TI Bluetooth® low energy

Getting Started with the Technology, February 2013

Presenter’s Name

1

Agenda

What is Bluetooth low energy?

Demo of CC2541DK-SENSOR

Getting Started with TI Bluetooth low energy

Evaluation of CC2541DK-MINI

2

What is Bluetooth low energy?

3

What is Bluetooth low energy

• Part of Bluetooth 4.0

• Wireless Personal Area Network technology

• Target Applications:– Low Power – Low Latency– Low Throughput

• Spread Market and Application Areas– Entertainment, Sports & Fitness – Home Automation, Security & Proximity– Medical, Industrial & Automotive

4

Slave

Master

Slave

Slave

Bluetooth Branding

5

ClassicDual ModeSingle Mode

[Mbps]50

3

1

11

6

1

Bluetooth low energy vs WiFi/BT

6

WiFi

BLEBT

BLE WiFiLi-Ion

AAA

CoinCell

Smallest Power Source Required

Technology

WiFi

BLEBT

Maximum Throughput(Symbol rate)

Technology

Connection Events

• All communication between two connected devices occur duringConnection Events – Occur even when one (or both) sides have no data to send– Occurs periodically

7Sleeping

Connection Events

time

Current draw[mA]

Sleeping

Bluetooth low energy Device Roles• A Bluetooth low energy device can operate in four profile roles:

– Peripheral • An advertiser that is connectable • Operates as a slave in a connection• Example: Heart Rate Sensor

– Central• Scans for advertisements and initiates connections• Operates as a master in connections.• Example: Smartphone

– Broadcaster• An advertiser that is non-connectable• Example: Temperature Sensor

– Observer• Scans for advertisements, but cannot initiate connections• Example: Temperature Display

8

Heart Rate Profile

Profiles and Services

• A Profile defines and describes the use of Services necessary to implement a given Application

• Bluetooth SIG adopted examples:– Heart Rate Profile

• Heart Rate Service (HRS)• Device Information Service (DIS)

– Proximity Profile• Link Loss Service• Immediate Alert Service

– Find Me Profile• Immidiate Alert Service

9

Profile

Service

Characteristic

Properties

Value

Descriptor

Characteristic

Properties

Value

Descriptor

...

HRS

Measurement

Notify

98

User. Disc.

GATT = Generic Attribute Profile

DIS

System ID

Read Only

XX ... XX

User. Disc.

GATT Architecture

• GATT specifies the structure in which data is stored and exchanged.• Servers have data, which are exposed using characteristics.• Clients want to use this data

10

Server

Client Requests or Commands

Responses

Service

Characteristic

Characteristic

…

Service

Characteristic

Characteristic

…

Demo of CC2541DK-SENSOR

Apple iPad connected to Texas Instruments SensorTag

11

Demo: Bluetooth low energy SensorTag

12

CC2541

IMU-3000Rotation

KTXJ9Acceleration

MAG3110Magnetic Field

SHT21Humidity

T5400Pressure

TMP006Temperature

Push Buttons

LEDs

I2C

Central Device– Master + Client (wants data)

Peripheral Device– Slave + Server (has data)

Sensor Data

Configuration

Getting Started

With Texas Instruments Single Mode Bluetooth low energy

13

Order Kit and Download SDK

14

Order Kit

Download SW Stack

Evaluate and LearnBluetooth low energy

Order Kit

Download

• Visit ti.com/ble

Two-Chip Solution(Network Processor)

One-Chip Solution

TI Bluetooth low energy Hardware

15

CC2540Flash SoC

USBHigher Output Power

CC2541Flash SoC

I2CPower optimized

RadioProprietary Mode

MCUSerial

Application + Profiles BLE StackBLE Stack + Application + Profiles

CC2540CC2541

CC2540CC2541

Two ways of using TI Bluetooth low energy

TI Bluetooth low energy Hardware

16

CC2540DK-MINICC2541DK-MINI

The easiest way of evaluating

Bluetooth low energy

CC2540DKCC2541EMK

Advanced kit with several peripheral interfaces and

features

CC2541DK-SENSOR

Targeting smartphone App developers. The SensorTag provides sensor data from six

sensors

CC2541DK-RC

The Remote operates as a mouse, keyboard and consumer remote

using HOGP

Development Kits

CC2540Flash SoC

USBHigher Output Power

CC2541Flash SoC

I2CPower optimized

RadioProprietary Mode

TI Bluetooth low energy Software Solution• Full Protocol stack for single mode Bluetooth low energy solution

available at ti.com/ble-stack (Royalty Free)

• Complete power optimized stack including controller and host– Device Roles: Central, Peripheral, Observer or Broadcaster– GATT – Client and Server– Security Manager – 128 bit AES Encryption and Decryption

• Sample applications and profiles– Generic applications for all GAP roles and supported profiles.

