IIOT solution introductionLinear Technology - Taiwan

Field Application Manager

Jacky Chen/陳柔文

Agenda

Linear Technology and Dust networks

Background of WirelesHART and Internet Protocol

What and Why “Time Synchronous Channel Hopping”?

Product Portfolio

Design Example

Successful Sharing

Dust Networks

Dust Networks founded in 2002, became part of Linear Technology since 2011/December

Pioneer and inventor of low power time synchronized, channel hopping WSN.

Core technology for WirelessHART and IEEE 802.15.4e standards.

The market leader of WirelessHART.

LTC5800 is the world’s lowest power 802.15.4 system-on-chip.

-Sub 50μA routing nodes .

SmartMesh™ WirelessHART: for industrial process applications of WSN.

-Compliant to WIrelessHART/IEC62591 and 802.15.4.

-WirelessHART is adopted in GB/T29910.1~6-2013 “Industrial Communication Networks – Fieldbus Specification – Type 20: HART specification”.

SmartMesh® IP: for applications of wireless sensor networks where seamless internet protocol (IP) integration is valued.

-Compliant to 6LoWPAN and 802.15.4e standards.

Dust Networks and Linear Technology

Combine both leading technology

What is HART? (Highway Addressable Remote Transducer)

Frequency Shift Keying modulation.1200Hz, 2200Hz stands for 0 and 1.

Based on 4 – 20ma signal line. Combine analog and Digital as one.

Digital signal update 2 ~ 3 packet/sec. More data can be delivered, benefit factory

operation, maintenance.

Benefit of HART Saving installation/cable cost. Bi-directional and Digital communication.

WirelessHART

Why 2.4GHz? World wide only useable ISM band. How many channels? 16 chs, spread spectrum. How to avoid interference? mesh and time division.

Installation EffortPower Consumption

Intelligence

Trend

SmartMesh IP(Internet Protocol) product line

IP protocol stack for low power, wireless sensor network

6TiSCH is under developingBy LTC and Cisco!

Radio Interference(multipath and noise)

*Tx node is 5M away from Rx node.*1000 packet was delivered on each position.*Rx node move in an area of 35cm x 20cm.

Radio Interference(Wi-Fi noise, 2.4GHz)

*Tested single wireless path between 2 nodes.*16 channels in 26 days, typical office environment.*Ch17 generally good, but, has one day of 0 PDR.

~~

Solutions(Time synchronous, Channel Hopping)

IP (Time step)WirelessHART

FreqChannel step

CH1

CH2

CH3

CH4

CH5

CH6

7.5ms 7.5ms 7.5ms 7.5ms 7.5ms 7.5ms 7.5ms 7.5ms10ms 10ms 10ms 10ms 10ms 10ms 10ms 10ms

SmartMesh Performance

Time synchronized, channel hopping and true mesh for >99.999% reliability

Every mote (by default a router) can run on batteries for 5-10 years

Only active in timeslots where they are scheduled to transmit or receive, typ. DC <1%

90 byte packet, max 24-36 packets/second through the manager (~2.6kbps)

Built in security and network management All packets are authenticated on each layer, and encrypted end-to-end

Ongoing discovery process ensures the network continually discover new paths as the RF conditions change

Motes track performance statistics and periodically send to the manager for continually optimizing the network

Blink mode

What is “blink mode”? Smartmesh IP mote is allowed to send packet through network without joining network.

Some key features Lower average current than standard mesh mote. ~ 2uA average current, when sending one packet per day.

Publish packet must not infrequently. Once per day or per event.

Very large number of Blink motes can be deployed in a single network. Up to 500,000.

Security built in.

Unidirectional upstream.

Blink mode design example Today, industrial plants manually check for toxic gas leaks ~ 1x / year

• 100k’s points to monitor by walking around• Government fines can be costly

Deployment:• Cover area with ~100 Infrastructure nodes (Mesh-mode)• ~500,000 Gas Detection nodes as Blink nodes• Each Sends 1x / Day (randomly distributed throughout the day)

“Best of Both Worlds” - Using Both Blink Mode & Mesh Mode• Normally in Blink mode• 1/month – join network to check for OTAP, configuration settings• Ease of Ownership / Long-term maintenance

VManager

VManager – a software-based manager and separate Access Point Motes that enable:• Large Networks – thousands of nodes.

