Matthias Kovatsch of ETH Zurich presented during the Open Mobile Alliance LwM2M Workshop event on January 28, 2015. This is a copy of the slides presented for his session titled, "OMA LwM2M DevKit Client Simulator and CoAP Implementations".

1. The OMA LWM2M DevKit Client Simulator and CoAP Implementations 1|
Matthias Kovatsch
http://people.inf.ethz.ch/mkovatsc
Matthias Kovatsch
kovatsch@inf.ethz.ch
The OMA LWM2M DevKit Client Simulator
and CoAP Implementations
Wednesday, 29 Jan 2015
OMA LWM2M Workshop
Düsseldorf, Germany

2. The OMA LWM2M DevKit Client Simulator and CoAP Implementations 2|
Matthias Kovatsch
http://people.inf.ethz.ch/mkovatsc
The OMA LWM2M DevKit
LWM2M Protocol Handling in the Web Browser

3. The OMA LWM2M DevKit Client Simulator and CoAP Implementations 3|
Matthias Kovatsch
http://people.inf.ethz.ch/mkovatsc
Interactive LWM2M Client in the Web Browser
OMA LWM2M DevKit Live LWM2M Server

4. The OMA LWM2M DevKit Client Simulator and CoAP Implementations 4|
Matthias Kovatsch
http://people.inf.ethz.ch/mkovatsc
 LWM2M Client support
 8 OMA-label Objects with descriptions
 Registration Interface
 Device Management and Service Enablement Interface
 Information Reporting Interface
 Visualization of LWM2M operations and CoAP messages
 Interactive guide
Status of Version 0.5.x

5. The OMA LWM2M DevKit Client Simulator and CoAP Implementations 5|
Matthias Kovatsch
http://people.inf.ethz.ch/mkovatsc
Getting Started
Launcher button Browser addressbar
URI scheme: coap+lwm2m

6. The OMA LWM2M DevKit Client Simulator and CoAP Implementations 6|
Matthias Kovatsch
http://people.inf.ethz.ch/mkovatsc
Organization of the GUI
1

7. The OMA LWM2M DevKit Client Simulator and CoAP Implementations 7|
Matthias Kovatsch
http://people.inf.ethz.ch/mkovatsc
Organization of the GUI
2

8. The OMA LWM2M DevKit Client Simulator and CoAP Implementations 8|
Matthias Kovatsch
http://people.inf.ethz.ch/mkovatsc
Organization of the GUI
3

9. The OMA LWM2M DevKit Client Simulator and CoAP Implementations 9|
Matthias Kovatsch
http://people.inf.ethz.ch/mkovatsc
4

10. The OMA LWM2M DevKit Client Simulator and CoAP Implementations 10|
Matthias Kovatsch
http://people.inf.ethz.ch/mkovatsc
5

11. The OMA LWM2M DevKit Client Simulator and CoAP Implementations 11|
Matthias Kovatsch
http://people.inf.ethz.ch/mkovatsc
5

12. The OMA LWM2M DevKit Client Simulator and CoAP Implementations 12|
Matthias Kovatsch
http://people.inf.ethz.ch/mkovatsc
6

13. The OMA LWM2M DevKit Client Simulator and CoAP Implementations 13|
Matthias Kovatsch
http://people.inf.ethz.ch/mkovatsc
7

14. The OMA LWM2M DevKit Client Simulator and CoAP Implementations 14|
Matthias Kovatsch
http://people.inf.ethz.ch/mkovatsc
8

15. The OMA LWM2M DevKit Client Simulator and CoAP Implementations 15|
Matthias Kovatsch
http://people.inf.ethz.ch/mkovatsc
9

16. The OMA LWM2M DevKit Client Simulator and CoAP Implementations 16|
Matthias Kovatsch
http://people.inf.ethz.ch/mkovatsc
10

17. The OMA LWM2M DevKit Client Simulator and CoAP Implementations 17|
Matthias Kovatsch
http://people.inf.ethz.ch/mkovatsc
Interactive Guide

18. The OMA LWM2M DevKit Client Simulator and CoAP Implementations 18|
Matthias Kovatsch
http://people.inf.ethz.ch/mkovatsc
https://addons.mozilla.org/firefox/addon/oma-lwm2m-devkit/

19. The OMA LWM2M DevKit Client Simulator and CoAP Implementations 19|
Matthias Kovatsch
http://people.inf.ethz.ch/mkovatsc
https://github.com/OpenMobileAlliance/OMA-LWM2M-DevKit

20. The OMA LWM2M DevKit Client Simulator and CoAP Implementations 20|
Matthias Kovatsch
http://people.inf.ethz.ch/mkovatsc
Installing the Source Code

