| Table of Contents |
|---|
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- receive (values/measurements, events, sysmsgs, images etc...) for processing [publish]
- send (e.g. actions, jobs, configurations etc.) [subscribe]
Prerequisites
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- name of the organization
<orgShortName> - serial of the sensor/gateway
<serial>(a serial is mapped to a location/site) - optional: certificate for encrypted connection (SSL/TLS)
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| Attribute name | Data type | Comments |
|---|---|---|
| String | Unique sensor identifier |
| String | indicates if there was a problem during the processing on the data. the value will be tagged. 0 mean no problem |
| String | ISO 8601 (with Timezone Information) in case of an empty string would the server would generate a now() timestamp |
| Number, String, Boolean | Measurement taken |
Special sensor: device_gps_location
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- this sensor is used to display the gateway status
- the gateway should try after a successful connect to the MQTT Broker this message. Only by successfully receiving the acknoledgement it can be assured that next messages can be published. (access security might appear)
- use events with state: "CONNECTED"
- on a regular shutdown of the gateway we recommend publishing a state: "OFFLINE" event
- in order to show a unexpected disconnect we recommend using the MQTT feature lastWillTestament (using an offline payload)
- the timezone information of the timestamp of the CONNECTED message is used to
System Messages
Topic: <orgShortName>/sys_msg/<serial>
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