• Increased Bandwidth through Multiple Access Points.

• Hot Failover Gateway Redundancy.

• Greater Flexibility in Network Deployments.

Large Network with Multiple Embedded Managers

Each Independent Sub-Network. Add mote = match network ID & Join Key. Customer Software maintains individual connections to

each manager. Sub-Networks coexist, but traffic contributes to noise

floor of other sub-networks.

Large Network with Virtual Manager

One Network with:• Single network ID• Gateway Redundancy• Single API connection with Customer Software• All nodes coordinated – no in-network collisions

Embedded manager vs VManager

Mesh solutions comparison

Eterna - Dust Networks SoC

Software overview

Built-in Sensors• 4 channels 10-bit ADC • On-chip temperature sensor• Battery voltage monitoring

Interfaces to external devices• SPI• I2C• 1-Wire• UART (HDLC enabled)• 16 GPIOs

Miscellaneous Services• File system• Charge accounting• Accurate time-stamping• Random number generator• AES-128 encryption cipher

(built-in CBC, CTR, CCM* modes)

Memory set aside for the application• 8kB RAM• 32kB flash• 60kB file system space

-These are the sizes set aside for your application only.

-These sizes are not hard coded and can be changed.

-However they are strongly recommended to guarantee compatibility.

On-chip SDK available for SmartMesh IP

On-chip SDK

Built-in iC/OS-II real-time embedded operation system.• The application consists of uC/OS-II tasks.• Fully licensed, no need to buy a uC/OS-II license.

The SDK allows users to run their application directly on the Eterna chip• Used with the standard DC900xx Eval/Dev kit available today.

External micro-controller is optional, not necessary.

Pre-built framework for quick development• The application interacts with the stack/devices over a clear API.• Fully documented API.

Interfaces to the pre-compiled SmartMesh IP Network stack• All the networking is handled “under-the-hood”.• The application sends and receives data through a UDP socket interface.

Access to numerous interfaces• On-chip sensors.• Interfaces to off-chip sensors.

Simplified IntegrationNo network stack coding required:

- Easy software integration- Fast time to market

Mote interface:Software serial API over UART.

Embedded Manager interface:Software serial API over UART.

Start Kit for evaluation

PC connections for development to SW APIs

SmartMesh Performance Estimator

DustCloud The online resource for customers We support customers directly through the cloud http://dustcloud.org/

Product Portfolio – IP/Mote

Product Portfolio – IP/Manager

Product Portfolio – WirelessHart/Mote

Product Portfolio – WirelessHart/Manager

Energy harvest converter – LTC3330

LTC3330 Efficiency performance

Temperature sensor design example

2in x 2in under 200-luxCan generate 40uA.

Temperature sensor design example

Temperature sensor design example

DC2126A temperature sensor demo board

Entire circuit typically ~50µA• Can run entirely on small solar panel in typical meeting room light• Or can run 5+ years on included Tadiran battery if no light

Wireless Radio ~20μA • Depends on how many hops, advertising, etc• Can use SmartMesh Performance Estimator* to get more details

Temperature Measurement ~20µA • Default takes one reading per 10 seconds• ADC shuts itself off when not reading• Use LTC3330 LDO to duty-cycle reference and thermistor bridge• On-chip micro in LTP5901-IPM is programmed to do this duty-cycling

Energy Harvester ~80% efficiency• Depending on whether LTC3330 runs from battery or from solar panel

Emerson Process – Smart Wireless Instrument

A new wireless application can be put anywhere in this 700 acre (~2.8km2) Chevron plant

MicroDataDue – smoke and Flame detection on ship

MicroData DueWireless smoke and flame detection for passenger and military ships

Questions?Thanks your time!