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Publishing MQTT Messages from a Script

Content to be migrated from Confluence (99057679). How to call system.cirruslink.transmission.publish() from an Ignition Gateway Tag Change script. Covers:

  • RPC client prerequisites
  • publish() method signature
  • Inflight message limits — 10 pre-4.0.22 → 500 in 4.0.22–4.0.30 → 32K in 4.0.31+
  • Error log messages