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Mexico City Sigfox Makers Tour #21
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Introduction
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The first IoT network in Mexico
Anai Aguilar Daniel Guevara
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4
Alexandre Araujo Nicolas Lesconnec
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About Sigfox
IoT Communication Service
Available in 32 countries right now
Low Energy + Simplicity
Chipsets from several major silicon vendors
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Online resources
Technical information : http://makers.sigfox.com
Videos : http://youtube.com/sigfox
Q&A : http://ask.sigfox.com
Github: http://github.com/sigfox
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Sigfox basics
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About Sigfox
Sigfox is not selling chips
Sigfox is not building connected solutions
Sigfox has invented a radio protocol
Sigfox operates a global network
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Why Sigfox ?
Need for a solution dedicated to the IoT, not an existing one tweaked for it.
We only serve the IoT, that’s why we’re doing it efficiently
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New possibilities
Existing solutions: Cheaper connection & extended battery life
Enables totally new IoT applications
Backup connectivity for higher bandwidth devices
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How to sigfox
Detect something to send (that’s the hard part)
Power on the communication module
Send
Message is picked up by the network
Data is received on your server
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Core concepts
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Simplicity
No connection
No configuration
No pairing
No signaling
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Low Energy
Years of battery life
Independent solutions
Reduce maintenance & TCO
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Low Energy
Tx: ~200mA during a couple of seconds (@22dBm)
Key factor: idle consumption (99.x% of the time)
Idle consumption: µA range
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Very Long Range
Best case scenario
+100km between transmitter & receiver (base station)
Real life
A few kms (city) to tens of kms (countryside), depending on the topography
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Outdoor & Indoor
Good indoor propagation properties
Of course, you need to consider signal attenuation (~20dB)
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Two-way communication
Devices can receive updates sent from your application server
Each communication is instigated by the device
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Small messages
Useful payload: up to 12 bytes
Up to 140 times each day (contract)
600 bits/s
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Less is more !
GPS coordinates (lat x lng) : 6 bytes
Temperature: 2 bytes
State reporting : 1 byte
Heartbeat, update request : 0 byte
Keep it as simple as possible
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Example: Sensit
816b1954 | 10000001 01101011 00011001 01010100
10000001 01101011 00011001 01010100 Active mode (Temp)
10000001 01101011 00011001 01010100 Temp. MSB & LSB
10000001 01101011 00011001 01010100 Humidity x2
Temp : 0110011001 = 409 . (409-200) / 8 = 26.125°C
Humidity: 01010100 = 84. 84/2 = 42%
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Security
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Security
No keys exchanged over the network, no handshake
Messages can be encrypted or scrambled
Each message is signed with a key unique to the device
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Message signature
With each message, a hash is calculated & sent; using:
Device ID
Secret key, unique to the device. Never transmitted OTA
Payload
Internal increment
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Radio properties
Great tolerance to interferors
Jamming resistant
Interception is hard: UNB & frequency diversity
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Jammers
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Radio Ultra Narrow Band
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Sigfox use
The network currently monitors a 192KHz part of the spectrum
Each message is ~600Hz wide
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Interferors
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Sigfox messages
192 KHz
Each repetition is 100Hz
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Regulations
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Regulations
Sigfox is operating on unlicensed Sub-GHz frequency bands all over the world
We just have to pick the right central frequency
Easy, right ?
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ETSI Duty cycle
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Unlicensed bands
Compliant with regulations
ETSI 300-220
FCC Part 15
ANATEL 506
AS/NZS 4268
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Different Radio Configuration Zones
Regional regulations affect
Central frequency
Power Output / Data Rate
Spectrum access
Handled by the Sigfox stack
Same hardware can be used, with software switches
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Sigfox Radio Configuration Zones
RCZ1 RCZ2 RCZ3 RCZ4
Frequency868 MHz 902 MHz 923 MHz 920 MHz
Power output14 dBm 22 dBm 14 dBm 22 dBm
WhereEurope/MEA N.America &
Brasil East Asia Asia &
Pacific & S.America
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Coverage
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Global network
Sigfox is offering a global network, not a solution to build private networks
Roaming is included is the standard service
Devices will work the same all over the network
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Sigfox Radio Configuration Zones
RCZ1 RCZ2 RCZ3 RCZ4
Frequency868 MHz 902 MHz 923 MHz 920 MHz
Countries
! " # $ %
& ' ( ) *
+ , - . /
0 1
2 3 4 5
6 7 8 9
:;< = >?@ AB CD
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Break
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Current use cases
Examples of solutions already in production
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Internet of Things ?
Consumer gadgets
Boring & usefulIoT
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Perfect Sigfox use cases
Independent solutions
no user, no power socket, no local network
Shy devices
Doesn’t speak much, but only useful data
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Asset tracking & Security
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Asset tracking
Shipment / Pallet tracking
Valuable assets
Post-theft recovery
GPS or pure network geolocalisation
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Home Alarm System
Backup connectivity for GSM solution
Jamming resistant
Continuity of service
Self deployment
High capacity network
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Smoke detector
Easy install
Fault detection
Remote alert
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Industry
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Predictive maintenance
Optimize & anticipate maintenance
Alerts when customer needs support
Lower operation costs
Increased safety and/or customer satisfaction
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Maintenance
Connected boilers
Remote sites intrusion detection
Industrial equipments
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Health & Assisted living
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Assisted Living Box
Elderly people benefiting from home services
Monitor carers come & go
NFC badge reader
ROI : 6 months
Increased service quality
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Fall Detector
Send an alert when the bearer falls
Panic button
No set up
Long battery life
No « locked in » effect ; works everywhere
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Public sector
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Metering
Different solutions
Smart or add-on to existing meters
Low cost of installation & operation
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Smart parking
Parking spots monitoring
Real time guidance for users
Traffic optimization
Local enforcement optimization
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Waste management
Optimize costs of collection
Plug & play
Years of battery life
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Street lighting
Save Energy & Costs
Improved maintenance
Light intensity management
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Agriculture
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« Smart Agriculture » ?
