, from

manufacturing to the end user.

• Transportation and Storage, Handling

monitor (object dropping, vibration,…)

18

Healthcare

• Medical patches and loggers

Perishable Goods

• Expiration date alert

• Shelf/Storage Life Calculation

SmarTAG applications 19

Healthcare: Smart Clothing / Patches

• Activity

• Temperature

• Sweat

• mktg…

Animal tracking

• Activity

• Temperature

• Big data monitoring

production

• Health…

Smart Packaging

• Temperature,

• Vibration Use

• ID

• …

Automotive

• Tire Pressure

• Temperature

• Info…

And much more…

The building blocks Your need Our answer

www.st.com/stm32ode

Move / Actuate

Connect

Power

Sense

Process

Inertial modules, magnetometer

Proximity, microphone

Pressure, temperature, humidity

Bluetooth LE, Sub-GHz radio

NFC, Wi-Fi, GNSS

Energy management & battery

General-purpose microcontrollers

Stepper motor driver

DC & BLDC motor driver

Audio amplifier

COLLECT

TRANSMIT

ACCESS

CREATE

POWER

PROCESS

Software

Secure microcontrollers

Touch controller

Operation Amplifier

Accelerometer, gyroscope

Translate

Industrial input / output

STM32 Open Development Environment 20

ST NFC Comprehensive Portfolio 21

Feature-rich• 13.56MHz interface• I2C interface• Energy harvesting• 20-bit Counter• Field Detect GPO

• Up to 200 year retention• 1M erase-write cycles• From 512bit to 64-Kbit• 128-bit password

Best-In-Class memory

High volume & quality• In-house manufacturing

• Leveraging Automotive EEPROM quality

• Leveraging Consumer EEPROM volume

Standard

compliant• NFC Forum

• ISO14443

• ISO15693

Front-End

& Back-End

Manufacturing

ST25 Tags and Dynamic Tags 22

M24LR Dynamic NFC/RFID tags 23

I2C

1.8/5.5V

400kHz

ISO

15693

Long

Range

26kb/s

RF

Tag

EEPROM4 / 16 / 64 K-bit

32-bit pwd

Energy harvesting (~2V / 5mA)

Digital output (GPO for MCU wake up)

010011011100001

101010101111101

101001010011101

010101110100110

FPN8

TSSOP8

SO8

SBN12 *

Contactless InterfaceISO15693

NFC Compatible

RF range Long range, up to 100cm

RF speed 26kbps

Serial Interface I2C @400kHz

Extra featuresMCU wake-up &

Energy Harvesting

Memory format EEPROM data

Memory size 4 / 16 / 64-kbit

Data protection Password 32-bit

Temperature range -40°C to +85°C

PackageSO8 / TSSOP8 /

FPN8 / SBN12 *

Thank You