Omni-ID Sense IoT Manual de usuario

KIT USER GUIDE

LOCATE - POSITION

INTRODUCTION

Congratulations, you are now the proud owner of the SenseIoT LoRa

Technology Evaluation Kit that will help supercharge your IoT projects.

The IoT devices in this kit are called Sense Locate – Position. As well as

harnessing the power of LoRaWAN these intelligent devices include GPS

and an Accelerometer to provide tracking and position accuracy over long

distances.

LoRaWAN is an IoT focussed communications technology that enables

communication with physical gateways which then communicate via a

cellular or IP network to a cloud or locally hosted network server and then to

a subsequent application server.

The Sense Locate – Position is perfect when high volumes of devices with

low communication needs are required. It is very power ecient to ensure a

long life from the built-in battery and very robust for outdoor use.

This kit contains:-

• 5 Sense Locate – Position IoT devices

• An NFC Programmer with charging cable

• A Multitech reader with power cable, plug adapters, network cable,

USB cable and Antenna.

• Memory Stick containing Omni-ID Sense Cong PC software,

electronic version of this user guide and user guides for the

Multitech reader.

• A magnet that can be used to activate the devices and put them

back to sleep.

We hope you enjoy using this kit and ‘testing your Senses’.

The Omni-ID team.

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CONTENTS FOR THIS USER GUIDE

1.1

1.2

1.3

1.4

1.5

2.1

2.1.1

2.1.2

3.1

3.1.1

3.2

3.2.1

3.2.2

3.2.3

3.2.4

4.1

4.2

4.2.1

Tag Operation

DBR (Default Beacon Rate)

ABR (Alarm Beacon Rate)

MAB (Motion Alarm Beacon)

GNSS Firmware basic algorithm

Operation Flow Chart

Sense Locate Position, LoRaWAN packets

Device Gateway beacon

LoRa Network Join Request

Sense Locate Position Data Payload

Device’s congurable settings

Conguring Sense Locate Position with Sense Cong PC App

Sleep Tag

Conguring Sense Locate Position with Android App

Settings and default values

Fast Lock

High Accuracy

Advanced

Sense Locate Position Demo Kit

OmniSphere User Guide

Miultitech Gateway Conguration

Conguring IP Address

Data Sheet

Comparrison Guide

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1 Tag Operation

Sense Locate Position is a Class A, LoRaWAN Asset tracking device, equipped

with GNSS to provide accurate asset location over LoRaWAN.

LoRaWAN is a secure communication standard that delivers Secure 128 bit

AES end to end encryption.

The device achieves long life by limiting the GNSS module activity to provide

updates only after asset have ceased movement for at least 1minute period.

If an asset has not moved the previous known position is reported avoiding

the GNSS module from having to be switched on to provide an updated

position.

This device will not provide position while moving, if this is required please

contact Omni-ID to discuss this requirement.

Sense Locate Position is designed for tracking and monitoring applications

over LoRaWAN with following built in sensors:

• Accelerometer

• Temperature

• GNSS

Once the device is in a session with a Network Server it transmits Beacons

containing sensor data on congurable beacon rates.

The device beacon rate is dependent on the congurable device settings.

The device has the following beacon states:

• Default Beacon Rate (DBR), congurable

• Alarm Beacon Rate (ABR), congurable

• Motion Alarm Beacon (MAB), The device will beacon when it senses

motion and enters Motion Alarm state, non-congurable.

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All beacons regardless of DBR, ABR or MAB contain the following payload

data:

• GNSS Coordinates in the form of Longitude and Latitude, current

updated location or previous location depending on

event triggering the beacon.

• GNSS Lock, indicating if position lock is achieved within

congurable thresholds (DOP, Min and Max lock times), if last known

location is being sent the lock ag is not set.

• Temperature

• Device Battery Voltage

• Alarm Flags.

1.1 DBR (Default Beacon Rate)

The default beacon rate is the frequency at which the tag beacons its

sensor data under normal conditions (not moving and within temperature

threshold).

