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| <h1 title="Package" class="title">Package org.apache.edgent.connectors.iot</h1> |
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| <div class="block">Edgent device connector API to a message hub.</div> |
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| <td class="colFirst"><a href="../../../../../org/apache/edgent/connectors/iot/Commands.html" title="interface in org.apache.edgent.connectors.iot">Commands</a></td> |
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| <div class="block">Devic command identifiers used by Edgent.</div> |
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| <div class="block">Device event identifiers used by Edgent.</div> |
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| <td class="colFirst"><a href="../../../../../org/apache/edgent/connectors/iot/IotDevice.html" title="interface in org.apache.edgent.connectors.iot">IotDevice</a></td> |
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| <div class="block">Generic Internet of Things device connector.</div> |
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| <td class="colFirst"><a href="../../../../../org/apache/edgent/connectors/iot/QoS.html" title="interface in org.apache.edgent.connectors.iot">QoS</a></td> |
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| <div class="block">Device event quality of service levels.</div> |
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| <h2 title="Package org.apache.edgent.connectors.iot Description">Package org.apache.edgent.connectors.iot Description</h2> |
| <div class="block">Edgent device connector API to a message hub. |
| <P> |
| Generic device model that supports a device model consisting of: |
| <UL> |
| <LI> |
| <B>Device events</B> - A device <a href="../../../../../org/apache/edgent/connectors/iot/IotDevice.html#events-org.apache.edgent.topology.TStream-java.lang.String-int-"><code>publishes</code></a> <em>events</em> as messages to a message hub to allow |
| analysis or processing by back-end systems, etc.. A device event consists of: |
| <UL> |
| <LI> <B>event identifier</B> - Application specified event type. E.g. <code>engineAlert</code></LI> |
| <LI> <B>event payload</B> - Application specified event payload. E.g. the engine alert code and sensor reading.</LI> |
| <LI> <B>QoS</B> - <a href="../../../../../org/apache/edgent/connectors/iot/QoS.html" title="interface in org.apache.edgent.connectors.iot"><code>Quality of service</code></a> for message delivery. Using MQTT QoS definitions.</LI> |
| </UL> |
| Device events can be used to send any data including abnormal events |
| (e.g. a fault condition on an engine), periodic or aggregate sensor readings, |
| device user input etc. |
| <BR> |
| The format for the payload is JSON, support for other payload formats may be added |
| in the future. |
| </LI> |
| <LI> |
| <B>Device Commands</B> - A device <a href="../../../../../org/apache/edgent/connectors/iot/IotDevice.html#commands-java.lang.String...-"><code>subscribes</code></a> to <em>commands</em> from back-end systems |
| through the message hub. A device command consists of: |
| <UL> |
| <LI> <B>command identifier</B> - Application specified command type. E.g. <code>statusMessage</code></LI> |
| <LI> <B>command payload</B> - Application specified command payload. E.g. the severity and |
| text of the message to display.</LI> |
| </UL> |
| Device commands can be used to perform any action on the device including displaying information, |
| controlling the device (e.g. reduce maximum engine revolutions), controlling the Edgent application, etc. |
| <BR> |
| The format for the payload is typically JSON, though other formats may be used. |
| </LI> |
| </UL> |
| <P> |
| Device event and command identifiers starting with "<a href="../../../../../org/apache/edgent/connectors/iot/IotDevice.html#RESERVED_ID_PREFIX"><code>edgent</code></a>" |
| are reserved for use by Edgent. |
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