Develop with Mbed OS - The Things Conference 2019

Develop with Mbed OS
Jan Jongboom, Arm

Jan Jongboom
Principal Developer Evangelist
jan.jongboom@arm.com

Just a sensor, radio and a battery
Static session keys (just ABP)
That's it...
Back in 2015...

LoRaWAN is evolving...
New security principles
(join servers, root keys)
Firmware Updates
now standardized
Device Management
ongoing work
Complexity
https://www.geograph.org.uk/photo/5266523

Parts required in an IoT device
Bootloader
Asymmetric crypto
Storage driver
Resilient filesystem
Advanced  
LoRaWAN stack
Radio drivers
FlashIAP
Update clientPower management

Arm Mbed
A free, open source Platform OS targeting IoT end node devices
Mbed
OS
Cortex-M
RTOS 
kernel
Portable 
drivers
Integrated 
security
IoT 
connectivity
Device
management
Development
tools
Developer
community
Partner
ecosystem
150 development boards
LoRaWAN, BLE, Cellular, Wi-Fi, etc.

Open source and community built
325,000 developers
70+ partners
3,000 commits in 2018
Apache 2.0 licensed
https://os.mbed.com

Built with Mbed
LightGrid Smart Speakers Tilt monitor Beacons Parking sensor Gateway EV Charger Ocean Connect
Asset tracker Gateway Smart City Luminaire Patient tracker
Industrial
sensor Smart city bins Parking barrier
Electric meter
Pedometer Street light Smart shelf Agriculture
Water sensor Submarine
Factory
humidity
Air vent Food allergy
Indoor
positioning Door lock
City mapping
Office lighting

LoRaWAN in the Mbed community
Which connectivity do you plan to use in the coming year?
Source: https://os.mbed.com/blog/entry/Results-of-the-Mbed-Developer-Survey-201/

Mbed OS LoRaWAN stack
LoRaWAN versions
1.0.2, 1.0.3*, 1.1*
Class support
A & C
Radios supported
SX1272, SX1276
Features
Firmware updates
Channel plans
Highly configurable
Better reception at low data rates
* in branch

The numbers
RAM ROM
Typical microcontroller: 32K RAM / 256K Flash
Stack is fully tuneable
Minimum configuration (includes everything):
6K of RAM, 65K of ROM
Optional: offload crypto to external module
* Measured on NUCLEO-F411RE with SX1276
19% 25%

Cryptography
TLS
In software With external crypto engine

Testing
~1,150 functional tests
Test farm of >800 devices
40,000 hours of testing on real hardware per release
Pre-certified for LoRaWAN 1.0.2
http://www.redwoodcomm.com/product/01.php

The secret behind LoRaWAN's battery life...
😴

Automatic sleep management
DISCO-L475VG with SX1276 LoRa radio, MBED_TICKLESS enabled

https://os.mbed.com/platforms

LoRa radio
SX1272 / SX1276 shieldTarget with built-in radio

Examples
Basic example:  
https://github.com/ARMmbed/
mbed-os-example-lorawan
With ATECC608A:  
mbed-os-example-lorawan-atecc608a
With FUOTA:  
mbed-os-example-lorawan-fuota

Slides: hlp://janjongboom.com
Thank you!
Jan Jongboom
Principal Developer Evangelist
jan.jongboom@arm.com

Develop with Mbed OS - The Things Conference 2019

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