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Note: for a SparkPlug MQTT server, Topic has the form 'namespace/group_id/message_type/edge_node_id/[device_id]', where message_type indicates the message type (e.g. DDATA, DBIRTH, DDEATH).
A regular expression (e.g. spBv1.0/Sparkplug Devices/.*/MyDevice/Sensor2) can be used instead of message_type to cover all message types.
If Payload Type=Sparkplug, it is possible to omit the namespace and message_type parts and write the Topic in abbreviated form 'group_id/edge_node_id/[device_id]' (e.g. Sparkplug Devices/MyDevice/Sensor2).

Kotva
komunikacna_stanica_pozn komunikacna_stanica_pozn

Note: i is If the station address is in abbreviated form, commands (DCMD, NCMD) are not processed for it. If it is in the form of a regular expression ('namespace/group_id/.*/edge_node_id/[device_id]'), the station also processes commands (including the command sent by the D2000 KOM process if Send Node Control/Rebirth=YES). Therefore, we recommend the station address in abbreviated form. If it is also necessary to process commands (from other Host Applications), then create another station with an address in the form of a regular expression (e.g. spBv1.0/Sparkplug Devices/DCMD/MyDevice).

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• Text mode: The original implementation of the MQTT protocol contained only input text I/O tags with the addresses IN_TOPIC, IN_DATA, and optionally a pair of I/O tags with the addresses IN_ID and ACK_ID. The first two I/O tags were used to publish the received Topic and Payload (which then needed to be parsed in the script), the second two points were used to publish the packet identifier and confirm the processing of the packet. Thus, it was possible to ensure that for data sent with QoS > QoS_0, confirmation was sent only after data processing in the script.
  Output I/O tags with the addresses OUT_TOPIC and OUT_VALUE are used for writing.
• JSON mode: An extension for processing Payload with JSON data (Payload Type=JSON) was implemented with the help of input I/O tags with addresses JA=json_address. The D2000 KOM process directly parses the JSON payload and sets the values of I/O tags​​with JSON addresses. I/O tags with addresses IN_TOPIC, IN_DATA, IN_ID, and ACK_ID may not exist at all.
  Output I/O tags with the addresses OUT_TOPIC and OUT_VALUE are used for writing.
• Sparkplug mode: An extension for Payload processing with Sparkplug data (Payload Type=Sparkplug) has been implemented using input I/O tags with addresses SA=sparkplug_address. The D2000 KOM process directly parses the Sparkplug payload and sets the values of I/O tags ​​with the Sparkplug addresses. I/O tags with addresses IN_TOPIC, IN_DATA, IN_ID and ACK_ID may not exist at all.
  Writing simple values ​​is possible using output I/O tags with addresses ST=type;SA=sparkplug_address, where type is the Sparkplug definition of a data type (eg Int8, UInt16, DateTime, String, etc). The output I/O tags must be on the station with the Sparkplug address since the Topic is derived from it when writing.
  Note: STATE type messages that have a JSON payload can be parsed using I/O tags with a JSON address (typically an I/O tag of Di type with an address of JA=online).

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