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Revision as of 10:16, 15 September 2017
Contents
IPSO Application Framework IPSO Offical WebSite
The IPSO Application Framework makes use of IETF standards as building blocks for a simple and efficient RESTful design model for IP smart objects. The framework may be used over either HTTP or CoAP web transfer protocols.
HTTP, REST, XML, JSON, COAP and other key components of web technology are powerful mechanisms in an Internet of Things application.
Note: The objective of the Alliance is not to define technologies, but to document the use of IP-based technologies defined at the standard organizations such as IETF with focus on support by the Alliance of various use cases.
Function Sets: The framework is organized into groups of resource types called Function Sets. A Function Set has a recommended root path, under which its sub-resources are organized. Each Function Set is assigned a Resource Type parameter, therefore making it possible to discover it.
| Function Set | Root Path | Resource Type |
| General Purpose IO | /gpio | gpio |
| Power | /pwr | pwr |
| Load Control | /load | load |
| Sensors | /sen | sen |
| Light Control | /lt | lt |
| Message | /msg | msg |
| Location | /loc | loc |
| Configuration | /cfg | cfg |
IPSO Smart Object
IPSO Smart Object[2] Guidelines provide a common design pattern, an object model, that can effectively use the IETF CoAP protocol to provide high level interoperability between Smart Object devices and connected software applications on other devices and services
The common object model is based on the Lightweight M2M (LWM2M 1.0) specification from the Open Mobile Alliance. OMA LWM2M is a device management and service architecture specification based on IETF CoAP, and provides a simple and flexible object template (object model) for constrained device management.
The object model from OMA LWM2M is reused to define application level IPSO Smart Objects. This enables the OMA Name Authority (OMNA) to be used to register new objects, and enables existing LWM2M compliant device libraries and server software to be used as an infrastructure for IPSO Smart Objects
This first IPSO Smart Object Guideline describes 18 Smart Object types [Appendix A], including a temperature sensor, a light controller, an accelerometer, a presence sensor, and other common sensor and actuator types representing a variety of use case domains. It is intended as a ?tarter pack??and example of how IPSO Smart Objects can be built to address some application specific use cases
Media Types for Sensor Markup Language (SENML)
Semantics
| SenML | JSON | Type | Description |
| Base Name | bn | String | This is a string that is prepended to the names found in the entries |
| Base Time | bt | Integer | A base time that is added to the time found in an entry |
| Base Units | bu | String | A base unit that is assumed for all entries, unless otherwise indicated |
| Version | ver | Number | Version number of media type format |
| Measurement or Parameters | e | Array | Array of values for sensor measurements or other generic parameters |
| Name | n | String | Name of the sensor or parameter |
| Units | u | String | Units for a measurement value |
| Value | v | Float | Value of the entry |
| String Value | sv | String | |
| Boolean Value | bv | Boolean | |
| Value Sum | s | Float | Integrated sum of the values over time |
| Time | t | Integer | Time when value was recorded |
| Update Time | ut | Integer | Update time. A time in seconds that represents the maximum time before this sensor will provide an updated reading for a measurement. |
The Data Type of Sensor Data Type
| Data Type (type) | SenML Field |
| b (boolean) | bv |
| s (string) | s |
| e (enum) | e |
| i (integer) | v |
| d (decimal) | v |
| h(hexadecimal) | s |
| o(octet-stream) | s |
Advantech Sensor Semantics
| SenML | JSON | Type | Description |
| Min Range Value | min | Float | The minimum value that can be measured by the sensor |
| Max Range Value | max | Float | The maximum value that can be measured by the sensor |
| Access Mode | asm | String | The access mode of the resource. Ex: read (r), write (w), read/write (rw) |
| Standard Format | st | String | The sensor format is which standard format |
| Health Status | Health | Integer | The health status of network or device. Range: -1 ~ 100
Good: > 80, Average: 60 ~ 80, Below Average: 40~60, Bad:0~40, -1: Off line or Fault |
| Message | msg | String | Message for resource |
| Extension | exten | String | Field for exten |
Example
{"n":"Room Temp","u":"Cel","v":0,"min":0,"max":100,"asm":"r","type":"d","rt":"ucum.Cel","st":"ipso","exten":"sid=3303"}