1. Device Service SDK Deep Dive
Tech Talks – Session 10

2. Agenda Generating a Device Service Generated DS Components
Service Configuration File
Generated DS Components
Features
Service Coverage
Developer Implementation
Device Profile Recap
Further References
Upcoming Tech Talks
Q&A

3. Tyler Cox Dell SW Senior Engineer & Software Architect
From Dell End User Computing (EUC) CTO
Southbound Developer for Fuse
I wrote most of the reference Device Services and the SDK
Dell Fuse => EdgeX Foundry

4. Big Picture and DS SDK

5. Generating a Device Service
Pull down device-sdk-tools
Import in Eclipse
Modify your Service Configuration file
Run the project to generate a new service
You’re ready to start developing!
Follow the numbered TO DOs for now…
Improvements to come!

6. Service Configuration File
Service Name (device-<protocol-name>)
Service Port
Service Labels (can be used for filtering with northbound services)
Configure Scheduling
True builds the scheduling code in locally
False lets you leverage the standalone scheduler service
Define your Profile Attributes
Metadata elements used by the protocol library for a type of device
UUIDs for Bluetooth LE
HoldingRegisters for Modbus

7. Generated Device Service Components
Included in generated code
Controllers for REST Interfaces
Handlers for servicing requests
Data transform for basic handling
Local Metadata cache, kept consistent with callbacks
Driver interface to protocol library

8. Device Service SDK Features
Services generated with the SDK support the following:
Synchronous read and write operations to devices
Asynchronous data flow from devices
Initialization and deconstruction of Driver Interface
Initialization and disconnection of Devices
Framework for automated Device discovery
Support for multiple types of Devices with Device Profiles
Support for sets of actions triggered by a command
Cached responses to queries

9. Device Service SDK Interfaces
DS generated with the SDK handle interactions with these services:
Metadata
Core Data
Command
Consul
Logging
Scheduling

10. Device Service Implementation
Implemented by developer
Plug protocol library into driver interface
Implement device discovery if desired
Configuring default objects
Default Schedules/ScheduleEvents
Default ProvisionWatchers
Write Device Profiles to support devices

11. Device Profiles
Covered in further detail in Tech Talk 5 – Metadata Part 2
All past Tech Talks on the Wiki
Tell your device service how to interface with a device
Commands – used for REST API definitions
Resources – handle commands
Device Resources – describe device properties and how to reach them
Existing device profiles for current device services can be found in the resources directory

12. Further References SDK Getting Started Guide
ates+the+Device+Service
Device Service Architecture Section
Device+Services+Microservices
Reference Device Services
MQTT, SNMP, Modbus, Bluetooth LE, BACNet, Fischertechnik, and Virtual
Discussions on Rocket Chat #device-services
Or chat with me

13. Upcoming Tech Talks Suspending Tech Talks next week
Focusing on Barcelona release
Restart Tech Talks after Barcelona (mid – October)
Suggestions welcome on other topics/direction of tech talks
Jim or I suggestions

14. Questions and Answer Time