21. The OMA LWM2M DevKit Client Simulator and CoAP Implementations 21|
Matthias Kovatsch
http://people.inf.ethz.ch/mkovatsc
 chrome/
 content/
 copper/
 lwm2m/
 main.xul
 main.js
 skin/
 clients/
 components/
 defaults/
 objects/
 chrome.manifest
 install.rdf
“chrome you put on the bare metal”
GUI and scripts (“active parts”)
CoAP implementation scripts
LWM2M implementation scripts
GUI layout (also loads scripts)
start script (onload)
CSS and images
loadable LWM2M Clients (JSON)
protocol handler (registered for coap+lwm2m)
initial registry values (about:config)
LWM2M Object definitions (JSON)
manifest
metadata (name, version, icon, …)
Extending the Source Code

22. The OMA LWM2M DevKit Client Simulator and CoAP Implementations 22|
Matthias Kovatsch
http://people.inf.ethz.ch/mkovatsc
 chrome/content/lwm2m/
 CoapHandlers.js
 ClientHandler.js
 EncodingJSON.js
 EncodingTLV.js
 Helpers.js
 InterfaceDeviceManagement.js
 InterfaceInformationReporting.js
 InterfaceRegistration.js
 Launcher.js
 Logger.js
 Tooltips.js
message callbacks
LWM2M Client functions
LWM2M JSON
LWM2M TLV
helper functions
Device Management
Information Reporting
Registration
launcher button functions
logging and debugging
interactive guide
Extending the Source Code

23. The OMA LWM2M DevKit Client Simulator and CoAP Implementations 23|
Matthias Kovatsch
http://people.inf.ethz.ch/mkovatsc
 E-mail
kovatsch@inf.ethz.ch
 Github issues
https://github.com/OpenMobileAlliance/OMA-LWM2M-DevKit/issues
Feedback, please

24. The OMA LWM2M DevKit Client Simulator and CoAP Implementations 24|
Matthias Kovatsch
http://people.inf.ethz.ch/mkovatsc
 Custom LWM2M Clients and Objects
 Integration with the LWM2M Editor
 Common JSON format?
 Leshan Ddf2json converter, ARM server configuration, …
 LWM2M Server support
 For DevKit Client when offline or no sandbox available
 For other LWM2M Clients through Server Initiated Bootstrap
Outlook for Version 1.0

25. The OMA LWM2M DevKit Client Simulator and CoAP Implementations 25|
Matthias Kovatsch
http://people.inf.ethz.ch/mkovatsc
CoAP Implementations
http://coap.technology/

26. The OMA LWM2M DevKit Client Simulator and CoAP Implementations 26|
Matthias Kovatsch
http://people.inf.ethz.ch/mkovatsc
Copper (Cu) CoAP user-agent

27. The OMA LWM2M DevKit Client Simulator and CoAP Implementations 27|
Matthias Kovatsch
http://people.inf.ethz.ch/mkovatsc
 CoAP protocol handler
for Mozilla Firefox
 Browsing and bookmarking
of CoAP URIs
 Interaction with resource like
RESTClient or Poster
 3-Clause BSD
Copper (Cu) CoAP user-agent
https://addons.mozilla.org/firefox/addon/copper-270430/

28. The OMA LWM2M DevKit Client Simulator and CoAP Implementations 28|
Matthias Kovatsch
http://people.inf.ethz.ch/mkovatsc
 Embedded CoAP Web server
for Contiki OS
 Memory footprint
ROM < 10 KiB (… 3 – 4 KiB)
RAM < 1.5 KiB
 POSIX ports exist
(e.g., Wakaama)
 3-Clause BSD
Erbium (Er) REST Engine
https://github.com/contiki-os/contiki

29. The OMA LWM2M DevKit Client Simulator and CoAP Implementations 29|
Matthias Kovatsch
http://people.inf.ethz.ch/mkovatsc
 CoAP library (no framework)
 POSIX compatible
 Port for TinyOS (CoapBlip)
 Larger memory footprint
than Erbium
 2-Clause BSD + GPLv2
libcoap
http://libcoap.sourceforge.net/

30. The OMA LWM2M DevKit Client Simulator and CoAP Implementations 30|
Matthias Kovatsch
http://people.inf.ethz.ch/mkovatsc
 CoAP for Node.js
 Modeled after the html module
 MIT license
node-coap
https://github.com/mcollina/node-coap

31. The OMA LWM2M DevKit Client Simulator and CoAP Implementations 31|
Matthias Kovatsch
http://people.inf.ethz.ch/mkovatsc
 Java CoAP framework
at the Eclipse Foundation
 For the service backend
 Very high throughput
 DTLS 1.2 implementation
 Basis for Leshan
 EPL + EDL
Californium (Cf) CoAP framework
http://www.eclipse.org/californium/

32. Questions?
Matthias Kovatsch https://github.com/mkovatsc/
kovatsch@inf.ethz.ch http://people.inf.ethz.ch/mkovatsc/