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- Use MQTT Version = MQTT 5.0, if the MQTT server supports Topic aliases and set Topic Alias Maximum to a value greater than the number of stations on the line (for Payload Type = Sparkplug Edge Node) or greater than the number of topics used for writing (for Payload Type = Text only / JSON).
- Use aliases for metrics (for Payload Type = Sparkplug Edge Node): automatically using the Sparkplug Alias Mode=Automatic (HOBJ) parameter or manually using the SAL=alias item in the I/O tag address. If you use manual aliases, use low numbers (aliases 1-127 are encoded as 1 byte).
- For Payload Type = Sparkplug Edge Node: if there are many changes to the output I/O tags, we recommend setting the Batch Size parameter to a larger value than the default (10) and possibly increasing the Delay parameter in the station's time parameters. This will cause fewer messages to be generated (and each will contain multiple metrics), which reduces the overhead required to transmit one metric. If specific I/O tags change frequently, the message may contain several values for the same I/O tag (with timestamps). The disadvantage is the delay in the values.
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