CoAP (Constrained Application Protocol)
The Constrained Application Protocol Device Driver provides Iotellect Server with a request/response interaction model between application endpoints, supports built-in discovery of services and resources, and includes key concepts of the Web such as URIs and Internet media types. This driver is very similar to HTTP and it's used for machine-to-machine (M2M) data exchange.
The main features of the CoAP driver are:
Web protocol used in M2M with constrained requirements
Asynchronous message exchange
Low overhead and very simple to parse
URI and content-type support
Proxy and caching capabilities
Driver Information
Driver Plugin ID: | com.tibbo.linkserver.plugin.device.coap |
Global Settings
None defined.
User Level Settings
None defined.
Device Account Properties
Connection Properties
Connection settings define how Iotellect Server communicates with a CoAP server. The following provides a list of available connection properties:
Setting | Description |
Address | CoAP server IP address or host name. |
Protocol | CoAP or CoAP Secure (CoAPS). |
Port | CoAP server port. Default: 5683. |
URL | Path to a monitored resource located on your specified CoAP server. |
Request Type | CoAP request methods are currently supported: GET, POST, PUT and DELETE. |
Post Data | Data to be submitted with POST request, in the string form. |
Timeout | CoAP server operations timeout. |
Certificate | Alias of an SSL/TLS certificate to use for authentication. The certificate with that alias must exist in the Client Certificate storage of the Iotellect server. |
Device Assets
Assets are not supported by the driver.
Device Settings
The CoAP device driver creates one Device setting variable. This variable includes the following fields:
Property | Description |
Successful | Indicates successful CoAP device driver connections. |
Response Time, milliseconds | Server response time. |
Reply Code | CoAP response code. |
Reply | CoAP response body. |
Error | Error text, or NULL if the request was successful. |
Device Operations
Execute CoAP Request
This operation sends a raw CoAP GET, DELETE, PUT, or POST request to the device and returns the output. Input values include URL, request method, POST data and additional CoAP headers. Values returned are success flag, response time, CoAP reply code, headers, returned page text and error text.
Device Events
No events provided by the driver.
Connection Handling
This driver makes the device Online if a connection was successfully established.
Synchronization Details
CoAP monitor connects to the IP host, sends a CoAP request built using provided configuration (port, URL, request type and data, CoAP headers, agent, timeout) and analyzes the response.
 | If authentication is enabled in the settings and Basic Access Authentication is required to access a web page the driver also sends an authorization request. |
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