1. Bluetooth Low Energy
Bluetooth Smart
Nenad Četić – Makers NS

2. Going wireless

3. How to chose?
Range
Speed (data rate)
Cost
Power consumption

4. Standards & Feature Comparison

5. More comparison…

6. What is Bluetooth? Standard (specification)
Spread spectrum frequency hopping
ISM band GHz – GHz
3 classes of devices
Class 1 industrial 100m (100 mW)
Class 2 10m (2.5 mW)
Class 3 1m (1 mW)

7. In the beginning Ericsson 1994 Replacement for RS-232 Original name:
Short link radio technology
1999 got the name Bluetooth
Bluetooth Special Interest Group
More than 20k members

8. Etimology
Danish king Harald Blåtann (Bluetooth)

9. Evolution v1.1 v1.2 v2.0 v3.0 2001 RSSI 732.2 Kbps 2003
AFH (Adaptive F Hopping spread spectrum)
1 Mbps
v2.0
2004
EDR (Enhanced Data Rate)
2.1 Mbps
v3.0
2009
High Speed
24 Mbps
AKA Bt Classic

10. Evolution v4.0 V4.1 V4.2 V5 2009 Dec BLE ~2Mbps @ LP Range not forced
Outdoor 50m
Indoor 10m
V4.1
2013
No HW update
Resolves 4G LTE problems
Fast Advertising
Faster at LE
V4.2
2014
HW update LE data packet length extension Privacy/Security IPv6 for Bt Smart V5
Early 2017 (now!)
New HW Real IoT
LoS 200m
Indoor 40m
Mesh

11. Classic v.s. BLE (smart) 3.0 Classic 4.0 Low Energy
Connection session (connected all the time
Connection time higher
Voice capable
Pairing
On/Off
Fast connection (3ms)
No voice (some unidirectional for hearing aids)
Beacons
32 bytes

12. BLE beacons Battery Powered 32 Bytes packer broadcasted Up to 2 years
No formatting in standard
4.2 bigger packet
bytes packet
iBeacon (Apple) (propriatory)
Eddystone (Google) (open source)
Facebook Bluetooth Beacon (pushing advertisement)

13. Bluetooth 5 Just arround the corner More range x4 More speed x2
Less power 2.4 less
Real IoT devices for Smart Home
connected via gateways (protocol converters)

14. RSSI IEEE 802.11 Received Signal Strength Indication
Relative Signal Strength Indication
Radio Signal Strength Indication
0 is great – strong signal
-100 is worst – week signal

15. GATT Generic Attribute Profile Peripheral (Server) Central (Client)
Read
Write
Notify
Indicate (Ack)
Device
Service 1
Characteristic 1
Characteristic 2 …
Service 2

16. GATT Services Alert Notification Service Automation IO Battery Service
Blood Pressure
Body Composition
Bond Management
Continuous Glucose Monitoring
Current Time Service
Cycling Power
Cycling Speed and Cadence
Device Information
Environmental Sensing
Generic Access
Generic Attribute
Glucose
Health Thermometer
Heart Rate
HTTP Proxy
Human Interface Device
Immediate Alert
Indoor Positioning
Internet Protocol Support

17. GATT Services Location and Navigation Next DST Change Service
Object Transfer
Phone Alert Status Service
Pulse Oximeter
Reference Time Update Service
Running Speed and Cadence
Transport Discovery
Tx Power
User Data
Weight Scale