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| Name | Data Type | Description |
|---|---|---|
| bdSeq | Long | The last bdSeq number sent by the Edge Node in an NBIRTH message |
Birth Count | Long | The number of NBIRTH messages since the last time the info metrics were reset via the Node Info/Reset Info tag |
| Current Server | String | The current MQTT Server the Edge Node is connected to |
| Data Latency (ms) | Long | The time in milliseconds between MQTT Engine receiving of the last message and the payload's reported time. Note: For this to be very accurate the edge node's clock and the system clock running MQTT Engine should be synced |
| Death Count | Long | The number of NDEATH messages since the last time the info metrics were reset via the Node Info/Reset Info tag |
| Message Schema | String | The schema associated with the Edge Node (e.g. Sparkplug B) |
| Offline DateTime | DateTime | The time at which the last NDEATH message was received by MQTT Engine |
| Online | Boolean | Whether or not the Edge Node is online. This is determined by whether the last lifecycle message was an NBIRTH or NDEATH |
| Online DateTime | DateTime | The time at which the last NBIRTH message was received by MQTT Engine |
| Reset Info | Boolean | Writable tag to 'reset' the Node Info metrics |
| seq | Long | The last Sparkplug seq number received from the Edge Node |
| Total Bytes Recvd (bytes) | Long | The number of bytes received from the Edge Node since the last time the info metrics were reset via the Node Info/Reset Info tag |
| Total Bytes Xmit (bytes) | Long | The number of bytes sent to the Edge Node since the last time the info metrics were reset via the Node Info/Reset Info tag |
| Transmission Version | String | The version of MQTT Transmission installed at the Edge Node |
Device Control
The tags in each Device Control folder are created based on a supplied metric within the DBIRTH message from the Edge Node. These will only appear if the Edge Node implementation supports them. It is up to the Edge Node implementation (MQTT Transmission for example) to support any functionality it supplies via the DBIRTH. If the Edge Node does not support the specific control, it should not include it in the DBIRTH payload.
| Name | Data Type | Description |
|---|---|---|
| Rebirth | Boolean | Writeable tag to request the Device to resend its cached DBIRTH message without disconnecting or sending DEATH messages first |
Device Info
The tags below are general information tags with respect to Sparkplug Devices. These are created, managed and updated by MQTT Engine based on messages arriving from each given Device.
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