– The latest adopted SIG Profiles and example Proprietary Profiles– Over the Air Download (OAD)

• Fully certified solution– TI BLE Controller Subsystem – TI BLE Host Subsystem – TI BLE Profile Subsystem

17

TI Bluetooth low energy Software Solution

18

Apps

Stack

Application

Generic Access Profile

Generic Attribute Profile

Attribute Protocol Security Manager

Logical Link Control and Adaption Protocol

Link Layer

Physical Layer

HCI

Other ProfilesGAP Role GATT Service ...

OSAL

HAL

Source

Library

OSAL = Operating System Abstraction Layer (Prioritized task handling loop)HAL = Hardware Abstraction Layer (Drivers and API for LEDs, Buttons etc)Full API to access all stack functionality in the stack (Library) from the Application and Profiles

TI Bluetooth low energy Tools

• BTool– Run and test all possible Bluetooth

low energy functionality controlled from the PC tool.

• BLE Device Monitor– Provides an intuitive and graphical

way to explore Bluetooth low energy Services and Characteristics.

• SmartRF™ Protocol Packet Sniffer– Capture Bluetooth low energy

communication live with full overview.

• SmartRF™ Flash Programmer– Program CC254x devices– Read and write IEEE addresses

19

Evaluation of CC2541DK-MINI

20

CC2541DK-MINI Unboxing

Both CC2541 Keyfob and CC2540USB Dongle are pre-programmed

21

CC Debugger

CC2540USB DongleQuick Start Guide Keyfob Casing CC2541 Keyfob

Setup PC environment

1. Insert CC2540 USB Dongle

2. Install driver, located at \BLE-CC254x-1.3\Accessories\Drivers

3. Start BTool1. Choose Port (dependent on your machine)

2. Press OK

22

Power up and connect the Keyfob

23

• There are two ways of powering the CC2541 Keyfob– Using a CR2032 Coin Cell Battery– Using CC Debugger

– Device LED is green for 1 second when powered up.

• Make Keyfob discoverable– Press Right button to start advertisement – Device LED should blink red during the advertisment mode.

OR

Evaluate CC2541DK-MINI

24

Device information Message Log Device Control

• Connect to CC2541 Keyfob

Profile Proprietary

Subset of Keyfob GATT Server

25

Proximity

Accelerometer

Acc. Enable

Read/Write

01

User Desc.

X-Coordinate

Read+Notify

09

Immidiate Alert

Alert Level

Read/Write

00

Simple Keys

Key Press

Read+Notify

00

Noti.Enable01:00

Service

Characteristic

Properties

Value

Descriptor

Characteristic

Properties

Value

Descriptor

...

Link Loss

TX Power

User Desc.

Noti.Enable01:00

Interact with the Keyfob - Buttons

• Button Notifications– In Btool: Enable notifications by writing 01:00 to handle 0x0048

– On Keyfob: Press buttons to send notification

26

BEEP

Interact with the Keyfob - Alert

• Immediate Alert– In Btool: Trigger a buzzer alert by writing 01 to handle 0x0028

27

01 for Low Alert02 for High Alert00 to Turn Off

Interact with the Keyfob - Accelerometer

• Accelerometer– In Btool: Enable accelerometer by writing 01:00 to handle 0x0034– In Btool: Enable x-axis notifications by writing 01:00 to handle 0x003B

– Move the Keyfob

28

TI Bluetooth low energy Software Examples

• Profile Specific– Heart Rate– Glucose– HID Keyboard– Etc.

• Generic– SimpleBLEPeripheral– SimpleBLECentral– SimpleBLEBroadcaster– SimpleBLEObserver

29

Bluetooth SIG adopted Profiles

Cycling Speed and Cadence  (BLEv1.4)Running Speed and Cadence (BLEv1.4)Blood Glucose - Certified (pending) (BLEv1.2, February ‘12)HID over GATT - Certified (BLEv1.2, February ‘12)Proximity - Certified (BLEv1.1, July ‘11)Find me - Certified (BLEv1.1, July ‘11)Health thermometer - Certified (BLEv1.1, July ‘11)Heart rate sensor - Certified (BLEv1.1, July ‘11)Time - Certified (BLEv1.1, July ‘11)Alert Notification - Certified (BLEv1.1, July ‘11)Battery Status - Certified (BLEv1.1, July ‘11)

TI Bluetooth low energy Solutions

http://www.ti.com/ble

TI Bluetooth low energy Wiki

http://www.ti.com/ble-wiki

TI Bluetooth low energy E2E Forum

http://www.ti.com/ble-forum

TI Bluetooth low energy SensorTag

http://www.ti.com/sensortag30