The tag default beacon rate can be set as a value of 1-255 Hours.

While in DBR state, the device transmits last known GNSS coordinates, it does

not activate the GNSS module to update position for DBR beacon. The GNSS

module is only activated post device movement.

1.2 ABR (Alarm Beacon Rate)

The ABR is the rate at which the device monitors the temperature. If

the temperature detected is outside of the congurable Minimum and

Maximum temperature threshold, it will set the Temperature Alarm Flag and

transmit a single ABR Beacon.

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The device carries on sensing the temperature at the ABR and will transmit

an ABR beacon when the temperature returns to within the acceptable

threshold. This beacon resets the Temperature Alarm Flag.

The alarm beacon rate can be set as a value of 0-254 minutes

Setting the value to zero disables the ABR.

ABR payload contains last known GNSS coordinates, it does not activate

the GNSS module for ABR beacon. The GNSS module is only activated post

device movement.

Motion Alarm Beacons are transmitted under the following situations:

• Motion detected: The device transmits a single beacon when it

senses motion, it sends its last known location, sets Motion Alarm

Flag and GNSS Lock/x Flag not set. The device will only send

1 Motion detected triggered beacon while moving.

• Motion Stopped: The Device transmits a single beacon when

it senses that movement has stopped, it sends its last know

location, Motion Alarm Flag is not set and GNSS lock/x ag not set.

• The GNSS module is activated when the device is stationary post

motion for a period greater than 1minute. Once it has achieved a

GNSS x based on user congurable settings the device sends its

current position, Motion Alarm Flag is set and GNSS lock/x ag

set.

If the GNSS module fails to achieve a lock/x within GNSS Max lock time

which is user congurable the device will reattempt after a period of 10

minutes.

GNSS lock/x is attempted a total of four times, if the lock/x is not achieved

after three reattempts the device will beacon the position achieved on nal

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1.3 MOTION ALARM BEACON

1.4 GNSS Firmware basic algorithm

Following ow diagram simplies GNSS algorithm based on Tag’s motion

state sensed by Accelerometer Sensor.

Figure 1: MAB basic operation showing GNSS activation process

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1.5 Operation Flow Chart

Figure 2: Above ow chart documents the device’s operation

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2 Sense Locate Position, LoRaWAN payload

Packets sent over the air from the device to the gateway:

• LoRaWAN Network Join Request

• Device Payload (Either DBR, ABR or MAB beacons)

Packets sent from device to gateway

• Message Acknowledgments used for initiating Network Join

Request

• LoRaWAN control and synchronisation messages, such as ADR

conguration messages from gateway to device.

2.1 Device to Gateway beacon

2.1.1 LoRaWAN Network Join Request

Sense Locate Position is a Class A, LoRaWAN device which uses OTTA (Over

the Air Authentication) procedure to join a LoRaWAN network.

During the join procedure the device transmits a join request and waits for

response from a Network Server to establish a session.

Once the device is in a session with a Network Server it transmits Beacons

containing device sensor data depending on the congurable beacon

schemes.

In order to join Network end device starts the join procedure by transmitting

join request containing,

• DevEUI (Device’s unique ID, 64 bits)

• AppEUI (Application Unique ID, user congurable, 128bits)

• DevNonce (Unique randomly generated number to prevent replay

attack)

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An App key needs to be precongured in the Network Server and is used to

validate that the device has permission to communicate with the network.

These values are user congurable and devices can be supplied pre-

congured with alternative values as part of Service Bureau customisation

service.

Once Network Server accepts join request, the device then generates

following session keys based on App Key,

• NwSKey (Network Session Key): To be shared with Network server

• AppSKey (Application Session Key): To be shared with Application

Server, this ensures end to end encryption of pay load data.

Beacons are then received by LoRa gateway and forwarded to

Network Server which will push data to the end application server.

Figure 3: LoRaWAN Network Infrastructure

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