Crop sensors to optimise yield
Livestock « predictive maintenance »
Beehives monitoring
Weather monitoring
Cattle tracking
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Retail & other services
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Button
Simplest interface possible
Press a button ; trigger a service
No installation
Cloud-based services
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Customer Satisfaction
Effortless customer feedback
No wiring
No pairing
Long battery life
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Sigfox foundation
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Antarctica
Tracking scientists & assets
Long reach
Ease of use
Robust trackers
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Wildlife
Rhinos tracking & monitoring
Anti poaching operation
Implant & play
Long reach
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Hardware solutions
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Hardware
Sigfox is not a hardware vendor
Ecosystem of established partners
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Modules
Starting from $2
Offers combining Sigfox with Wifi , BLE, GPS
Fast track for product certification
Quite expensive
for industrialisation
Skills needed
Ref.Designs
Cheapest solution
Skills++ needed
Certification
program
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Building your own
You can build your own, using one of the compatible RF transceivers (NXP, STMicro, TI, Semtech, SiLabs)
Only interesting for huge volumes, retrofit or special requirements
Will need full Sigfox certification program
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Antenna
Best way to ruin a great device is to mess the antenna integration
Balance between design & performance
Take into account from the early days of your project
We’re here to help with experts !
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Prototyping
Arduino & Raspberry Pi kits available from various partners
RCZ2 (Americas) solutions ecosystem starting to grow
Check out http://partners.sigfox.com for the full details
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Cloud
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Get your data
View messages : Sigfox web platform
Get messages : REST API (pull)
Receive new messages : HTTP Callbacks (push)
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Callbacks
Each message received from your devices will be forwarded to your application server
Customisable headers & body
You can set more than one callback
Used to send data back to the device as well
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3rd party platforms
You can easily push your data to a 3rd party platform :
AWS, Azure, Telefonica, thethings.iO, IBM, Samsung…
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Downlink messages
A downlink message can be
Semi automatic : sent directly by the network
Customised : sent by your own application server
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Workshop session
Using Thinxtra Xkit boards
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Sigfox Workshop
Using Thinxtra Xkit
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Contribute back
Don’t forget to publish your experiments
Code Samples, HW design, fails … will be useful to other people
We all start by copy/pasting ;)
Your own website, github, hackster.io, instructables … your call!
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Useful Resources
Session resources http://bit.ly/SMTSaoPaulo
XKit http://thinxtra.com/xkit
Questions ? http://ask.sigfox.com
Github
http://github.com/sigfox
http://github.com/nicolsc
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Register
http://backend.sigfox.com/activate
Provider: Thinxtra
Country : Choose yours. (Default: France)
ID/PAC : Check sticker
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Hello World
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Arduino Setup
Open the Arduino IDE
Select the board (COM port)
Board type : Arduino Uno
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Hello world sketch
void setup() {
Serial.begin(9600);
Serial.print("AT$RC\n");
delay(100);
Serial.print("AT$SF=0123CAFE\n");
}
void loop() {}
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Upload to the board
Remove the shield first
Then click Upload / Descargar
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Message received ?
http://backend.sigfox.com
Navigate to the devices menu in the top bar
Click on the ID of your device
Enter the messages menu from the left navigation column
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First callback
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Callback setup
Device Type menu
Click on your device type name
Enter the Callbacks menu
Select new default callback
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Callback setup
TYPE : DATA UPLINKChoose a CHANNEL : URL (EMAIL for a quick test)Url pattern: URL of your own serverUse HTTP method: GET/POST/PUT
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Callback status
In the Devices > Messages panel, you have a indicator of the callback status (an arrow)
Black : in progress
Green : Callback OK
Red : Callback KO (at least one of the callbacks failed)
Click the arrow to display details.
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Downlink
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How does it work ?
Send a message, with a downlink flag
Once message is sent, the module gets back to sleep
After 20s, it will wake up automatically, in Rx mode
It will wait 20s for a downlink message
Afterwards it will get back to sleep
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Downlink setup
To setup an automatic callback :
Device Type > Info > Edit
In the Downlink data settings, set the following :
Downlink Mode : DIRECT
Set the following value : 123400000BADCAFE
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How to request a downlink
Same AT command, with additional parameters
AT$SF=[hex byte]*, 1
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Handle the response
When entering Rx mode, the module will display
+RX BEGIN
Received frame (if any) will be displayed as: +RX= [byte] [byte] [byte] [byte] [byte] [byte] [byte] [byte]
End of Rx mode
+RX END
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Downlink callback
In Device Type > Info > Edit
change Downlink mode to CALLBACK
Create a new default callback, with TYPE : DATA | BIDIR
Then set up your URL
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Sample input output
AT$SF=55 50 4C 49 4E 4B,1
OK
+RX BEGIN
+RX=44 4F 57 4E 4C 49 4E 4B
+RX END
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XKit - demo app
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Copy the source code from github
https://github.com/aureleq/Xkit-Sample
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Geolocation
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Geoloc callback
Simply create a SERVICE > GEOLOC callback, and receive latitude + longitude + accuracy
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